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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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Применить Всего найдено 36. Отображено 36.
08-08-2023 дата публикации

Method and system for evaluating aging resistance of cable metal sheath protector

Номер: CN116559571A
Автор: LIU DANBING, HU XINXIN, WANG YADI, YI YINXIANG, CHEN LIN, LI WENBO, YE YUTING, LI YILIN, WU SIHENG, LI DI, CHEN ZHAOWEI, HUANG JIAMING, LI HUIHONG, ZHU WUZHOU, LIAO YANQUN
Принадлежит:

The invention relates to the technical field of cable device quality assessment, and discloses a cable metal sheath protector aging resistance assessment method and system, and the method comprises the steps: applying a DC aging voltage to a cable metal sheath protector, and determining a ZnO voltage-sensitive ceramic section sample containing a crystal boundary; according to the method, deep etching is carried out on a ZnO pressure-sensitive ceramic section sample containing the grain boundary in the grain boundary depth direction to obtain content distribution of grain boundary oxygen under different etching depths, so that the proportion of the grain boundary oxygen etched for the first time is determined, and the aging resistance of the cable metal sheath protector is evaluated according to the size of the proportion of the grain boundary oxygen etched for the first time, so that the aging resistance of the cable metal sheath protector is evaluated. Therefore, the aging resistance of ...

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Номер записи: 1
04-08-2023 дата публикации

Power supply switching method and system for intelligent soft switch and parallel interconnection switch

Номер: CN116544948A
Автор: HE ZHIPENG, CHEN YONG, CHEN JIANFU, YANG RUIXIONG, LI WEIWEI, XU SHUKAI, LI YAN, YU SONGTAO, WEI TIANLIU, LI WENHUI, ZHAO JIA, ZHAO XIAOYAN, CAO JIAN, CHENG XU, WU HONGYUAN, BAE SUNG-WOO, LI JIANBIAO, LIAO YANQUN
Принадлежит:

The invention discloses a power supply switching method and system for an intelligent soft switch and a parallel connection interconnection switch, and the method comprises the steps: judging whether any phase voltage of the single-phase voltage of a power grid corresponding to a fault port exceeds a rated voltage peak value or not when an isolated signal is received, and generating a third judgment result; and according to the third judgment result, the voltage phase and the voltage frequency corresponding to the fault port are adjusted to be consistent with those of the to-be-switched port, the parallel interconnection switch corresponding to the fault port is closed, the converter corresponding to the fault port is switched to be in a preset control mode, and power supply switching completion information is generated. The technical problem of high investment cost in the prior art is solved. Through a three-port intelligent soft switch and parallel connection switch rapid power supply ...

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Номер записи: 2
07-07-2023 дата публикации

Method for measuring phase current of three-core cable based on tweezers-shaped Hall array and storage medium

Номер: CN116400119A
Автор: WANG HANG, HUANG BING, LIAO YANQUN, SHAO TAO, LIU YUSHUN, YANG LEZHI
Принадлежит:

The invention discloses a method for measuring the phase current of a three-core cable based on a tweezers-shaped Hall array and a storage medium, and the method comprises the steps: setting six measurement points on the surface and the periphery of the three-core cable, so as to build a three-core cable magnetic field theory sensing model; deriving a transfer function between the phase current of the three-core cable and the magnetic induction intensity at the six measurement points by adopting the Ampere circuital theorem according to the three-core cable magnetic field theory sensing model, and obtaining a nonlinear overdetermined equation set; acquiring magnetic induction intensity measurement data of the six measurement points, and constructing an objective function according to the magnetic induction intensity measurement data and the nonlinear overdetermined equation set; and performing optimization calculation on the target function by adopting a differential evolution algorithm ...

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Номер записи: 3
05-05-2023 дата публикации

Load flow calculation method and device for voltage active support mixing system, terminal and medium

Номер: CN116073390A
Автор: CAI ZHONGQI, YANG KUN, LI ZHENCONG, PENG SUI, GAN DESHU, GU YANXUN, BAE SUNG-WOO, OU ZHONGXI, LIAO YANQUN, XING XUBIN, LIU CHAO
Принадлежит:

The invention discloses a load flow calculation method and device for a voltage active support frequency mixing system, a terminal and a medium. According to the scheme provided by the invention, VQ droop control logic is set under a PQ control strategy, so that a node reactive output given value is associated with a node voltage; the reactive power output value of the frequency conversion station is no longer a fixed value but actively changes along with the change of the node voltage, so that the layout of the reactive power output of a plurality of frequency conversion stations is adjusted, the voltage stability is improved, the active and reactive power loss of a line is reduced, and the voltage support effect of the frequency conversion station is improved. The power flow result obtained through calculation can be closer to actual power flow distribution, and the technical problem that existing power flow calculation is low in accuracy is solved.

