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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 47. Отображено 47.
04-04-2023 дата публикации

Simulation method for contact resistance of GIS (Gas Insulated Switchgear) contact

Номер: CN115906575A
Автор: ZHANG LEI, CHEN LIANGYUAN, HAN FANGYUAN, RAO XIAJIN, PAN SHAOMING, LU YUFENG, LI DAJIAN, SON JI-WON, ZHAO JIAN, LI RUI, CHEN QIANYI
Принадлежит:

The invention discloses a GIS contact contact resistance simulation method, which comprises the following steps: firstly, calculating the equivalent radius of a contact resistance, calculating the through-flow sectional area of a current flowing through the contact resistance according to the equivalent radius, keeping the through-flow sectional area unchanged, converting the shape of the contact resistance into a rectangular block, and calculating the contact resistance according to the rectangular block; establishing an equivalent contact resistance model for each contact finger in three-dimensional software; carrying out model classification fusion on the whole touch finger area; in the electromagnetic field calculation, the conductivity is converted by combining the size of the contact resistance and the size of the equivalent model so as to simulate the working conditions of different contact resistances; in temperature-fluid field coupling calculation, the thermal conductivity of ...

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Номер записи: 1
30-05-2023 дата публикации

System for detecting operation state of regional equipment in transformer substation

Номер: CN116184085A
Автор: ZHANG LEI, HAN FANGYUAN, RAO XIAJIN, CHEN LIANGYUAN, LI RUI, PAN SHAOMING, LU YUFENG, LI DAJIAN, SON JI-WON, ZHAO JIAN, CHEN QIANYI
Принадлежит:

The invention provides an operation state detection system for regional equipment in a transformer substation, and relates to the technical field of equipment state detection. The regional equipment running state detection system in the transformer substation comprises a detection system, the detection system is composed of a cable line detection module, a bridge detection module, a transformer detection module, a power distribution cabinet detection module, a capacitance compensation cabinet detection module and a regional detection module, and the detection system is electrically connected with an analysis module. And the analysis module is in communication connection with the report generation module through the Ethernet. Through real-time detection of various corollary equipment such as cable lines, bridges, transformers, power distribution cabinets, capacitance compensation cabinets and regional environments in the operation process of the transformer substation, detection items are ...

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Номер записи: 2
27-06-2023 дата публикации

Method for measuring thermal expansion coefficient of epoxy resin material

Номер: CN116337927A
Автор: ZHANG LEI, PAN SHAOMING, SU YI, RAO XIAJIN, LI DAJIAN, CHEN LIANGYUAN, LI RUI, ZHAO JIAN, LU YUFENG, YU CHANGTING
Принадлежит:

The invention relates to the technical field of polymer and high-voltage insulating materials, and particularly discloses a method for measuring the thermal expansion coefficient of an epoxy resin material, which comprises the following steps: preparing an epoxy resin material sample; performing dielectric testing on the sample, and testing dielectric constants at different temperatures; fitting dielectric constants at different temperatures measured according to the double H-N function and conductivity loss to obtain an optical frequency dielectric constant epsilon infinity at each temperature; and the thermal expansion coefficient is solved by combining the optical frequency dielectric constants at all temperatures with the relationship between the optical frequency dielectric constants and the temperatures. According to the method for measuring the thermal expansion coefficient of the epoxy resin material, the bulk thermal expansion coefficient of the material is calculated based on ...

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Номер записи: 3
07-07-2023 дата публикации

Microfluidic gas detection device for GIS (Gas Insulated Switchgear) equipment

Номер: CN116399910A
Автор: ZHANG XIAOXING, JIANG YUANDONG, TIAN SHUANGSHUANG, LIU PENG, LI DAJIAN, ZHANG WEI, RAO XIAJIN, WU YUNJIAN, YUAN JIAWEI
Принадлежит:

The invention discloses a microfluidic gas detection device for GIS equipment, and belongs to the technical field of gas detection. A gas detection assembly in the device comprises a microfluidic channel and a plurality of gas-sensitive units, each gas-sensitive unit comprises a gas-sensitive chamber and a gas-sensitive part arranged in the gas-sensitive chamber, the gas-sensitive parts can respectively identify different gas types, and the microfluidic channel is respectively communicated with the gas-sensitive chambers; the volume change assembly comprises a volume-variable gas containing unit and a suction part, the gas containing unit comprises a first gas containing part and a second gas containing part which are marked with volume scale marks, the first gas containing part is communicated with a gas sensitive chamber, and the second gas containing part is communicated with the microfluidic channel through the suction part; the suction part can suck all gas in the first gas containing ...

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Номер записи: 4
30-05-2023 дата публикации

Multifunctional single sensor suitable for GIS equipment defect detection

Номер: CN116184140A
Автор: JIANG YUANDONG, ZHANG XIAOXING, LI DAJIAN, ZHANG GUOZHI, ZENG JIA, TANG BIN, LIANG QINQIN, RAO XIAJIN, ZHANG LEI, TIAN SHUANGSHUANG, ZHANG YIN, WU YUNJIAN, ZHU LIPING, YU MIN, LIU PENG, WANG JIANGFAN
Принадлежит:

The invention discloses a multifunctional single sensor suitable for GIS equipment defect detection, and belongs to the technical field of electrical equipment insulation detection. A single sensor can be used for simultaneously monitoring GIS discharge defects and mechanical defects, the sensor comprises a sensor body and a flange plate, the sensor body is installed on the inner surface of the flange plate, an insulating tape layer is laid between the sensor body and the inner surface of the flange plate, and the flange plate is fixedly connected to a GIS equipment shell through a connecting bolt; a four-layer structure is arranged and sequentially comprises a matching layer, a piezoelectric ceramic material layer, a mass backing layer and a metal electrode material layer from bottom to top, and a signal line is further fixedly connected to the metal electrode material layer. The problems that a traditional single sensor only detects one kind of signals, the detection precision is not ...

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Номер записи: 5
05-05-2023 дата публикации

High-proportion new energy power grid low-carbon scheduling method

Номер: CN116070847A
Автор: PENG BOYA, SON JI-WON, MENG XUANREN, LIU MOSI, ZHENG KUN, HU HONG, LI MINGPO, SONG YI, RAO XIAJIN
Принадлежит:

The invention belongs to the technical field of power system dispatching, and particularly relates to a high-proportion new energy power grid low-carbon dispatching method, which comprises the following steps of S1, proposing energy power carbon dispatching characteristics of near-zero carbon emission energy and fossil fuel energy; s2, extracting power plant electrical carbon scheduling characteristics of the carbon capture power plant; s3, constructing a low-carbon power dispatching decision model framework; s4, establishing a low-carbon power dispatching model considering the carbon cost; s5, establishing a low-carbon scheduling constraint model considering multi-energy power-carbon scheduling characteristics; and S6, solving the unit output and load considering the optimal carbon emission according to the operation data of the system. The invention discloses a power system optimization operation method based on demand response considering carbon emission flow. The influence of electricity ...

