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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 36. Отображено 36.
05-06-2020 дата публикации

Granular medicament vibrating screen machine

Номер: CN0210675886U

The utility model discloses a granular medicament vibration screening machine which comprises a vibration screening machine body, a screen combination, a vibration face and a controller, the upper endface of the vibration screening machine body is the vibration face, the screen combination is arranged on the vibration face, and granular medicaments are placed in the screen combination. At least three fixing rods are arranged on the oscillation surface; the fixing rods are uniformly arranged around the oscillation surface; a screen combination can be contained among the three fixing rods, external threads are arranged on the surfaces of the fixing rods, fixing clamps are arranged on the external threads of the fixing rods, the fixing clamps are freely screwed up and down on the fixing rods, limiting rings are arranged at the upper ends of the fixing rods, the fixing rods penetrate through ring bodies of the limiting rings, and fixing nuts are arranged at the upper ends of the limitingrings ...

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07-04-2023 дата публикации

Application of rifobetine in preparation of medicine for treating pulmonary fibrosis

Номер: CN115919849A
Принадлежит:

The invention discloses application of a substance for inhibiting STAT6 signal channel activation in preparation of a medicine for treating pulmonary fibrosis, and also discloses application of rifobutine in treatment of pulmonary fibrosis, belongs to the technical field of pulmonary fibrosis treatment, and lays a foundation for development of clinical medicines for pulmonary fibrosis.

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01-08-2023 дата публикации

Low-carbon park carbon management and control method and system based on carbon accounting intelligent tracking

Номер: CN116523115A
Принадлежит:

The invention discloses a low-carbon park carbon management and control method and system based on carbon accounting intelligent tracking, and the method comprises the steps: determining a low-carbon park check range based on the carbon emission in a low-carbon park and the carbon emission offset by vegetation; collecting carbon source and carbon sink data in the checking range, and establishing a dynamic prediction model for the carbon emission of the low-carbon park; collecting carbon footprints in the low-carbon park, and combining with the prediction model to carry out full-period and full-field carbon accounting on the low-carbon park; and performing intelligent carbon management and control on the low-carbon park by combining the Internet of Things according to a model prediction result. The problems that a traditional load prediction method is high in simulation modeling difficulty, difficult in basic data acquisition, poor in calculation accuracy and unable to be copied and popularized ...

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28-07-2023 дата публикации

Photovoltaic area power failure risk assessment method and device, electronic equipment and storage medium

Номер: CN116502894A
Принадлежит:

The invention discloses a photovoltaic area power failure risk assessment method and device, electronic equipment and a storage medium, which are used for solving the technical problem that the existing photovoltaic area power failure risk assessment is low in efficiency and accuracy. The method comprises the following steps: acquiring a risk assessment index of a photovoltaic transformer area to be assessed, and calculating a plurality of power failure risk assessment sub-indexes corresponding to the photovoltaic transformer area based on the risk assessment index; performing analytic hierarchy process on the plurality of power failure risk assessment sub-indexes to obtain respective corresponding power failure assessment ratio coefficients, and respectively calculating power failure index weights corresponding to the power failure assessment ratio coefficients; performing weighted comprehensive evaluation processing on each power failure index weight, and determining a comprehensive power ...

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18-08-2023 дата публикации

Lightning current waveform rapid identification method and system

Номер: CN116609576A
Принадлежит:

The invention discloses a lightning current waveform rapid identification method and system, and the method comprises the steps: verifying the unipolarity of a waveform signal; monotonicity of the waveform signal is verified; verifying concavity and convexity of the waveform signal; verifying energy distribution of the waveform signal on different frequency bands; and if the unipolarity, monotonicity, concavity and convexity and energy distribution verification pass, a pulse signal is triggered to store a lightning waveform signal. The FPGA is used as a processor, the waveform output by the sensor is sent to the FPGA through a sampling chip after signal conditioning, an identification result is given through comprehensive analysis of waveform polarity, monotonicity, concavity and convexity and other wave head time domain characteristics and energy distribution characteristics on different frequency bands, and compared with an existing identification algorithm, the response speed and reliability ...