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Номер записи: 4
07-04-2023 дата публикации

Submarine cable partial discharge quantity inversion method and device based on distributed optical fiber temperature measurement

Номер: CN115932498A
Автор: LIAO YANQUN, NAN BAOFENG, CAO ANYING, TANG JIE, XIAO JIXIONG, HE WEI, WANG HANG, CUI JIANGJING, WU HONGXIAO, LI DI, YANG SHUAI, LIN MINHONG, ZHU WUZHOU, SUN TINGXI, SONG WEIJIE, HU XINXIN, HUANG JIAMING
Принадлежит:

The invention relates to the technical field of cable partial discharge detection, and discloses a submarine cable partial discharge quantity inversion method and device based on distributed optical fiber temperature measurement. The method comprises the following steps: obtaining a first target fitting curve of submarine cable sheath surface temperature distribution characteristics along with time change under different partial discharge source parameters based on partial discharge test data; enabling the partial discharge source to be equivalent to a heat source, and constructing a second target fitting curve of the submarine cable sheath surface temperature distribution characteristics along with the time change under different heat source parameters based on the simulation data of the surface temperature distribution characteristics of the optical fiber unit and the submarine cable sheath temperature distribution characteristics under different equivalent heat powers; and fitting each ...

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Номер записи: 5
04-04-2023 дата публикации

Direct current building energy management optimization method

Номер: CN115912424A
Автор: LI JIANBIAO, CHEN JIANFU, TANG JIE, CHEN YONG, BAE SUNG-WOO, YANG RUIXIONG, CHENG XU, WU HONGYUAN, LI WENHUI, HUANG YIPENG, LI ZHENCONG, LIN MINHONG, LIAO YANQUN, CHEN TAO, ZOU GUOHUI, GAO YING, ZENG JIE, LU ZIKAI, ZHANG YIMIN, ZHAO XIAOYAN
Принадлежит:

The invention provides a direct current building energy management optimization method, and belongs to the technical field of power distribution network energy management. According to the method, Markov decision process modeling is carried out on energy optimization operation of the direct-current building, and meanwhile, a DDPG algorithm is adopted for solving the established direct-current building optimization model. In consideration of the defects of a traditional DDPG algorithm, the randomness and blindness of learning and exploring of the DDPG algorithm in a direct current micro-grid operation environment are reduced by adopting a priority experience playback mechanism based on a time sequence difference error (TD-error) in the solving process of the DDPG algorithm, and the convergence speed of an energy optimization management strategy in the method is improved. Meanwhile, an excellent round set of energy management of the direct-current building system is constructed between algorithm ...

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Номер записи: 6
16-05-2023 дата публикации

Virtual impedance design method and system considering high-precision power output of inverter

Номер: CN116127704A
Автор: CHEN JIANFU, LI JIANBIAO, TANG JIE, CHEN YONG, BAE SUNG-WOO, YANG RUIXIONG, CHENG XU, WU HONGYUAN, CAO ANYING, HE WEI, LIN MINHONG, LIAO YANQUN, CHEN TAO, GAN DESHU, ZOU GUOHUI, GAO YING, ZENG JIE, LU ZIKAI, ZHANG YIMIN, ZHAO XIAOYAN
Принадлежит:

The invention provides a virtual impedance design method and system considering high-precision power output of an inverter, and is suitable for a capacitive coupling inverter. The method comprises the following steps: firstly, selecting an equivalent coupling impedance boundary according to an active power output limit value calculated by physical impedance; secondly, adding an inner boundary and an outer boundary which meet the transient response requirement, and narrowing the selection range of virtual impedance; further, a stability margin parameter is introduced, the stability boundary of the coupling impedance is derived, and the selection range of the virtual impedance is further narrowed; secondly, considering possible power loss, and taking a range in which the equivalent impedance approaches zero as a feasible range of the equivalent coupling impedance; and finally, a virtual impedance value is obtained by using a difference value between the physical impedance and the equivalent ...

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Номер записи: 7
07-04-2023 дата публикации

Double-ring electromagnetic magneto-optical hybrid current transformer

Номер: CN115932364A
Автор: WANG HANG, CHI NAZE, XU ZHUOLI, LIU FUYUAN, CAO MUYAN, DING WENFANG, LIAO YANQUN, YUAN LEI, JIANG YUNHAO, XU ANFEI, YANG LEZHI
Принадлежит:

The invention belongs to the technical field of current measurement, and discloses a double-ring electromagnetic magneto-optical hybrid current transformer, which comprises an electromagnetic current transformer and a photoelectric mutual inductance unit, and is characterized in that the photoelectric mutual inductance unit comprises a first photoelectric current transformer and a second photoelectric current transformer; a test cable penetrates through the center of an annular iron core of the electromagnetic current transformer, and two probes corresponding to the two photoelectric current transformers are installed on the annular iron core and symmetrically arranged on the two sides of the test cable in parallel. The electromagnetic current transformer is used for measuring and obtaining steady-state current information of the test cable, and the photoelectric mutual inductance unit is used for measuring and obtaining transient-state current information of the test cable. According to ...

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Номер записи: 8
02-05-2023 дата публикации

Power frequency power grid reliability evaluation method and system considering offshore wind power frequency division access

Номер: CN116050306A
Автор: YANG KUN, CAI ZHONGQI, CHEN JIANFU, GAN DESHU, PENG SUI, GU YANXUN, BAE SUNG-WOO, OU ZHONGXI, LIAO YANQUN, XING XUBIN, LIU CHAO
Принадлежит:

The invention discloses a power frequency power grid reliability evaluation method and system considering offshore wind power frequency division access, and the method comprises the steps: employing a time division method, calculating the output of an offshore wind power plant fan in each time period according to the wind speed and wind direction probability distribution in each time period, calculating the grid-connected output distribution of a frequency division side in each time period through combining with the available capacity of each subsystem, and obtaining the reliability of a power frequency power grid. A frequency division side equivalent port model is obtained, simplified modeling of the frequency division side is achieved, then the frequency division side equivalent port model is connected into a power frequency power grid, time sequence Monte Carlo simulation is conducted on the power frequency power grid, and the reliability index of the power frequency power grid is counted ...