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Номер записи: 6
02-06-2023 дата публикации

Optimized scheduling method and system considering wind and light prediction and maintenance plan

Номер: CN116205345A
Автор: PENG BOYA, SON JI-WON, LIU MOSI, ZHENG KUN, MENG XUANREN, HU HONG, LI MINGPO, SONG YI, RAO XIAJIN
Принадлежит:

The invention belongs to the field of electric power system scheduling, and particularly relates to an optimal scheduling method and system considering wind and light prediction and a maintenance plan, and the method comprises the following steps: S1, obtaining the historical operation data of an electric power system, the unit parameters of the electric power system, and an initial maintenance plan; s2, predicting a wind power output curve; s3, predicting a photovoltaic output curve; s4, establishing a model; and S5, obtaining a unit maintenance plan and a scheduling strategy in the system. According to the method, randomness of new energy output, maintenance plan economical efficiency and operation characteristics are fully considered, on the basis of accurate prediction of wind and light output, by establishing the collaborative optimization scheduling model considering the maintenance plan, collaborative operation of different energy sources of wind, light and fire is achieved while ...

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Номер записи: 7
06-06-2023 дата публикации

Carbon tetrafluoride mixed gas detection device and method

Номер: CN116223421A
Автор: RAO XIAJIN, ZHANG LEI, PENG BOYA, PAN SHAOMING, LU YUFENG, SU YI
Принадлежит:

The invention discloses a carbon tetrafluoride mixed gas detection device and method, and relates to an electrical equipment detection technology. The device comprises a gas detection chamber, wherein an infrared light source and a detector are arranged in the gas detection chamber; the gas sampling chamber is of a cylindrical structure, undetected carbon tetrafluoride mixed gas is introduced into the gas sampling chamber, transparent windows are arranged at two ends of the gas sampling chamber, the other end of the gas sampling chamber is connected with the light path returning chamber, and a light path reflecting mirror is arranged in the light path returning chamber. According to the invention, a differential detection mode of a single light source and double detectors is adopted, the infrared light emitted by the light source is split into the measuring light and the reference light, and the volume fraction of the carbon tetrafluoride gas can be calculated and inverted only by respectively ...

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Номер записи: 8
14-07-2023 дата публикации

Maximum power tracking injection method for broadband impedance spectroscopy on-line test signal

Номер: CN116430166A
Автор: PAN SHAOMING, ZHAO JIAN, SU YI, ZHANG YIYI, FENG BO, ZHANG LEI, HAN FANGYUAN, LI RUI, CHEN LIANGYUAN, ZHANG LONGFEI, LU YUFENG, RAO XIAJIN, TANG JIE
Принадлежит:

The invention belongs to the technical field of power systems, and particularly relates to a broadband impedance spectroscopy on-line test signal maximum power tracking injection method, which is characterized in that a tested cable is connected with a switched capacitor matrix, an isolation capacitor and an isolation inductor, and the isolation inductor is connected with the isolation capacitor to form a test circuit; sending a test signal to the test circuit by adopting a broadband impedance spectrum; calculating initial power by adopting a maximum power tracking equation, and finding an initial switched capacitor matrix value when the power of a test signal injected into the cable is maximum; extracting voltage and current of a test signal, and adjusting a switched capacitor matrix value; and calculating real-time power, and finding a switched capacitor matrix value when the power of the test signal injected into the cable is maximum. According to the method for monitoring the cable ...

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Номер записи: 9
27-06-2023 дата публикации

High-voltage isolation circuit, use method thereof and impedance correction method

Номер: CN116346119A
Автор: PAN SHAOMING, ZHAO JIAN, SU YI, ZHANG YIYI, FENG BO, ZHANG LEI, HAN FANGYUAN, LI RUI, CHEN LIANGYUAN, ZHANG LONGFEI, LU YUFENG, RAO XIAJIN, TANG JIE
Принадлежит:

The invention discloses a high-voltage isolation circuit and a use method and an impedance correction method thereof, a capacitor Cs is connected in series in the isolation circuit by utilizing the characteristic that a capacitor passes through high frequency and resists low frequency, the Cs can inhibit power frequency high voltage, but does not influence a test signal sent by BIS equipment, so that the purposes of isolating normal power frequency high voltage and protecting the BIS test equipment are achieved, and meanwhile, the test efficiency is improved. The BIS equipment test signal can be injected and returned; when a fault arc occurs, the MCU controls the series inductance matrix to adjust an inductance value, so that the isolation circuit generates series resonance at a frequency corresponding to an arc signal with maximum energy, thereby realizing high-energy arc signal isolation and protecting BIS test equipment. In the testing process, due to the fact that the BIS can be subjected ...

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Номер записи: 10
25-07-2023 дата публикации

Method for calculating current-carrying capacity of steel-cored aluminum strand by considering harmonic influence

Номер: CN116484571A
Автор: ZHANG LEI, CHEN LIANGYUAN, LI RUI, HAN FANGYUAN, RAO XIAJIN, PAN SHAOMING, LU YUFENG, LI DAJIAN, SON JI-WON, ZHAO JIAN, CHEN QIANYI
Принадлежит:

The invention discloses a method for calculating the current-carrying capacity of a steel-cored aluminum strand by considering the harmonic influence. The method comprises the following steps: firstly, determining the current-carrying capacity of the steel-cored aluminum strand; analyzing and adopting a maximum current-carrying capacity calculation method of a conventional power transmission line to preliminarily calculate the current-carrying capacity of the steel-cored aluminum strand when the harmonic influence is not considered, and analyzing a preliminary calculation result; according to the analysis result, when the harmonic influence is considered, the harmonic current is regarded as another heat source superposed on the basis of the fundamental wave, and the fundamental wave alternating-current resistance and the harmonic alternating-current resistance of each order are calculated; and calculating the current-carrying capacity of the steel-cored aluminum strand in consideration ...