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30-03-2018 дата публикации

Electronic strength test machine that breaks

Номер: CN0207163684U

The utility model discloses an electronic strength test machine that breaks mainly includes measuring mechanism, instrument mechanism and conveyor device, anchor clamps under the measuring mechanism includes anchor clamps adjust knob, test regulation pole, upward anchor clamps reach, instrument mechanism is including resistant broken intensity meter table, anchor clamps manometer, conveyor devicesets up flexible rotation type transportation platform including the transportation platform, has reduced labor quantity, has saved the cost of labor, ensures through the pressure of alignment jig that the product does not suffer destruction down at current transportation environment, perhaps reaches when breaking the within range in the packing of product, in time changes the packing of product,the utility model relates to a rationally, extensively be applicable to transport industry.

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09-05-2023 дата публикации

Data center-containing power distribution network comprehensive planning method considering source load uncertainty

Номер: CN116090762A
Принадлежит:

The invention discloses a data center-containing power distribution network comprehensive planning method considering source load uncertainty, and the method comprises the steps: inputting a DC power distribution network topological structure and parameter information according to a selected data center-containing power distribution network; according to the provided parameter information of the number-containing center power distribution network, establishing a deterministic number-containing data center power distribution network comprehensive planning model; obtaining a compact form through a deterministic data center-containing power distribution network comprehensive planning model; establishing a data center-containing power distribution network distribution robust comprehensive planning model considering uncertainty through a compact form of a deterministic data center-containing power distribution network comprehensive planning model; solving an output result of the robust comprehensive ...

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17-12-2014 дата публикации

Method for soft measurement of openness signal of high pressure cylinder steam intake adjusting valve of steam turbine

Номер: CN104214415A
Принадлежит:

The invention relates to a method for soft measurement of an openness signal of a high pressure cylinder steam intake adjusting valve of a steam turbine. The method is used for measuring the first-level pressure P1 of the steam turbine and the front steam pressure Pt of the steam turbine in real time and calculating the openness OV of the high pressure cylinder steam intake adjusting valve of the steam turbine by using a formula as shown in the specification, wherein Kv is a flow-pressure difference coefficient of the steam turbine and is obtained by calibration. Except by the high pressure cylinder steam intake adjusting valve, the pressure loss caused by throttling components or resistance components including a main steam valve, a steam pipeline, a steam turbine adjusting stage and the like is compensated, so that the openness of the steam intake adjusting valve is closer to real openness, the control precision for the openness of the steam intake adjusting valve is greatly improved, ...

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04-03-2015 дата публикации

Power oscillation judging device

Номер: CN104393606A
Принадлежит:

The invention discloses a power oscillation judging device. The power oscillation judging device comprises an ascending direction change rate detection alarm loop, a descending direction change rate detection alarm loop, a change amplitude detection alarm loop, a rising amplitude and rate overrun counter, a descending amplitude and rate overrun counter, an oscillation judgment loop and an output loop, wherein the ascending direction change rate detection alarm loop is connected with the rising amplitude and rate overrun counter, the descending direction change rate detection alarm loop is connected with the descending amplitude and rate overrun counter, the change amplitude detection alarm loop is connected with the rising amplitude and rate overrun counter and the descending amplitude and rate overrun counter, the rising amplitude and rate overrun counter is connected with the oscillation judgment loop, the descending amplitude and rate overrun counter is connected with the oscillation ...

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26-08-2015 дата публикации

Electricity generation power instruction feed-forward control method of thermal power generating unit coordination control system

Номер: CN104865925A
Принадлежит:

The invention relates to an electricity generation power instruction feed-forward control method of a thermal power generating unit coordination control system. The electricity generation power instruction feed-forward control logic includes the step that automatic generation control (AGC) instructions are divided into two paths after passing through a change amplitude limiting link, wherein one path of AGC instructions is subjected to a change rate limiting link so that actual electricity generation power instructions can be generated, and the other path of AGC instructions is subjected to a linear filtering link, a change rate limiting link and a leading link, so that electricity generation power instruction feed-forward output can be obtained. According to the electricity generation power instruction feed-forward control system of the thermal power generating unit coordination control system of the invention, the boiler of a thermal power generating unit is reasonably utilized to store ...