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Номер записи: 9
28-07-2023 дата публикации

Submarine cable local defect identification method and device

Номер: CN116502051A
Автор: LIAO YANQUN, NAN BAOFENG, XIAO JIXIONG, CAO ANYING, WANG HANG, YANG SHUAI, HE WEI, HUANG SHUNTAO, LIN CUITING, LIN MINHONG, LI DI, CUI JIANGJING, ZHU WUZHOU, WU HONGXIAO, HUANG JIAMING, HU XINXIN, CHEN ZHAOWEI
Принадлежит:

The invention relates to the technical field of submarine cable operation and maintenance, in particular to a submarine cable local defect identification method and device. Comprising the following steps: acquiring multiple groups of characteristic signals corresponding to local defects of different submarine cables; preprocessing each group of feature signals to obtain a plurality of groups of reduced feature signals; constructing an initial defect recognition model based on a two-dimensional convolutional neural network and a support vector base classifier; performing training operation and verification operation on the initial defect recognition model according to the multiple groups of reduced feature signals to obtain a defect recognition model; performing defect identification on a to-be-identified submarine cable according to the defect identification model; according to the method, the development condition, defect types and the like of partial discharge can be effectively recognized ...

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Номер записи: 10
15-08-2023 дата публикации

Method and system for optimizing droop coefficient of direct-current power distribution network

Номер: CN116599114A
Автор: CHEN YONG, YANG RUIXIONG, ZHAO XIAOYAN, CHEN JIANFU, ZHONG HUIFENG, BAE SUNG-WOO, LI JIANBIAO, CHENG XU, WU HONGYUAN, ZHENG LINSHENG, GU YANXUN, CAO JIAN, CHEN JIANDIAN, LIAO YANQUN, YU SONGTAO, LI WEIWEI, QIAO XUEBO
Принадлежит:

The invention relates to the technical field of droop control of a direct-current power distribution network, in particular to a droop coefficient optimization method and system of the direct-current power distribution network. Comprising the following steps of: optimizing a small signal state space model by taking maximum damping ratio and maximum stability margin as targets and taking small disturbance stability constraint, node voltage constraint and converter power constraint as constraint conditions to obtain an optimization model of a droop coefficient; solving the optimization model of the droop coefficient through a genetic algorithm to obtain an optimization result of the droop coefficient; while droop control power distribution is realized, the voltage level of the system is ensured, the stability of the system is also improved, and the problem of poor power supply quality of a direct current power distribution network adopting droop control at present is effectively solved.

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Номер записи: 11
23-06-2023 дата публикации

Self-adaptive optimization design method for primary topology of power distribution and utilization system of building

Номер: CN116316743A
Автор: LI JIANBIAO, CHEN JIANFU, TANG JIE, CHEN YONG, CHEN XIA, LI WEIWEI, CAO ANYING, LI ZHENCONG, ZOU GUOHUI, BAE SUNG-WOO, YANG RUIXIONG, CHENG XU, WU HONGYUAN, LI WENHUI, LIU RENLIANG, LUO KE, HE WEI, LIN MINHONG, LIAO YANQUN, JIANG LIN
Принадлежит:

The invention provides a primary topology self-adaptive optimization design method for a power distribution and utilization system of a building, which comprises the following steps: firstly, acquiring a design boundary of the power distribution and utilization system, then automatically matching the design boundary with data associated with a typical standardized database and exporting, and then determining a basic topology according to the data and the design boundary. Based on photovoltaic and load matching degree analysis, photovoltaic, load and energy storage are placed on the basic topology, and a power flow simulation calculation model of the'source storage direct current flexible charging 'power distribution and utilization system is initialized; an energy storage, converter and load configuration multi-objective optimization model considering energy conservation, carbon reduction and economy is constructed, energy storage, converter and direct current load (position, alternating ...

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Номер записи: 12
18-07-2023 дата публикации

Connected wave power generation device

Номер: CN116447067A
Автор: WU HONGYUAN, ZOU GUOHUI, LI ZHENCONG, WANG HONGXING, CHEN JIANFU, CHEN YONG, BAE SUNG-WOO, LIAO YANQUN, CHENG XU, LI JIANBIAO, YANG RUIXIONG, WEI YAN, LIU ZHENGUO, CAO YANCHAO
Принадлежит:

The invention relates to the technical field of ocean wave energy utilization, in particular to a one-piece wave energy power generation device which comprises an underwater floating body, a floater component, a plurality of anchor blocks, anchor chains and a power generation component, a through hole is formed in the underwater floating body, the floater component is slidably mounted in the through hole, the anchor blocks are fixed in the ocean, the anchor chains are arranged between the anchor blocks and the underwater floating body, and the power generation component is connected with the power generation component. The power generation component comprises a power generation coil and a magnet, the power generation coil is wound on the inner wall of the floater component, the magnet is arranged on the inner wall of the through hole, a sealing device is arranged between the floater component and the underwater floating body, and when the floater component vertically swings along the axis ...