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Номер записи: 11
26-05-2023 дата публикации

Epoxy resin defect repair visualization device for dry-type transformer

Номер: CN116170560A
Автор: MA SHOUXIAO, HUANG WEI, RAO XIAJIN, PENG BOYA, LI DAJIAN, ZHANG LEI, CHEN LIANGYUAN, LU YUFENG, SU YI, XIA XIAOFEI
Принадлежит:

The invention discloses a visual device for repairing epoxy resin defects of a dry-type transformer, and relates to the technical field of transformer maintenance. The device comprises a video module, an input module, a data judgment module, a communication module, an MCU system, a micro motor, a video output module, a data storage module and a light module. According to the device, an image of a working area is obtained through the video module and transmitted to the ISP display screen through the communication module, debugging is convenient, functions are complete, operation is simpler and more labor-saving, the repairing agent discharging process is easier to master, and operation can be conducted in a specific environment and position; and meanwhile, the micro motor is controlled by keys in the input module and the MCU system, and the device can be matched with the video module and the ISP display screen to work, so that an operator can master the amount of the repairing agent in real ...

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Номер записи: 12
07-04-2023 дата публикации

Comprehensive health state detection system for aluminum cable steel reinforced

Номер: CN115931047A
Автор: PAN SHAOMING, ZHANG LEI, HAN FANGYUAN, CHEN LIANGYUAN, ZHAO JIAN, RAO XIAJIN, LU YUFENG, LI RUI
Принадлежит:

The invention provides an aluminum cable steel reinforced comprehensive health state detection system, and relates to the technical field of state detection systems. The comprehensive health state detection system for the aluminum cable steel reinforced comprises an acquisition module, the sending end of the acquisition module is connected with the receiving end of a detection module through the Ethernet, and the acquisition module is composed of an appearance image acquisition unit, a diameter data acquisition unit and a length data acquisition unit. And the appearance image detection and acquisition unit is used for photographing, acquiring and uploading the appearance image of the steel-cored aluminum strand. Through the cooperation of the acquisition module and the detection module, the appearance, diameter, length, lay length, mechanical property and conductivity of the steel-cored aluminum strand are subjected to systematic process detection, then the analysis module compares and ...

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Номер записи: 13
21-07-2023 дата публикации

Preparation method of nano hybrid epoxy resin with high breakdown strength

Номер: CN116462938A
Автор: ZHANG LEI, PAN SHAOMING, SU YI, RAO XIAJIN, LI DAJIAN, CHEN LIANGYUAN, LI RUI, ZHAO JIAN, LU YUFENG, YU CHANGTING
Принадлежит:

The invention belongs to the technical field of high polymer materials and high-voltage insulation, and particularly relates to a preparation method of nano hybrid epoxy resin with high breakdown strength, which comprises the following steps: S1, mixing a curing agent with AP-POSS nano filler to obtain a mixture A; s2, after the mixture A prepared in the step S1 is subjected to mechanical stirring, centrifugal stirring and ultrasonic oscillation, epoxy resin and an accelerant are added, and a mixture B is obtained; and S3, centrifugally stirring and mechanically stirring the mixture B prepared in the step S2, degassing, carrying out ultrasonic oscillation, pouring into a preheated mold, curing, and finally cleaning and drying to obtain the nano hybrid epoxy resin. The prepared nano hybrid epoxy resin is good in insulating property and high in anti-breakdown strength, and has very important significance in electronic insulation application.

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Номер записи: 14
25-04-2023 дата публикации

Method for determining convective heat transfer coefficient of shell of finned radiator

Номер: CN116011277A
Автор: ZHANG LEI, HAN FANGYUAN, CHEN LIANGYUAN, RAO XIAJIN, PAN SHAOMING, LU YUFENG, LI DAJIAN, SON JI-WON, ZHAO JIAN, LI RUI, CHEN QIANYI
Принадлежит:

The invention discloses a method for determining the convective heat transfer coefficient of a shell of a finned radiator, and the method comprises the steps: building a group of radiator models, including radiating fins, upper and lower oil collecting pipes, transformer oil and an air bag outside the radiator, applying corresponding material attributes to different structures, setting boundary conditions, and carrying out the grid division, thereby obtaining the convective heat transfer coefficient of the shell of the finned radiator. And finally, carrying out temperature-fluid field simulation analysis, and calculating to obtain the convective heat transfer coefficient of the cooling fin. By means of the method, the convective heat transfer coefficient of the shell of the finned radiator can be determined more accurately, and then the heat dissipation performance and structural optimization design of the radiator are guided.

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Номер записи: 15
21-07-2023 дата публикации

Method for improving breakdown strength of epoxy resin material

Номер: CN116462874A
Автор: PAN SHAOMING, SU YI, RAO XIAJIN, ZHANG LEI, LI DAJIAN, CHEN LIANGYUAN, LI RUI, ZHAO JIAN, LU YUFENG, YU CHANGTING
Принадлежит:

The invention relates to the technical field of macromolecular and high-voltage insulating materials, and particularly discloses a method for improving the breakdown strength of an epoxy resin material, which comprises the following steps: putting an epoxy resin material sample into heat treatment equipment in a hanging manner, heating to 180-230 DEG C, preserving heat for 24-96 hours, taking out and cooling. According to the method for improving the breakdown strength of the epoxy resin material, the cured epoxy resin is subjected to short-term high-temperature heat treatment, so that the epoxy resin is promoted to form a layer of compact oxide film on the surface, in-vivo charge transport is hindered, the breakdown performance of the epoxy insulating material is improved, and compared with an untreated epoxy resin material, the breakdown strength of the epoxy resin material is improved. The breakdown strength is improved by more than 9%. According to the invention, the breakdown strength ...

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Номер записи: 16
08-08-2023 дата публикации

Method for evaluating cumulative effect of transformer

Номер: CN116559722A
Автор: ZHANG LEI, LI RUI, CHEN LIANGYUAN, HAN FANGYUAN, LU YUFENG, PAN SHAOMING, RAO XIAJIN, SU YI
Принадлежит:

The invention discloses a transformer cumulative effect evaluation method. The method comprises the following steps: calculating the maximum current when three-phase grounding short circuit occurs at a low-voltage side outlet of a transformer; according to the maximum current and the transformer iron core and winding structure, calculating corresponding leakage magnetic field distribution in the transformer; according to the leakage magnetic field distribution, the change of the allowable value of each force under the cumulative effect in the transformer short-circuit checking process is calculated, and the minimum safety coefficient considering the cumulative effect is calculated, so that the influence degree of the cumulative effect on the transformer is judged. Compared with an existing checking method, the method has the advantages that the influence of the cumulative effect on the anti-short-circuit capability of the transformer is considered, the checking of the anti-short-circuit ...