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17-12-2014 дата публикации

Compensation method for realizing dynamic precise matching ratio between direct-current boiler water supply flow rate and fuel amount

Номер: CN104214792A
Принадлежит:

The invention relates to a compensation method for realizing a dynamic precise matching ratio between the direct-current boiler water supply flow rate and fuel amount. The method is characterized in that a water supply flow rate lagged compensation link is added between a boiler main controller output signal representing a boiler fuel amount instruction and a theoretical water supply flow rate instruction to delay the variation time of the water flow rate, the water supply flow rate delay compensation link comprises a multipoint fold-line functional module F1(x) and four-step inertia link, an input signal of the multipoint fold-line functional module F1(x) is an output signal of the boiler main controller, and the output end f the boiler main controller is used for giving a theoretical water supply flow rate instruction signal through the four-step inertia link. A stable water-fuel ratio in the high-rate variable-load operation period of the direct-current boiler can be maintained in the ...

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08-08-2023 дата публикации

Dynamic operation monitoring device for electric power energy system

Номер: CN116557729A
Принадлежит:

The invention discloses a power energy system dynamic operation monitoring device, which comprises a moving mechanism, a monitoring mechanism, a power energy system dynamic operation monitoring mechanism and a power energy system dynamic operation monitoring mechanism, and is characterized in that the moving mechanism comprises a moving track, a monitoring vehicle chassis arranged on the moving track, and a rotating assembly and a steering assembly which are arranged on the monitoring vehicle chassis and drive the monitoring vehicle chassis to move through mutual cooperation of the rotating assembly and the steering assembly; comprising a linkage assembly arranged on the rotating assembly and a monitoring assembly connected with the linkage assembly, the linkage assembly and the rotating assembly rotate together, the monitoring assembly can be driven to rotate, and the monitoring range is widened. The driving assembly and the plug-in assembly are arranged on the plug-in plate, and the plug-in ...

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25-04-2023 дата публикации

Power distribution network multi-body peak regulation energy optimization method and device

Номер: CN116012030A
Принадлежит:

The invention discloses a power distribution network multi-body peak regulation energy optimization method, which comprises the steps of establishing a peak regulation energy optimization framework between a power distribution network operator and a load aggregator, a distributed energy storage operator and a photovoltaic operator based on a reinforcement learning theory; constructing a power distribution network operator model, wherein the optimization target comprises the maximum operation income and the minimum net load curve standard deviation; a cooperative alliance model is constructed based on an internal interaction electricity price and a peak regulation price issued by a power distribution network operator, and the cooperative alliance model comprises a load aggregator optimization model, a distributed energy storage operator model, a photovoltaic operator model and a cooperative game model; comprehensively considering the benefits of the cooperation alliance, and constructing ...

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30-03-2018 дата публикации

Boiling granulation machine dust cleaning system

Номер: CN0207153361U

The utility model discloses a boiling granulation machine dust cleaning system mainly includes dry mechanism, dust removal mechanism and granulation mechanism, dry mechanism mainly includes drying equipment, fluidized bed dryer, the dry machine of boiling, dust removal mechanism mainly includes sack cleaner and cyclone, granulation mechanism is mainly including mixing jar and discharge gate, boiling granulation owner is stereoscopic for mixing the jar, it sets up the charging means to mix the jar top, it sets up dry mechanism to mix the jar below, dry mechanism sets up the machine into fluidizing drying, the utility model relates to a boiling granulation machine dust cleaning system sets up dust cleaning system at the boiling granulation built -in, operates in closing close container, andno dust flies upward, improves operation environment, accords with the standard, guarantees that the workman keeps away from dusty environment in the course of the work, the utility model relates to arationally ...