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Номер записи: 13
24-02-2016 дата публикации

Low -voltage distribution power status display device

Номер: CN0205051438U
Автор: ZHU WUZHOU, LIAO YANQUN, LU ZHIHUA, ZENG YOUMING, LI DI, HUANG JIAMING, HU XINXIN, LIU DANBING, YE YUTING, LIU MIN
Принадлежит:

The utility model provides a low -voltage distribution power status display device, including voltage state acquisition module, microcontroller module and SMS communication module, voltage state acquisition module is connected with the microcontroller module, SMS communication module is connected with the microcontroller module, the utility model discloses an each low voltage distribution system of voltage state acquisition pair of module carries out voltage signal and gathers to the voltage signal that will gather converts data signal into, the microcontroller module is received data signal will reflect that SMS communication module is given to the signal transmission of low voltage distribution system tripping operation, and SMS communication module sends the alarm information of concrete regional electrical power generating system tripping operation to fortune dimension personnel's mobile terminal. Consequently, can, low voltage distribution system send and report an emergency and ask ...

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Номер записи: 14
18-07-2023 дата публикации

Zinc oxide ceramic resistor in-situ monitoring method based on direct current conductive activation energy

Номер: CN116448805A
Автор: LIU DANBING, ZHU WUZHOU, HUANG JIAMING, HU XINXIN, WANG YADI, CHEN ZHAOWEI, LI WENBO, YE YUTING, WU SIHENG, LI YILIN, CHEN LIN, YI YINXIANG, LIAO YANQUN, LI DI, LI ZHIYU, ZHUO ZHIHAO, WANG QIANG, LI HUIHONG
Принадлежит:

The invention belongs to the technical field of ceramic resistors, and particularly relates to a zinc oxide ceramic resistor in-situ monitoring method based on direct current conductive activation energy. The method comprises the following steps of: calculating direct-current conductance activation energy of a heating stage and a cooling stage in a sintering process of the zinc oxide ceramic resistor through temperatures and direct-current conductance of the heating stage and the cooling stage in the sintering process of the zinc oxide ceramic resistor; therefore, the densification and grain boundary barrier forming process in the heating stage and the cooling stage in the sintering process of the zinc oxide ceramic resistor can be visually monitored, and the technical problem that monitoring means in the sintering process of the zinc oxide ceramic resistor are lacked in the prior art is solved.

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Номер записи: 15
04-07-2023 дата публикации

Linear zinc oxide ceramic resistor, preparation method thereof and circuit board

Номер: CN116386967A
Автор: ZHU WUZHOU, LIAO YANQUN, LI DI, LI ZHIYU, ZHUO ZHIHAO, WANG QIANG, LIU DANBING, LI HUIHONG, HUANG JIAMING, HU XINXIN, WU SIHENG, CHEN ZHAOWEI, LI WENBO, YE YUTING, WANG YADI, LI YILIN, CHEN LIN, YI YINXIANG
Принадлежит:

The invention belongs to the technical field of ceramic resistors, and particularly relates to a linear zinc oxide ceramic resistor, a preparation method thereof and a circuit board. In the preparation process of the linear zinc oxide ceramic resistor provided by the invention, direct-current voltage is applied to destroy the formation of a grain boundary barrier in the sintering process, so that the product zinc oxide ceramic resistor has a good linear characteristic, and the linear zinc oxide ceramic resistor is prepared; therefore, the technical problem that the process of preparing the zinc oxide linear ceramic resistor in the prior art is relatively complex is solved.

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Номер записи: 16
18-02-2015 дата публикации

Cable insulating layer specimen cutting device and cutting method

Номер: CN104359708A
Автор: ZHANG YUNZHOU, XU YANG, SUN TINGXI, LIAO YANQUN, LUO PAN, LU ZHIHUA, ZHU WUZHOU, LI JINGFEI
Принадлежит:

The invention discloses a cable insulating layer specimen cutting device and cutting method. The device comprises a blade, a fixed shaft and a fixed base, wherein the fixed shaft comprises a first assembly section and a second assembly section which are connected with each other; the first assembly section is connected with a rotating shaft of a lathe, and the second assembly section is sleeved with a cable insulating layer specimen; the fixed base is arranged on the lathe, a blade groove matched with the blade is formed in the fixed base, the blade is fixedly arranged in the blade groove, and the edge of the blade is parallel to the axial direction of the fixed shaft. Along with rotation of the cable insulating layer specimen, the blade approaches the surface of the cable insulating layer specimen and cuts along the perimeter direction of the specimen to obtain a specimen slice, so that the inner, middle and outer layers of the cable insulating layer specimen can be definitely separated ...

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Номер записи: 17
07-07-2023 дата публикации

Interphase current sharing control method and device for three-phase resonant converter

Номер: CN116404882A
Автор: CHENG XU, WU YUE, CHEN YONG, ZHOU YUEBIN, CHEN JIANFU, LI WEIWEI, ZOU GUOHUI, BAE SUNG-WOO, YANG RUIXIONG, LI JIANBIAO, WU HONGYUAN, ZHAO XIAOYAN, LIU YAO, LIAO YANQUN
Принадлежит:

The invention discloses an inter-phase current-sharing control method and device for a three-phase resonant converter, and the method comprises the steps: collecting the actual data of the three-phase current of the three-phase resonant converter, decomposing the negative sequence quantity of the three-phase current in a dq coordinate system through a series of conversion and processing, and carrying out the calculation of the negative sequence quantity of the three-phase current in the dq coordinate system; and then the module length parameter of the negative sequence quantity is calculated, an obtained value is sent to the negative end of the PI controller, an angle control value obtained through calculation is sent to a control circuit, and closed-loop three-phase current sharing control can be realized by performing phase shifting processing on three phases, so that the control efficiency is improved.