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Номер записи: 17
11-04-2023 дата публикации

Perfluorohexanone mixed gas detection device and method

Номер: CN115950844A
Автор: HUANG WEI, RAO XIAJIN, PENG BOYA, CHEN LIANGYUAN, SU YI, PAN SHAOMING, XIA XIAOFEI
Принадлежит:

The invention discloses a perfluorohexanone mixed gas detection device and method, and relates to the technical field of environment-friendly insulating gas mixing ratio detection. The device is composed of an ultraviolet light source, an optical fiber, a spectrograph and a gas absorption cell, ultraviolet light is transmitted into the gas absorption cell through the optical fiber, after the ultraviolet light is reflected for multiple times in the gas absorption cell, the ultraviolet light absorbed by gas to be detected is emitted out of a light outlet of the gas absorption cell and then enters the spectrograph through the optical fiber, and the gas to be detected is detected. The transmission light intensities of different wave bands are measured through the spectrograph, transmission light intensity data are imported into analysis software of the industrial control all-in-one machine through the USB data line to be analyzed, the absorption spectrum and the mixing ratio of the gas to be ...

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Номер записи: 18
11-07-2023 дата публикации

Infrared spectrum-based C6F12O mixed gas leakage detection device and method

Номер: CN116412979A
Автор: RAO XIAJIN, ZHANG LEI, ZHANG XIAOXING, SU YI, HUANG WEI
Принадлежит:

The invention relates to the technical field of mixed gas detection, and particularly discloses a C6F12O mixed gas leakage detection device and method based on infrared spectroscopy, and the device comprises a gas chamber which is filled with C6F12O mixed gas and is provided with a gas inlet and a gas outlet; the rotating disc is arranged on one side of the air chamber and communicated with the air chamber, a first small hole and a second small hole are formed in the rotating disc, and the first small hole is further provided with an optical filter; the infrared light source is arranged on one side of the turntable, and is used for emitting pulse type wide-spectrum infrared light and penetrating through the turntable to enter the gas chamber; the detector is arranged on the side wall of the gas chamber and is used for receiving an infrared light optical signal penetrating through the gas chamber and converting the infrared light optical signal into an electric signal; and the signal processing ...

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Номер записи: 19
23-05-2023 дата публикации

Temperature inversion method for intermediate joint of three-core alternating-current cable in direct-current operation mode

Номер: CN116151122A
Автор: ZHANG LEI, CHEN LIANGYUAN, LI RUI, HAN FANGYUAN, RAO XIAJIN, PAN SHAOMING, LU YUFENG, LI DAJIAN, SON JI-WON, ZHAO JIAN, CHEN QIANYI
Принадлежит:

The invention discloses a temperature inversion method for an intermediate joint of a three-core alternating-current cable in a direct-current operation mode. The temperature inversion method comprises the following steps: constructing a three-core alternating-current cable simulation model; considering the influence of direct current transformation of the alternating current cable on the maximum working temperature of the three-core alternating current cable, and selecting the maximum long-term working temperature of the three-core alternating current cable simulation model in a direct current operation mode; changing a loading condition of the three-core AC cable simulation model, obtaining temperature inversion data, and constructing a temperature inversion data set; and constructing a temperature inversion model of the intermediate joint of the three-core AC cable, inputting the temperature inversion data set into the temperature inversion model of the intermediate joint of the three-core ...

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Номер записи: 20
27-06-2023 дата публикации

Leakage alarm device for environment-friendly gas insulation equipment

Номер: CN116343438A
Автор: RAO XIAJIN, CHEN LIANGYUAN, ZHANG XIAOXING, PENG BOYA, HUANG WEI
Принадлежит:

The invention relates to the technical field of power equipment monitoring equipment, in particular to an environment-friendly gas insulation equipment leakage alarm device which comprises a device body, a mobile monitoring part and a host control part are arranged in the device body, and data interconnection between the mobile monitoring part and the host control part is achieved through a wireless communication module; the mobile monitoring part can be controlled to move, the mobile monitoring part comprises a central control chip, a leakage monitoring module and a power module, the host control part comprises a host and an audible and visual alarm, and the leakage monitoring module is used for detecting the concentration of leaked gas; the power module is used for providing power for the device body. The mobile alarm device is adopted, comprehensive monitoring in the horizontal direction and the vertical direction is achieved, the flexibility is extremely high, and the arrangement cost ...

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Номер записи: 21
06-06-2023 дата публикации

Vacuum degree detection method of vacuum switch

Номер: CN116223478A
Автор: SU YI, XIA XIAOFEI, HAN FANGYUAN, ZHANG WEI, LU YUFENG, RAO XIAJIN, HUANG WEI, ZHANG LEI, CHEN LIANGYUAN
Принадлежит:

The invention relates to the technical field of vacuum switches, in particular to a vacuum degree detection method of a vacuum switch, which comprises the following steps of: 1, eliminating external interference; 2, emitting laser to generate and extract plasma capable of reflecting a characteristic spectral signal of the vacuum degree; and 3, measuring a spectral signal of the plasma generated by laser induction to judge the vacuum state. According to the vacuum degree online detection method based on the LIBS technology, the basic rule of the influence of the vacuum degree on the characteristic signal is obtained by researching the relation between the vacuum degree of the vacuum switch and the plasma spectrum signal, the LIBS technology makes up for the defects of a traditional analysis method, and the detection accuracy is improved. The system has the advantages of very small damage to materials (commonly used for gemstone and cultural relic detection), no need of sample preparation ...

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Номер записи: 22
05-05-2023 дата публикации

Epoxy resin medium thickness measuring system based on electrical chromatography

Номер: CN116067270A
Автор: MA SHOUXIAO, LI DAJIAN, RAO XIAJIN, SU YI, XIA XIAOFEI
Принадлежит:

The invention relates to the technical field of electrical measurement, and particularly discloses an epoxy resin medium thickness measurement system based on electrical chromatography. The epoxy resin medium thickness measurement system comprises a multi-channel gating module, an electrode voltage acquisition module, a main control measurement module, a GUI interaction module and a power source excitation source module. The measuring system disclosed by the invention is used for quickly and precisely measuring the thickness of the epoxy resin medium in the dry-type transformer, can effectively eliminate the influence of impurities on the measuring precision, can be matched with various electrical chromatography probes, can simultaneously measure multiple channels, and can also be used for precisely measuring the complex condition of a two-phase medium at the same time.

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Номер записи: 23
04-04-2023 дата публикации

Particle trapper and gas-insulated metal-enclosed switchgear housing assembly

Номер: CN115888983A
Автор: PAN SHAOMING, SU YI, LI DAJIAN, CHEN LIANGYUAN, ZHAO JIAN, LU YUFENG, RAO XIAJIN, ZHANG LEI, YU CHANGTING, LI RUI
Принадлежит:

The invention discloses a particle trapper and a gas-insulated metal-enclosed switchgear shell assembly. The particle catcher comprises a sleeve type base body, the base body comprises an inner layer shell and an outer layer shell, the outer layer shell is located below the bottom of the inner layer shell, the outer layer shell and the inner layer shell form a catching cavity, and an opening groove is formed in the position, corresponding to the catching cavity, of the inner layer shell to form a grid structure. A blocking piece is arranged in the groove wall of the open groove to form a bent falling channel. According to the particle catcher, the blocking piece is arranged in the groove wall of the open groove to form the bent falling channel, under the special conditions such as voltage polarity sudden change under the impact condition, the blocking piece plays a blocking role, and metal particles can be prevented from escaping from the open groove and entering the catching cavity to ...