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01-05-2018 дата публикации

Machine is mixed to mill's coulter formula

Номер: CN0207287180U

The utility model discloses a machine is mixed to mill's coulter formula mainly includes transmission, main shaft, coulter subassembly and manhole cover plate, transmission and spindle drive are connected, the coulter subassembly of establishing ties on the main shaft and constituteing by a plurality of coulters, manhole cover plate sets up in the top of mixing quick -witted box, it sets up to bilayer structure to mix quick -witted box, the utility model relates to a machine is mixed to mill's coulter formula, that forms the coulter subassembly whenever all sets up reverse ware to the coulterlink, avoids mixing dead angle, guarantees to mix more even, sets up and prevents the wearing layer, has lengthened the live time of mixed machine, has practiced thrift the cost, the utility model discloses extensively be applicable to processing industry.

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14-04-2023 дата публикации

Application of FTO in screening of drugs for treating renal interstitial fibrosis

Номер: CN115961026A
Принадлежит:

The invention discloses application of FTO in screening of drugs for treating renal interstitial fibrosis, and belongs to the technical field of biological medicine. According to the application of the FTO in screening the medicine for treating the renal interstitial fibrosis, a series of in-vivo and in-vitro experiments find that the medicine for treating the renal interstitial fibrosis activates a cell autophagy signal channel, inhibits fibrosis formation and relieves the renal interstitial fibrosis; through methods such as western blot, immunofluorescence, immunohistochemistry and doltblot, it is found that change of the FTO expression level plays an important role in regulating and controlling the autophagy signal channel, and the renal interstitial renal fibrosis treatment medicine can inhibit FTO expression; by up-regulating the FTO expression level of the cells, the effect of the renal interstitial fibrosis treatment medicine for activating the autophagy signal channel to relieve ...

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04-04-2023 дата публикации

Distribution transformer district weight and overload early warning method and device based on data mining

Номер: CN115907083A
Принадлежит:

The invention discloses a distribution transformer district heavy overload early warning method and device based on data mining, and the method comprises the steps: collecting the internal and external historical data of the heavy overload of a power grid distribution transformer district, and carrying out the preprocessing of the historical data through setting a PID controller; heavy overload characteristic variables are extracted from the preprocessed data, and strong correlation characteristic variables between a single variable or a variable combination and a heavy overload event are screened through multi-variable multi-layer correlation; classifying the strong correlation feature variables to obtain a heavy overload correlation feature set, and performing time sequence analysis on heavy overload data; a weight and overload prediction model is constructed through an XGBoost algorithm, and training verification is carried out. According to the method, the prediction method can be formed ...

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04-07-2023 дата публикации

Lightning invasion point positioning method and system based on isolation lightning protection device

Номер: CN116381408A
Принадлежит:

The invention discloses a lightning invasion point positioning method and system based on an isolation lightning protection device, and the method comprises the steps: arranging the isolation lightning protection device on an overhead line according to a preset distance, and enabling the isolation lightning protection device to comprise a monitoring unit, a current mutual inductance unit, and a time synchronization unit; obtaining the earth current of each phase of each isolation lightning protection device, and carrying out the synchronous sampling of the earth current of each phase; according to a synchronous sampling result, abnormal parameters of the isolation lightning protection device are determined, and whether lightning invasion is abnormal is judged; and the lightning invasion position is positioned according to the abnormity occurrence time and the lightning wave propagation time. According to the method, the function of the isolation lightning protection device is expanded, ...

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11-07-2023 дата публикации

Photovoltaic balanced output method based on time sequence prediction and distributed secondary control

Номер: CN116417984A
Принадлежит:

The invention discloses a photovoltaic balanced output method based on time sequence prediction and distributed secondary control. The method comprises the following steps: collecting current data, predicting maximum output, and carrying out data processing to obtain a smooth photovoltaic panel maximum output predicted value; updating the droop coefficient and the virtual voltage drop according to the maximum output predicted value; exchanging control signals with neighbors, and calculating to obtain secondary control signals through interaction information and virtual voltage drop; and applying the secondary control signal to the secondary control to obtain a reference signal sent to the primary control, and applying droop control to complete balanced output of the photovoltaic panel. The problem of unbalanced output of the photovoltaic panels is solved, a hierarchical control thought is adopted, so that the ratio of the output power of each photovoltaic panel to the maximum output power ...