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Номер записи: 18
12-03-2014 дата публикации

Cable partial discharge live correction method

Номер: CN103630803A
Автор: XU YANG, GU XIAO, WANG TIAN, SUN TINGXI, ZHANG YUNZHOU, LIAO YANQUN
Принадлежит:

The invention discloses a cable partial discharge live correction method which comprises the following steps of: winding a copper electrode of a first capacitive coupling sensor B1 and a copper electrode of a second capacitive coupling sensor B2 on cable outer semi-conducting layers at both ends of a cable joint and then respectively connecting a first impedance and a second impedance in parallel at both ends of a cable; generating a plurality of first pulse step signals by a signal generator, inputting the first pulse step signals into the first capacitive coupling sensor B1, acquiring corresponding first detection signals by the second capacitive coupling sensor B2 and then according to the first pulse step signals and the first detection signals, obtaining a first correction coefficient of the cable; according to the first correction coefficient of the cable, obtaining a cable end part correction circuit by a simulation method; then according to the cable end part correction circuit, ...

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Номер записи: 19
08-08-2023 дата публикации

Safety monitoring system and method for electric vehicle charging station

Номер: CN116552305A
Автор: CHENG XU, CHEN YONG, CHEN JIANFU, ZOU GUOHUI, BAE SUNG-WOO, YANG RUIXIONG, LI JIANBIAO, WU HONGYUAN, ZHAO XIAOYAN, LIU YAO, LIAO YANQUN
Принадлежит:

The invention discloses an electric vehicle charging station safety monitoring system and method, and the system comprises a charging station safety management and control cloud platform, a charging pile state early warning unit, and a charging station video monitoring unit. The charging pile state early warning unit and the charging station video monitoring unit are embedded into a deep learning algorithm and used for achieving real-time early warning and prediction of the state of the charging pile and real-time monitoring and recognition of the abnormal state of the charging station, a traditional manual real-time video monitoring method is replaced, a dangerous source close to the charging station is recognized in real time with the help of the deep learning theory, and real-time monitoring of the charging station is achieved. And when it is detected that a dangerous source approaches the charging station or the charging pile runs abnormally, the electric vehicle charger in the charging ...

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Номер записи: 20
04-07-2023 дата публикации

Single-core cable characteristic impedance measuring clamp, measuring system and measuring method

Номер: CN116381292A
Автор: CUI JIANGJING, CAI WEI, LI TIANSHU, ZHU ZILONG, HUANG BINGQUAN, JIANG ZHIBIN, LI HAISHEN, LIAO YANQUN, FANG YIZHI, OU LIYE
Принадлежит:

The invention discloses a single-core cable characteristic impedance measurement clamp, a measurement system and a measurement method, an inner conductor and an outer conductor form a horn-shaped coaxial structure, a preset gap is reserved between the inner conductor and the outer conductor, and the preset gap is filled with an insulating medium; the inner conductor comprises a connecting column, a trumpet-shaped inner core and an inner bayonet used for clamping a cable core in a clearance fit mode which are integrally connected in sequence, and the outer conductor comprises a shell and an outer bayonet used for clamping a cable shielding layer in a clearance fit mode which are integrally connected. The tail end of one end, far away from the horn opening, of the horn-shaped coaxial structure is connected with the SMA connector, a needle core of the SMA connector and the connecting column are on the same horizontal line, and a 135-degree transition angle is formed at the joint of the connecting ...

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Номер записи: 21
30-12-2015 дата публикации

Automobile tail light fault detection device

Номер: CN0204915441U
Автор: LIAO YANQUN
Принадлежит:

The utility model discloses an automobile tail light fault detection device, inside being equipped with a base and the receiving arrangement that circuit board, both sides were equipped with the connection of electric lines head including one, still being equipped with wireless sensor on the base, still include a wireless luminance sensor simultaneously, it is through the circuit board of connection of electric lines in the base, receiving arrangement includes the plastics pedestal, is equipped with first, second alarm lamp, first, the wireless receiving arrangement of second sensor on the pedestal, and the wireless receiving arrangement of first alarm lamp and first sensor forms electric connection, and latter wireless connection wireless sensor, second alarm lamp and second sensor wireless receiving device form electric connection, and latter wireless connection in wireless luminance sensor, the utility model discloses a wireless sensing technique, whether the mode through the sensing ...