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Номер записи: 24
26-05-2023 дата публикации

Electrical equipment insulation detection device convenient to move

Номер: CN116165410A
Автор: JIANG YUANDONG, ZHANG XIAOXING, LI DAJIAN, ZHANG GUOZHI, ZENG JIA, TANG BIN, LIANG QINQIN, RAO XIAJIN, ZHANG LEI, TIAN SHUANGSHUANG, ZHANG YIN, WU YUNJIAN, ZHU LIPING, YU MIN, LIU PENG, WANG JIANGFAN
Принадлежит:

The invention discloses an electrical equipment insulation detection device convenient to move, which comprises a universal meter body provided with a knob, the universal meter body is provided with a mounting box, a first rotating shaft is arranged in the mounting box, the first rotating shaft is provided with a first gear, the knob is provided with latches, the first rotating shaft is provided with a first bevel gear, and the first bevel gear is engaged with a second bevel gear. A first screw rod is arranged on the second bevel gear, a first threaded plate is arranged on the first screw rod, a first magnetic block is arranged on the first threaded plate, a clamping mechanism is arranged in the mounting box, a prompt shielding mechanism is arranged in the clamping mechanism, and each connecting port can be shielded by arranging a rotating plate, so that each connecting port can be protected when not in use, and the service life of the connecting port is prolonged. When the knob is rotated ...

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Номер записи: 25
04-07-2023 дата публикации

Method for efficiently coating epoxy group with micron aluminum oxide in short time

Номер: CN116376328A
Автор: PAN SHAOMING, SU YI, LI DAJIAN, CHEN LIANGYUAN, ZHAO JIAN, LU YUFENG, RAO XIAJIN, ZHANG LEI, YU CHANGTING, LI RUI
Принадлежит:

Aiming at the low efficiency phenomenon in the prior art, the method comprises the following steps: firstly, drying micron Al2O3 particles to avoid the adverse effect of moisture on the efficient grafting of micron filler, and then promoting the contact and reaction of a coupling agent and the filler by combining high-temperature mechanical stirring and ultrasonic oscillation, so that the high-efficiency coating of the epoxy group with the micron Al2O3 particles is realized, and the high-efficiency coating of the epoxy group with the micron Al2O3 particles is realized. Therefore, the purpose of efficiently grafting the micron filler within a short time is achieved. The method has the advantages of being high in efficiency and short in consumed time, the time cost in filler modification can be reduced, therefore, the working efficiency and the yield of the basin-type insulator are improved, and the method has very high popularization value.

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Номер записи: 26
09-06-2023 дата публикации

Steel core high-conductivity aluminum stranded wire and processing method thereof

Номер: CN116246819A
Автор: ZHANG LEI, HAN FANGYUAN, RAO XIAJIN, CHEN LIANGYUAN, LI RUI, PAN SHAOMING, LU YUFENG, LI DAJIAN, SON JI-WON, ZHAO JIAN, CHEN QIANYI
Принадлежит:

The invention provides a steel core high-conductivity aluminum stranded wire and a processing method thereof, and relates to the technical field of cable processing. The steel core high-conductivity aluminum stranded wire comprises an inner wire core, and is characterized in that an outer core layer is arranged outside the inner wire core, the inner wire core is formed by concentrically stranding a plurality of strands of steel wires, and the outer core layer is formed by concentrically stranding a plurality of strands of duralumin wires; a duralumin wire used by the outer core layer comprises the following components: 0.0975%-0.145% of iron, 0.125%-0.185% of silicon, 0.012%-0.16% of boron, 0.01%-0.15% of gadolinium, 0.015%-0.025% of copper, 0.0575%-0.125% of scandium and the balance of aluminum, and the proportion of iron to silicon of the duralumin wire is controlled to be 1.5%-2.2. Four metal elements of boron, gadolinium, copper and scandium are added in the preparation process of the ...

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Номер записи: 27
28-07-2023 дата публикации

Calculation method for solving dynamic change of alternating-current resistance of steel-cored aluminum strand

Номер: CN116502398A
Автор: ZHANG LEI, CHEN LIANGYUAN, LI RUI, HAN FANGYUAN, RAO XIAJIN, PAN SHAOMING, LU YUFENG, LI DAJIAN, SON JI-WON, ZHAO JIAN, CHEN QIANYI
Принадлежит:

The invention discloses a calculation method for solving the dynamic change of the AC resistance of a steel-cored aluminum strand, and the method comprises the steps: building an internal electromagnetic field model of the steel-cored aluminum strand, and presenting the internal electromagnetic field model of the steel-cored aluminum strand in a Bessel function mode; solving the internal electromagnetic field model of the steel-cored aluminum strand to obtain a vector solution of electric field intensity; according to the vector solution of the electric field intensity, calculating the internal current distribution condition of the steel-cored aluminum strand; the alternating-current resistance of the conductor is obtained according to the current distribution condition; and solving the alternating-current resistance of the conductor to obtain the alternating-current resistance of the steel-cored aluminum strand, which is obtained based on a Bezier equation. Therefore, according to the ...

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Номер записи: 28
14-04-2023 дата публикации

Degradation and recovery method of epoxy resin pouring coil insulating material

Номер: CN115960439A
Автор: RAO XIAJIN, HAN FANGYUAN, SU YI, LU YUFENG, XIA XIAOFEI, CHEN LIANGYUAN
Принадлежит:

The invention relates to the technical field of epoxy resin degradation, and particularly discloses a degradation and recovery method of an epoxy resin pouring coil insulating material, which comprises the following steps: S1, putting the epoxy resin pouring coil insulating material into a blended mixed solvent for degradation; and S2, after the epoxy resin matrix is completely degraded, taking out the coil conductor, cleaning, drying and then recycling. According to the invention, a chemical degradation recovery method different from a traditional physical recovery method is adopted, so that the epoxy resin base of the epoxy resin cast coil insulating material is rapidly degraded in the mixed solvent, and the coil in the epoxy resin cast coil insulating material is recovered and put into secondary use. The method greatly reduces the manpower and material resource cost generated by the traditional recovery mode, reduces the pollution to the environment, simplifies the recovery process, ...