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12-05-2023 дата публикации

Voltage out-of-limit risk assessment method based on analytic probabilistic power flow

Номер: CN116109134A
Принадлежит:

The invention discloses a voltage out-of-limit risk assessment method based on analytic probabilistic power flow. The method comprises the following steps: acquiring historical data of an injection power prediction value and a prediction error; modeling the conditional probability distribution of the prediction error of the node injection power, and quantifying the uncertainty of the injection power of each node of the power distribution network; obtaining a probability density function of the node voltage amplitude; judging whether the node belongs to a voltage out-of-limit high-risk node or not; outputting the probability density curve of the voltage amplitude of each node at each moment, and evaluating the voltage out-of-limit risk; a probabilistic load flow calculation method of an active power distribution network is researched, an active power distribution network voltage second-order approximation probability evaluation method based on an analytic probabilistic load flow method is ...

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04-04-2023 дата публикации

Energy storage prefabricated cabin with data acquisition function and system thereof

Номер: CN115912664A
Принадлежит:

The energy storage prefabricated cabin with the data acquisition function comprises a prefabricated cabin cold room, a prefabricated cabin hot room is arranged at the top of the prefabricated cabin cold room, a solar photovoltaic panel and an infrared temperature and humidity detector are installed at the top of the prefabricated cabin cold room, and a power supply and control module is arranged on one side of the prefabricated cabin cold room. And a storage unit is fixed in the prefabricated cabin cold room. According to the energy storage prefabricated cabin with the data acquisition function and the system thereof, through device structural design, the energy storage unit and the real-time working environment of the environment where the energy storage unit is located can be acquired, and available data is provided for evaluating the working state of the energy storage unit and even applying the data to multi-source data isomerism and future new energy load output prediction. A low-energy-consumption ...

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05-06-2020 дата публикации

Portable plastic product production mold

Номер: CN0210679376U

The utility model belongs to the field of dies. The utility model relates to a mold, in particular to a portable plastic product production mold. The utility model discloses a plastic product production die and relates to a plastic product production die. The plastic molding efficiency is relatively low; the requirements of people cannot be met. Proposed now is the following scheme, the device comprises a bottom plate, side plates are welded to the two sides of the top of the bottom plate. The top of the bottom plate is fixedly connected with a lower die through bolts. A die groove is formed in the top of the lower die, side plates are slidably mounted on the sides, close to each other, of the two side plates, the same upper die is welded to the sides, close to each other, of the two sideplates, two mounting grooves are formed in the bottom of the upper die, heating plates are fixedly connected into the mounting grooves through bolts, and a bearing plate is welded to one side plate. The ...

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02-09-2015 дата публикации

Prevent primary control retroegulation ware

Номер: CN0204615390U
Принадлежит:

The utility model discloses a prevent primary control retroegulation ware, it includes output circuit, the primary control direction is judged return circuit, primary control action and is judged return circuit and AGC action and judge return circuit and unit target power and select to judge loop connection that unit target power is selected to judge the return circuit and is connected with output circuit, the utility model provides a prior art adopt the primary control technique to keep generating set primary control control system that electric wire netting frequency stabilization exists because design imperfect can not adapt to all operating modes that appear in the production process, cause that the actual power change effect of power demand that electric wire netting frequency change corresponds and generating set primary control action is opposite, finally aggravated the primary control 0 scheduling problem of electric wire netting frequency, the power change effect of having solved ...