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Номер записи: 22
26-03-2014 дата публикации

Anti-interference method for high-frequency partial discharge signal detection

Номер: CN103675617A
Автор: XU YANG, ZHANG XIANG, HU XIAO, CUI JIANGJING, SUN TINGXI, LIAO YANQUN
Принадлежит:

The invention discloses an anti-interference method for high-frequency partial discharge signal detection. The anti-interference method includes the steps of 1, building partial discharge signal simulation testing circuit system to acquire signals which are generated from local discharge pulse signals carrying noises after passing through the partial discharge signal simulation testing circuit system, and analyzing characteristics of the signals within a wavelet domain to acquire optimal parameter that is denoised by a discrete wavelet transform based threshold process; 2, acquiring the field partial discharge signals carrying noises, and acquiring the coefficient of the partial discharge signals within the wavelet domain by denoising the partial discharge signals carrying noises by the discrete wavelet transform based threshold process according to the optimal parameter; 3, performing wavelet reconstruction according to the coefficient of the partial discharge pulse signals within the ...

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Номер записи: 23
18-08-2023 дата публикации

Power flow calculation method and system for droop control direct-current power distribution network

Номер: CN116613760A
Автор: YANG RUIXIONG, ZHAO XIAOYAN, CHEN JIANFU, CHEN YONG, LIAO YANQUN, PEI XINGYU, LI JIANBIAO, CHENG XU, WU HONGYUAN, ZHENG LINSHENG, CHEN JIANDIAN, GU YANXUN, CAO JIAN, YU SONGTAO, LI WEIWEI, QIAO XUEBO
Принадлежит:

The invention relates to the technical field of optimized operation of a direct-current power distribution network, in particular to a droop control direct-current power distribution network load flow calculation method and system. Comprising the following steps: constructing an equivalent power flow model of a droop control node in the droop control DC power distribution network, and calculating the equivalent power of the droop control node according to the equivalent power flow model; establishing a second-order cone model according to the equivalent power of the droop control node by taking a node power injection constraint and a cone relaxation constraint as constraint conditions; outputting a load flow calculation result according to the second-order cone model; according to the method, multiple iterative calculations on the direct current side voltage of the converter can be avoided by introducing the equivalent model, and the load flow calculation result is output by establishing ...

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Номер записи: 24
28-07-2023 дата публикации

Injection current probe for cable fault detection

Номер: CN116500320A
Автор: CAI WEI, CUI JIANGJING, LI TIANSHU, ZHU ZILONG, HUANG BINGQUAN, LI HAISHEN, LIAO YANQUN, XIONG TINGTING, ZHU WUZHOU, ZENG FANYUAN, QIU WEI, ZHANG JING
Принадлежит:

The invention provides an injection current probe for cable fault detection, which comprises a closed shell internally provided with a cavity and a connector, the connector is fixed on the shell and is used for connecting a current signal generator, and the shell is provided with a through hole penetrating through the upper side and the lower side of the shell; an even number of not less than four U-shaped magnetic cores are uniformly fixed in the cavity along the circumference by taking the through hole as the center, and U-shaped openings of the magnetic cores all face the through hole; the two ends of each magnetic core are respectively wound with a coil, one end of each coil is connected with the connector, and the other end of each coil is connected with the shell, so that the coils at the two ends of each magnetic core form the same closed magnetic circuit after being connected with current; and the hole wall of the through hole is provided with an annular coupling slot which is over ...

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Номер записи: 25
27-06-2023 дата публикации

Wind and wave integrated power generation device

Номер: CN116335867A
Автор: ZOU GUOHUI, WU HONGYUAN, CHEN JIANFU, LI ZHENCONG, WANG HONGXING, CHEN YONG, BAE SUNG-WOO, YANG RUIXIONG, CHENG XU, LI JIANBIAO, LIAO YANQUN, LIAO PENG, XIAO XIAOQING
Принадлежит:

The invention relates to the technical field of ocean wave energy utilization, in particular to a wind and wave integrated power generation device which comprises a wave power generation structure and an energy conversion system, the wave power generation structure comprises a conductor, a wave absorbing floater and a magnet, the conductor is arranged on the outer wall of a fan tower and electrically connected with the energy conversion system, and the wave absorbing floater is electrically connected with the energy conversion system. A mounting hole is formed in the wave-absorbing floater, the wave-absorbing floater is arranged on the fan tower barrel in a sleeving manner through the mounting hole, the magnet is arranged on the inner wall of the mounting hole, and when the wave-absorbing floater vertically swings along the fan tower barrel along with sea waves, the conductor cuts magnetic lines of force of the magnet in the mounting hole; the defects that in the prior art, a power generation ...

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Номер записи: 26
05-05-2023 дата публикации

Offshore wind power frequency division sending-out port equivalent method and device

Номер: CN116070553A
Автор: CAI ZHONGQI, YANG KUN, CHEN JIANFU, GAN DESHU, PENG SUI, GU YANXUN, BAE SUNG-WOO, OU ZHONGXI, LIAO YANQUN, XING XUBIN, LIU CHAO
Принадлежит:

The invention discloses an offshore wind power frequency division output port equivalent method and device, and the method comprises the steps: respectively building a fan group reliability model, a current collection system reliability model, a long-distance submarine cable reliability model, a booster station reliability model, a frequency conversion station reliability model and a fan output distribution model; then establishing a system operation state model including a serious fault state and a normal operation state, then performing average capacity calculation and output distribution calculation in the normal operation state, and finally establishing an output scene of the system in the normal operation state combined with energy storage based on a probability frequency theory. And obtaining the output scene probability and the output value of each system in a normal operation state. The technical problem that an existing offshore wind power frequency division sending-out technology ...