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Номер записи: 29
07-07-2023 дата публикации

Constant-temperature gas insulation equipment partial discharge simulation experiment equipment

Номер: CN116400174A
Автор: RAO XIAJIN, ZHANG LEI, ZHANG XIAOXING, PENG BOYA, LU YUFENG, SU YI, LI RUI
Принадлежит:

Constant-temperature gas insulation equipment partial discharge simulation experiment equipment is characterized by comprising a partial discharge simulation unit and a constant-temperature control unit, the partial discharge simulation unit comprises a closed discharge air chamber, a discharge device, a defect model device and a grounding device; the constant temperature control unit comprises a heat exchange pipeline, a constant temperature device and a temperature sensor; the partial discharge simulation unit is connected with the constant temperature control unit, a closed discharge air chamber of the partial discharge simulation unit is welded with a heat exchange pipeline of the constant temperature control unit, and a temperature sensor of the constant temperature control unit is arranged on the side surface of the closed discharge air chamber. According to the invention, a constant temperature environment is provided for the partial discharge simulation experiment of the gas insulation ...

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Номер записи: 30
27-06-2023 дата публикации

Electric power system fault recording device

Номер: CN116338251A
Автор: XIA XIAOFEI, FENG BO, SU YI, ZHU BANGCHAO, RAO XIAJIN, CHEN LIANGYUAN, PAN SHAOMING, LIU LEI, FAN CAIJIN, LI TIANWEI, WANG GUOLI
Принадлежит:

The invention discloses an electric power system fault recording device, and relates to the technical field of electric power facilities, the electric power system fault recording device comprises an oscillograph main body, the oscillograph main body is used for automatically and accurately recording change conditions of various electrical quantities before and after a fault when the electric power system has the fault, and a control area is arranged on the right side of the front surface of the oscillograph main body; the cover body comprises a cover body side hidden frame, a hidden cover plate, a movable lock catch, an auxiliary lock body and an elastic assembly. The fault recorder solves the problems that when a traditional fault recorder is used at present, in order to prevent excessive dust from falling on a control area of the fault recorder, the control area of the fault recorder needs to be covered with a cover plate, a traditional cover plate is fixedly connected to the fault recorder ...

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Номер записи: 31
23-05-2023 дата публикации

Carbon emission responsibility division method of interconnected power grid based on carbon emission flow

Номер: CN116151558A
Автор: SON JI-WON, PENG BOYA, ZHENG KUN, MENG XUANREN, LIU MOSI, HU HONG, LI MINGPO, SONG YI, RAO XIAJIN
Принадлежит:

The invention belongs to a low-carbon power system technology, and particularly relates to a carbon emission responsibility division method for an interconnected power grid based on a carbon emission flow, and the method comprises the following steps: S1, building an optimized operation model of an interconnected power system; s2, establishing an interconnected power system power flow decoupling algorithm; s3, calculating a tie line branch carbon flow rate vector according to a power system carbon emission flow theory; s4, according to a power system carbon emission flow theory, calculating a tie line branch network loss carbon flow rate; s5, establishing a network loss carbon flow rate bidirectional allocation model; and S6, establishing a carbon emission responsibility allocation model of the interconnected power system. According to the carbon emission flow-based carbon emission responsibility allocation method for the interconnected electric power system, the carbon emission responsibility ...

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Номер записи: 32
04-04-2023 дата публикации

Combination logic lookup table circuit

Номер: CN115913216A
Автор: CHEN LIANGYUAN, ZHOU KE, LI DAJIAN, ZHAO JIAN, ZHANG LEI, WANG XIAOMING, LI RUI, RAO XIAJIN, PAN SHAOMING
Принадлежит:

The invention discloses a combinational logic lookup table circuit which comprises a conversion array circuit used for converting m-bit lookup input signals into M-bit hot codes; the logic AND array is used for placing a two-input AND gate on any node in the M rows of signals and the N columns of signals; and the logic or operation circuit is used for carrying out or operation on any column of output logic of the logic and operation array. The lookup function is realized through a pure logic unit, the complexity of manufacturing, programming and devices is lower than that of a lookup table method in the prior art, meanwhile, the characteristics of simple storage and convenient operation are particularly remarkable due to the fact that a storage unit is saved, the cost is reduced, the lookup speed is high, and the lookup efficiency is high. And the on-line monitoring requirement of future intelligent hardware realization is met.

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Номер записи: 33
13-06-2023 дата публикации

Electric power and electric quantity balance optimization scheduling method and system

Номер: CN116260194A
Автор: PENG BOYA, SON JI-WON, LIU MOSI, SUN YAN, ZHENG KUN, LING WUNENG, LI MINGPO, RAO XIAJIN
Принадлежит:

The invention discloses an electric power and electric quantity balance optimization scheduling method and system. The method comprises the following steps: acquiring electric power system operation data and electric power system parameters; establishing a long-term optimization scheduling model in the system; establishing a system short-term optimization scheduling model; establishing a hybrid energy storage system charging and discharging scheduling model; inputting the operation data of the power system into the medium-and-long-term optimization scheduling model of the system; inputting the operation data of the power system into the system short-term optimization scheduling model; and inputting the operation data of the power system, the water and electricity distribution quantity and the charging and discharging strategies of the energy storage devices in the hybrid energy storage system into the charging and discharging scheduling model of the hybrid energy storage system. According ...

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Номер записи: 34
05-05-2023 дата публикации

Method for calculating areas of air inlet and air outlet of dry-type transformer under sunshine

Номер: CN116070418A
Автор: RAO XIAJIN, LI DAJIAN, LIU PENG, HAN FANGYUAN, PENG BOYA, CHEN LIANGYUAN
Принадлежит:

The invention relates to the technical field of dry-type transformers, and particularly discloses a method for calculating the air inlet and outlet area of a dry-type transformer in a sunshine environment, namely calculating the air inlet and outlet area of the dry-type transformer according to the annual average sunshine duration, average sunshine intensity, average sunshine area and average air inlet and outlet temperature difference of the dry-type transformer. The sum of heat generated by the area of the part shielded by the sun shield, heat generated by the part not shielded by the sun shield and heat generated by operation of the dry-type transformer is calculated, and then the area of the air inlet and the air outlet of the shell is calculated through the total heat generated by the dry-type transformer. The calculation method provided by the invention overcomes the defect that the traditional calculation method does not consider the sunshine temperature rise influence, provides ...