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11-04-2023 дата публикации

Distributed energy situation awareness terminal optimization stationing method and device

Номер: CN115954935A
Принадлежит:

The invention discloses a distributed energy situation awareness terminal optimization stationing method. The method comprises the following steps: determining upper and lower bounds of a prediction error based on predicted power and actual power of a load in combination with normal distribution characteristics; establishing a power grid power flow model based on the prediction error; decoupling an active power and reactive power relation through a power grid power flow model, and respectively solving the similarity of voltage and reactive power based on curve classification of voltage and active power; and respectively establishing similarity matrixes according to the voltage similarity and the reactive similarity, wherein the intersection of the similarity matrixes is the number of the situation awareness terminals needing to be deployed. Starting from the time-space correlation, the global situation awareness terminal of the power grid is realized by using the voltage and power correlation ...

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05-06-2020 дата публикации

Vertical grinding machine for screening suspending agent formula

Номер: CN0210675385U

The utility model discloses a vertical grinding machine for screening a suspending agent formula. The device comprises a controller, a bottom plate, a vertical rod, a rotating motor, a rotating shaft,dispersing discs and a dull polish cylinder, the vertical rod is installed on the bottom plate, the rotating motor is arranged on the vertical rod, a transmission shaft of the rotating motor is arranged downwards, the transmission shaft of the rotating motor is connected with the rotating shaft, and the dispersing discs are evenly arranged on the rotating shaft. A longitudinal sliding rail is arranged on the vertical rod, and the rotating motor is arranged on the longitudinal sliding rail of the vertical rod and freely moves up and down on the longitudinal sliding rail. A water cooling layeris arranged on the outer side of the dull polish cylinder, wraps the outer wall of the whole dull polish cylinder and is provided with a water inlet and a water outlet. According to the utility model,the ...

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30-06-2023 дата публикации

Automatic equipment for preparing cutting pick and preparation method

Номер: CN116352387A
Принадлежит:

The invention relates to the technical field of excavation equipment manufacturing, in particular to automatic equipment for preparing cutting picks and a preparation method. The automatic equipment for preparing the cutting picks comprises a conveying device, a conveying device and a cutting device, the conveying device is provided with a conveying path for conveying the cutting picks, and the cutting picks can rotate and move along the conveying path; the coating device is provided with a coating part used for supplying and conveying a braze coating material to the cutting pick, and the coating part abuts against the cutting pick and completes whole-circle coating in the circumferential direction of the cutting pick in the autorotation process of the cutting pick; the drying device is used for drying the braze coating material; the heating device is used for heating the library body and the hard alloy pick head so that the library body and the hard alloy pick head are connected into a ...

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01-08-2023 дата публикации

Distribution line lightning distributed monitoring networking method

Номер: CN116527533A
Принадлежит:

The invention discloses a distribution line thunder and lightning distributed monitoring networking method, which comprises the steps that acquisition nodes are selected along a distribution line, the nodes comprise an A-phase circuit, a B-phase circuit and a C-phase circuit, each node is provided with a terminal device, the three-phase circuits communicate with a communication module, and the communication module comprises a zigbee communication module and a LoRa communication module; a LoRa communication module is deployed in the middle of a power distribution line and communicates with 4G DTU equipment through RS232; each communication module is configured with a unique equipment ID, an MAC address and a network ID, secondary related parameters are obtained after the equipment accesses the network, the equipment accesses the network and makes a judgment, and if no problem is confirmed, an ID address is allocated to each node; during data transmission, each node needs to comply with related ...

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02-09-2015 дата публикации

Ignition structure of " W " flame boiler

Номер: CN0204611752U
Принадлежит:

The utility model provides an ignition structure of " W " flame boiler, including buggy pipeline and cubic tuber pipe, include still that branch road buggy pipeline and little oily buggy ignition, the one end and the buggy pipeline of branch road buggy pipeline are linked together, little oily buggy ignition sets up in the exit of cubic tuber pipe, and the other end of branch road buggy pipeline is linked together with little oily buggy ignition. Change to the former boiler combustion tissue of boiler in order to avoid reforming transform main burner, simultaneously, oil consumption when reducing the black furnace and igniteing, reduce cost. The utility model belongs to the boiler lighting up field.