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Номер записи: 27
29-08-2023 дата публикации

Current probe for non-contact cable fault detection

Номер: CN116660609A
Автор: CAI WEI, CUI JIANGJING, ZHU ZILONG, HUANG BINGQUAN, JIANG ZHIBIN, ZHANG JING, QIU WEI, LIAO YANQUN, XIONG TINGTING, ZENG FANYUAN
Принадлежит:

The invention discloses a current probe for non-contact cable fault detection, which is characterized in that two flange plate connectors are arranged on an annular shielding shell, a first flange plate connector is used as a current injection probe, a second flange plate connector is used as a current detection probe, and a core wire of the first flange plate connector is connected with one end of a copper strip; the other end of the copper strip is fixed in the first semi-circular shielding shell after winding the first semi-circular magnetic ring and the second semi-circular magnetic ring for one circle, the core wire of the second flange connector is connected with one end of a wrapping wire, and the other end of the wrapping wire is fixed in the second semi-circular shielding shell after winding the third semi-circular magnetic ring and the fourth semi-circular magnetic ring for eight circles. The technical problems that the original connection of the cable needs to be disconnected ...

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Номер записи: 28
12-05-2023 дата публикации

Control method and device applied to LLC resonant circuit

Номер: CN116111814A
Автор: CHENG XU, CHEN JIANFU, CHEN YONG, WU YUE, ZOU GUOHUI, BAE SUNG-WOO, YANG RUIXIONG, LI JIANBIAO, WU HONGYUAN, LIU YAO, LIAO YANQUN, ZHAO XIAOYAN, ZHOU YUEBIN, LI WEIWEI, FENG JUNJIE, WEI WEI
Принадлежит:

The invention discloses a control method and device applied to an LLC resonant circuit, and the method comprises the steps: obtaining a current operation state of the LLC resonant circuit in response to a circuit gain adjustment request, determining a corresponding action instruction based on the circuit gain adjustment request and the current operation state, and carrying out the control of the LLC resonant circuit. The on-off states of the first switch group, the second switch group and the third switch group are switched according to the action instruction, so that the LLX resonant circuit can be switched to different circuit modes according to different gain requirements, and the problems that when the output voltage change range of the power supply module is large, the switching frequency change of the three-phase LLC resonant circuit is large, the resonant current waveform is poor, and the power supply module is damaged are solved. And the operation stability of the circuit is improved ...

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Номер записи: 29
11-07-2023 дата публикации

Method and device for identifying local defects of high-voltage power cable

Номер: CN116415186A
Автор: CAI WEI, CUI JIANGJING, JIANG ZHIBIN, LI TIANSHU, ZHANG JING, LIAO YANQUN, LI HAISHEN, ZHU WUZHOU, WU HONGXIAO, QIU WEI
Принадлежит:

The invention discloses a high-voltage power cable local defect identification method and device, and the method comprises the steps: firstly fitting a cable characteristic impedance evolution rule curve of each cable local defect type, and then extracting a maximum value, a minimum value, an average value, concavity and convexity and increase and decrease of each cable characteristic impedance evolution rule curve as cable local defect characteristic parameters; respectively constructing a training set and a test set, taking water tree branches, thermal aging, extrusion type local defects and cutting type local defects as classification labels, and training and testing the cable local defect identification model by utilizing the training set and the test set to obtain a target cable local defect identification model; the specific types of the local defects of the high-voltage power cable are identified by using the target cable local defect identification model, so that the local defects ...

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Номер записи: 30
14-07-2023 дата публикации

In-situ monitoring method for phase transition in heat treatment process of zinc oxide varistor

Номер: CN116429820A
Автор: ZHU WUZHOU, LIAO YANQUN, LIU DANBING, LI DI, LI ZHIYU, ZHUO ZHIHAO, WANG QIANG, LI HUIHONG, HUANG JIAMING, HU XINXIN, WU SIHENG, CHEN ZHAOWEI, LI WENBO, YE YUTING, WANG YADI, LI YILIN, CHEN LIN, YI YINXIANG
Принадлежит:

The invention belongs to the technical field of zinc oxide ceramic resistors, and particularly relates to an in-situ monitoring method for phase transition in the heat treatment process of a zinc oxide piezoresistor. According to the in-situ monitoring method provided by the invention, the technical problem that in the prior art, an in-situ monitoring method for Bi2O3 phase state transition in the heat treatment process of the zinc oxide varistor is lacked is solved by obtaining the direct-current conductive activation energy in the heating stage or the dielectric constant in the cooling stage in the heat treatment process of the zinc oxide varistor blank.

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Номер записи: 31
09-05-2023 дата публикации

Method and device for constructing power division frequency impedance model of frequency division frequency converter, terminal and medium

Номер: CN116093942A
Автор: YANG KUN, CAI ZHONGQI, LI ZHENCONG, PENG SUI, GAN DESHU, GU YANXUN, BAE SUNG-WOO, OU ZHONGXI, LIAO YANQUN, XING XUBIN, LIU CHAO
Принадлежит:

The invention discloses a method and a device for constructing a power division frequency impedance model of a frequency division frequency converter, a terminal and a medium. According to the technical scheme provided by the invention, the disturbance quantity of direct-current voltage is considered in a modulation process, and a transfer function of disturbance parameters to the output voltage disturbance quantity of the frequency division frequency converter is combined; constructing a voltage modulation small signal model containing a mathematical relationship between voltage and current small signal disturbance quantity of a common coupling point on the power/frequency division two sides of the frequency division frequency converter and output voltage disturbance quantity of the frequency division frequency converter in a controlled alternating current voltage mode; therefore, the model established based on the scheme of the invention has higher accuracy in a system stability analysis ...