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Номер записи: 35
04-04-2023 дата публикации

Power transformer temperature fault monitoring method and system

Номер: CN115900997A
Автор: CHEN LIANGYUAN, LI DAJIAN, ZHOU KE, ZHAO JIAN, ZHANG LEI, WANG XIAOMING, YU CHANGTING, LI RUI, RAO XIAJIN, PAN SHAOMING
Принадлежит:

The invention discloses a power transformer temperature fault monitoring method and system. The method comprises the following steps: measuring the temperature of an oil inlet pipeline and an oil outlet pipeline in a transformer cooling system by adopting a conical optical fiber; a speed sensor is adopted to measure the oil flow velocity on the oil inlet pipeline and the oil outlet pipeline, and a flow velocity parameter used for assisting the temperature as a decision basis is obtained; a GBDT diagnosis module is adopted, data measured by the conical optical fiber and the speed sensor serve as the input of the GBDT diagnosis module, and the winding hot-spot temperature of the transformer serves as the output of the GBDT diagnosis module. According to the invention, the temperature of the oil inlet pipeline and the oil outlet pipeline is measured through the conical optical fiber, the velocity of the oil flow velocity in the oil inlet pipeline and the oil outlet pipeline is measured through ...

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Номер записи: 36
29-08-2023 дата публикации

SF6 decomposed component detection device and detection method based on plasma resonance spectrum

Номер: CN116660180A
Автор: LU YUFENG, SU YI, XIA XIAOFEI, ZHANG LEI, HAN FANGYUAN, RAO XIAJIN
Принадлежит:

The invention discloses a plasma resonance spectrum-based SF6 decomposed component detection device and a detection method, the plasma resonance spectrum-based SF6 decomposed component detection device comprises a shell, a gas tank is arranged in the shell, one end of the gas tank is connected with an SMA optical fiber quick connector, the other end of the SMA optical fiber quick connector is connected with a one-to-two coupler, and the one-to-two coupler is connected with a gas tank. The other end of the one-to-two coupler is connected with a buncher and a spectrograph, the other end of the buncher is connected with a multi-color light source, the other end of the multi-color light source is connected with a light source driver, the other end of the light source driver is connected with a controller, and the other end of the spectrograph is connected with the controller. According to the invention, the decomposition condition of the SF6 to-be-detected gas is effectively determined by detecting ...

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Номер записи: 37
07-04-2023 дата публикации

Oiled paper capacitive bushing fault detection system and method

Номер: CN115932492A
Автор: SU YI, XIA XIAOFEI, HAN FANGYUAN, LI DAJIAN, LU YUFENG, ZHANG LEI, CHEN LIANGYUAN, RAO XIAJIN, PAN SHAOMING, LI RUI
Принадлежит:

The invention belongs to the field of electric power, and particularly relates to an oiled paper capacitive bushing fault detection system and method, and the system comprises an ultrahigh frequency sensor, a pressure sensor, a signal detection module, a signal transmission module, a power module and a data display terminal. The ultrahigh frequency sensor and the pressure sensor are distributed and connected with the signal detection module; the signal detection module is connected with the data display terminal through the signal transmission module; and the power supply module is used for supplying energy. The oil paper capacitor type bushing fault detection system can detect the internal pressure and the partial discharge signal intensity of an insulating bushing, and compares the internal pressure and the partial discharge signal intensity established by a large number of sample learning. Therefore, whether the insulating sleeve has a defect or not and the type of the defect under the ...

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Номер записи: 38
23-06-2023 дата публикации

Device and method for detecting decomposed components of sulfur hexafluoride

Номер: CN116297278A
Автор: LU YUFENG, SU YI, XIA XIAOFEI, RAO XIAJIN, LI RUI, ZHANG YUBO
Принадлежит:

The invention discloses a sulfur hexafluoride decomposition component detection device and method, and relates to the technical field of electrical equipment gas detection. The device comprises an ultraviolet light source and a fluorescent light source, light beams emitted by the ultraviolet light source and the fluorescent light source are coupled through an optical fiber coupler, the output end of the optical fiber coupler is connected with a multimode optical fiber, and the coupled light beams are transmitted to a gas detection pool through the multimode optical fiber; a detector, a photoelectric conversion unit, an optical fiber amplifier and a beam splitter are arranged in the gas detection pool. The device provided by the invention can filter out a narrow-band spectrum through the filtering effect of the gas buffer pool and the optical filter, so that the interference of absorption of other components in the to-be-detected gas is avoided; meanwhile, the detector and the optical fiber ...

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Номер записи: 39
25-04-2023 дата публикации

Method for comprehensively evaluating epoxy resin state of dry-type transformer based on fuzzy analytic hierarchy process

Номер: CN116010887A
Автор: RAO XIAJIN, ZHANG LEI, PENG BOYA, CHEN LIANGYUAN, LU YUFENG, SU YI, HUANG WEI
Принадлежит:

The invention belongs to the technical field of electrical equipment state evaluation, and particularly discloses a method for comprehensively evaluating the state of epoxy resin of a dry-type transformer based on fuzzy analytic hierarchy process, which comprises the following steps of: constructing primary indexes and secondary indexes of epoxy resin, and respectively normalizing quantitative indexes and qualitative indexes in the primary indexes and the secondary indexes; comparing the indexes of the same type pairwise, establishing a fuzzy judgment matrix and performing consistency check, and creating a weight set W of the epoxy resin based on fuzzy analytic hierarchy process after the check is passed; and based on the weight set W and the normalized index parameters, scoring the working state of the epoxy resin. According to the method provided by the invention, the working state of the epoxy value in the dry-type transformer can be comprehensively evaluated, and potential safety hazards ...

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Номер записи: 40
07-04-2023 дата публикации

Dry-type transformer partial discharge detection method integrating ultrahigh frequency and ultrasonic waves

Номер: CN115932508A
Автор: HUANG WEI, RAO XIAJIN, HAN FANGYUAN, PENG BOYA, CHEN LIANGYUAN, LU YUFENG, SU YI
Принадлежит:

The invention relates to the technical field of dry-type transformer discharge detection, in particular to a dry-type transformer partial discharge detection method integrating ultrahigh frequency and ultrasonic waves, which comprises the steps that three groups of sensors surrounding a dry-type transformer are arranged, and each sensor group comprises an ultrasonic wave sensor and an ultrahigh frequency sensor; a three-dimensional space rectangular coordinate system including the sensor and the dry-type transformer is constructed, the distance from partial discharge to a sensor group is calculated by calculating the time difference between ultrasonic waves and signals received by an ultrahigh frequency sensor when partial discharge occurs, the position of the partial discharge is calculated through a three-ball positioning method, and in order to reduce errors, the position of the partial discharge is calculated. And measuring for multiple times and optimizing coordinates on matlab based ...