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Номер записи: 32
25-07-2023 дата публикации

Multi-objective optimization method and system for operation reference power of direct-current power distribution network

Номер: CN116488230A
Автор: CHEN JIANFU, YANG RUIXIONG, ZHAO XIAOYAN, CHEN YONG, LIAO YANQUN, BAE SUNG-WOO, LI JIANBIAO, CHENG XU, WU HONGYUAN, CHEN JIANDIAN, ZHENG LINSHENG, GU YANXUN, CAO JIAN, YU SONGTAO, LI WEIWEI, QIAO XUEBO
Принадлежит:

The invention relates to the technical field of optimized operation of a direct-current power distribution network, in particular to a multi-objective optimization method and system for operation reference power of the direct-current power distribution network. Establishing an operation reference power optimization model by taking node voltage constraint, converter capacity constraint and line capacity constraint as constraint conditions according to the sensitivity of the power variation of the node injected into the power grid to the line transmission power variation and the sensitivity of the power variation of the node injected into the power grid to the converter power variation; obtaining an optimization result of the operation reference power according to the operation reference power optimization model; according to the invention, interference terms can be eliminated through a two-layer identification mode, so that the identification result is more accurate, and the problem of inaccurate ...

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Номер записи: 33
08-08-2023 дата публикации

Inertia support control method and control device for bidirectional charging and discharging module

Номер: CN116565897A
Автор: CHENG XU, WU YUE, CHEN YONG, ZHOU YUEBIN, CHEN JIANFU, LI WEIWEI, ZOU GUOHUI, YANG SHUANGFEI, BAE SUNG-WOO, FENG JUNJIE, YANG RUIXIONG, LI JIANBIAO, WU HONGYUAN, ZHAO XIAOYAN, LIU YAO, LIAO YANQUN
Принадлежит:

The invention discloses an inertia support control method and device for a bidirectional charging and discharging module, and the method comprises the steps: multiplying a difference value between a frequency value obtained through the calculation of a phase-locked loop at a grid-connected point and a set frequency reference value through a first gain coefficient in a DC voltage control loop of an AC/DC converter, and then transmitting the difference value to a front end of a first PI controller; after the difference value between the AC power measurement value of the grid-connected point and the power measurement value of the DC output port is superposed on the estimated loss of the DC/DC converter by the power control outer ring of the DC/DC converter, the product is multiplied by a second gain coefficient and then is sent to the front end of a second PI controller, so that the bidirectional charging and discharging module has an inertia supporting function; according to the method, a ...

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Номер записи: 34
04-07-2023 дата публикации

Bidirectional charging module control method and system based on inertia support

Номер: CN116388253A
Автор: WU YUE, CHENG XU, ZHOU YUEBIN, CHEN YONG, LI WEIWEI, CHEN JIANFU, ZOU GUOHUI, BAE SUNG-WOO, YANG RUIXIONG, LI JIANBIAO, WU HONGYUAN, ZHAO XIAOYAN, LIU YAO, LIAO YANQUN
Принадлежит:

The invention discloses a bidirectional charging module control method and system based on inertia support, and the method comprises the steps: inputting a difference result between a frequency value obtained through the calculation of a phase-locked loop at a grid-connected point and a set frequency reference value into a high-pass filter, and transmitting an obtained filtering result to a first PI controller; and the first current inner loop control and modulation module modulates and outputs a first modulation signal to the AC/DC converter. Meanwhile, a filtering result is subtracted from a difference result between a frequency value obtained through phase-locked loop calculation at a grid-connected point and a set frequency reference value to obtain a power control value, the power control value is sent to a second PI controller, and a second modulation signal is output to the DC/DC converter through modulation of a second current inner loop control and modulation module. The technical ...

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Номер записи: 35
11-04-2023 дата публикации

Three-core submarine cable partial discharge detection system and method

Номер: CN115951184A
Автор: LIAO YANQUN, NAN BAOFENG, CAO ANYING, TANG JIE, XIAO JIXIONG, HE WEI, WANG HANG, CUI JIANGJING, WU HONGXIAO, LI DI, YANG SHUAI, LIN MINHONG, ZHU WUZHOU, SUN TINGXI, SONG WEIJIE, HU XINXIN, HUANG JIAMING
Принадлежит:

The invention relates to the technical field of partial discharge detection, and discloses a three-core submarine cable partial discharge detection system and method.The system emits pulsed light through a light source, after the pulsed light is enhanced through an optical amplifier, the pulsed light is divided into two paths through a first coupler, and the two paths of pulsed light are polarized and delayed respectively; the two light paths are output into the circulator through the second coupler and are input into an optical fiber of a three-core submarine cable to be detected, backscattered light in the optical fiber of the three-core submarine cable is output through the circulator and is divided into two paths through the third coupler, the backscattered light is subjected to polarization detection and time delay respectively, and the optical fiber of the three-core submarine cable to be detected is obtained. The two paths of backscattered light are coupled to a photoelectric detector ...

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Номер записи: 36