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Номер записи: 41
23-06-2023 дата публикации

Sulfur dioxide gas detection device and method based on ultraviolet absorption spectrum

Номер: CN116297277A
Автор: LU YUFENG, SU YI, XIA XIAOFEI, RAO XIAJIN, LI RUI, ZHANG YUBO
Принадлежит:

The invention discloses a sulfur dioxide gas detection device and method based on an ultraviolet absorption spectrum, and relates to the technical field of gas detection. The device comprises an ultraviolet light source and an optical fiber circulator, the optical fiber circulator is respectively provided with a first port, a second port and a third port, optical signals are transmitted preferentially in the optical fiber circulator according to the sequence of the first port, the second port and the third port, the ultraviolet light source is connected with the first port through an optical fiber, and the optical fiber circulator is connected with the second port through an optical fiber. The third port is connected with a spectrograph through an optical fiber, the second port is connected with a gas absorption cell through an optical fiber, the gas absorption cell is connected with a photoelectric detector through an optical fiber, and the photoelectric detector is connected with an upper ...

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Номер записи: 42
07-07-2023 дата публикации

Frequency domain power cable defect detection method based on EWT

Номер: CN116400166A
Автор: PAN SHAOMING, ZHAO JIAN, SU YI, ZHANG YIYI, FENG BO, ZHANG LEI, HAN FANGYUAN, LI RUI, CHEN LIANGYUAN, ZHANG LONGFEI, LU YUFENG, RAO XIAJIN, TANG JIE
Принадлежит:

The invention belongs to the technical field of power equipment state monitoring and fault diagnosis, and particularly relates to an EWT-based frequency domain power cable defect detection method, which comprises the following steps of: inputting an FDR signal to detect a cable; the FDR signal after detection is decomposed; performing correlation analysis on the modal component of the decomposed signal and the FDR signal, setting a threshold value, and reconstructing the decomposed FDR signal at the same time; and carrying out influence elimination processing on the reconstructed FDR signal to eliminate spectrum leakage and a fence effect generated in an FFT process so as to obtain a cable defect detection result. According to the method, the Fourier spectrum characteristics can be utilized, harmonic waves with different frequencies in complex signals can be effectively separated, the influence of mode aliasing is overcome, and the requirement of multi-component signal decomposition is ...

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Номер записи: 43
15-08-2023 дата публикации

Transformer bushing discharge defect diagnosis method for optimizing PNN based on crow search

Номер: CN116595405A
Автор: SU YI, HAN FANGYUAN, XIA XIAOFEI, ZHANG LEI, CHEN LIANGYUAN, LI DAJIAN, LU YUFENG, RAO XIAJIN, PAN SHAOMING, LI RUI
Принадлежит:

The invention discloses a transformer bushing discharge defect diagnosis method for optimizing PNN based on graffiti search. The method comprises the following steps: acquiring waveform data of partial discharge of a transformer bushing, extracting feature parameters from the waveform data, constructing feature vectors, and dividing the feature vectors into training feature vectors and test feature vectors; a CSA-PNN diagnosis model is constructed in combination with the feature vectors, and the CSA-PNN diagnosis model outputs the discharge type of the transformer bushing; and inputting the test feature vector into a CSA-PNN diagnosis model to carry out discharge type diagnosis. The smooth factor in the PNN is optimized through the Ucrow search algorithm, the problem that the smooth factor of the traditional random PNN algorithm is difficult to select is solved, and the efficiency of training the PNN diagnosis model and the accuracy of using the PNN diagnosis model to identify the discharge ...

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Номер записи: 44
11-08-2023 дата публикации

Cable defect positioning method based on broadband impedance spectrum and self-attention mechanism coupling

Номер: CN116577602A
Автор: PAN SHAOMING, ZHAO JIAN, SU YI, ZHANG YIYI, FENG BO, ZHANG LEI, HAN FANGYUAN, LI RUI, CHEN LIANGYUAN, ZHANG LONGFEI, LU YUFENG, RAO XIAJIN, TANG JIE
Принадлежит:

The invention relates to the technical field of power equipment state monitoring and fault diagnosis, and particularly discloses a cable defect positioning method based on broadband impedance spectroscopy and self-attention mechanism coupling, comprising the following steps: S1, constructing a data set; s2, constructing a space channel attention module; s3, constructing a convolutional feature extraction network CNN; s4, constructing a multi-layer full-connection network; and S5, establishing a loss function, starting training based on the data set, the model and the loss function, and establishing a corresponding cable single defect prediction model. According to the method, the space attention module and the channel attention module are fused with the convolutional neural network, so that the defect feature extraction capability of the model is enhanced, and the defect position positioning precision of the model is further improved.

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Номер записи: 45
30-05-2023 дата публикации

Epoxy resin transformer maintenance clamp

Номер: CN116175624A
Автор: MA SHOUXIAO, HUANG WEI, RAO XIAJIN, PENG BOYA, LI DAJIAN, ZHANG LEI, CHEN LIANGYUAN, LU YUFENG, SU YI, XIA XIAOFEI
Принадлежит:

The invention discloses an epoxy resin transformer maintenance clamp, and relates to the technical field of transformer maintenance instruments. The clamp comprises a mechanical clamp, a rotating mechanism, a multi-section folding mechanism and a fixing structure. The clamp is compact in structure, light in weight, high in flexibility and expandability, suitable for various complex conditions and capable of being externally connected with other tools to be used in cooperation with maintainers; the clamping structure adopts a four-bar mechanism, and has higher stability and accuracy and higher reliable efficiency.

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Номер записи: 46
16-03-2023 дата публикации

Screening method for adsorbent in environment-friendly gas-insulating equipment

Номер: US20230081241A1
Автор: Dajian Li, Fangyuan HAN, Shuangshuang Tian, Wei Zhang, Xiajin Rao, Xiaoxing Zhang, Yuandong Jiang
Принадлежит: Guangxi Power Grid Co Ltd, HUBEI UNIVERSITY OF TECHNOLOGY, Xiangyang Industrial Institute Of Hubei University Of Technology

Disclosed is a screening method for adsorbent in environment-friendly gas-insulating equipment, the method steps include: establishing screening sets, pre-experiment screening, standard gas adsorption experiments screening, mixed gas adsorption experiments screening, establishing mapping relationship between the decomposed gas type set and the third adsorbent type set under different working conditions, and selecting adsorbent combination mode suitable for the working condition type and the mixed gas composition mode based on the mapping relationship. Through adsorption experiments of a single standard gas and a mixed gas under different working conditions, an adsorbent combination mode suitable for adsorbing mixed decomposed gas under different working conditions is obtained; at the same time, in view of the situation that the suitable adsorbent has not been screened through the adsorption experiment, the suitable adsorbent is further screened with the molecular dynamics theory, so that all the adsorbent combinations suitable for different working conditions can be obtained.

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Номер записи: 47