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08-08-2023 дата публикации

Power distribution network multi-time scale optimization scheduling method considering grid connection of optical storage users

Номер: CN116565874A
Принадлежит:

The invention discloses a power distribution network multi-time scale optimization scheduling method considering optical storage user grid connection, and the method comprises the steps: obtaining the branch impedance information of a power distribution network, and the number and position information of an adjustable power supply according to the structure of the power distribution network; obtaining output prediction data of each distributed photovoltaic power supply of the power distribution network and load prediction data of each node of the power distribution network on the next day; dividing day-ahead and intra-day scheduling periods, and obtaining output data of each distributed photovoltaic power supply of the power distribution network and load data of each node of the power distribution network in each scheduling period; establishing a day-ahead scheduling optimization model considering the operation economy by taking the lowest operation cost of the power distribution network ...

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02-05-2023 дата публикации

Method for controlling and setting voltage of distributed new energy transformer area

Номер: CN116054178A
Принадлежит:

The invention discloses a distributed new energy transformer area voltage control setting method. The method comprises the following steps: collecting user end voltage; evaluating the reactive power capacity of the current transformer area, and performing reactive power control on the inverter when the reactive power capacity is sufficient; when the reactive power capacity is not sufficient, all line deviation values in the transformer area are evaluated; when the deviation is small, the inverter and the transformer perform cooperative control, and when the deviation is large, the inverter performs reactive power control; and judging an over-limit condition and carrying out voltage control. According to the distributed new energy transformer area voltage control setting method provided by the invention, the transformer area reactive power adequacy and voltage regulation demand diversification of each line in the transformer area are evaluated, so that the over-limit voltage within +/-8V ...

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01-08-2023 дата публикации

Photovoltaic grid-connected system fault analysis method based on coordinate transformation and clustering analysis

Номер: CN116522588A
Принадлежит:

The invention discloses a photovoltaic grid-connected system fault analysis method based on coordinate transformation and clustering analysis. The method comprises the following steps: building a photovoltaic grid-connected inverter system simulation model according to possible fault data simulated by a simulation platform, and obtaining fault data of three types of faults through the photovoltaic grid-connected inverter system simulation model; performing coordinate transformation on the grid-connected current under various faults according to the fault data to obtain time domain characteristic values under different types of faults; converting the time domain characteristic value into a quadrature-direct axis current amplitude, and taking the quadrature-direct axis current amplitude as a fault characteristic value after the quadrature-direct axis current amplitude corresponds to the fault type; fault classification is realized through the Euclidean distance between the clustering center ...

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04-04-2023 дата публикации

Multi-cavity arc extinguishing gap capable of intelligently counting action times

Номер: CN115912060A
Принадлежит:

The invention discloses a multi-cavity arc extinguishing gap capable of intelligently counting the number of actions, which comprises a high-voltage electrode, a distribution network power transmission line and a pin type insulator, and is characterized in that the high-voltage electrode is arranged on the distribution network power transmission line and is connected with the pin type insulator in parallel; the upper part of the multi-cavity arc extinguishing unit is of a multi-cavity structure which is composed of a plurality of layers of annular structures and has an arc extinguishing function; and the arc quenching action frequency statistical unit is arranged at the lower part of the multi-cavity arc extinguishing unit and comprises an energy supply power supply, a fault current monitoring module, a data acquisition controller and a data storage and communication module. The device has the beneficial effects that the device arc quenching action times and the device arc quenching time ...

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26-05-2023 дата публикации

Thermoelectric energy conversion device for photovoltaic panel on roof of transformer substation

Номер: CN116169951A
Принадлежит:

A substation roof photovoltaic panel thermoelectric energy conversion device disclosed by the present invention comprises a heat energy unit, the heat energy unit comprises a photovoltaic assembly and a liquid cooling assembly arranged at the inner side of the photovoltaic assembly, and the first conversion unit comprises a conveying assembly arranged on the liquid cooling assembly and a valve assembly arranged on the conveying assembly. The first conversion unit comprises a conveying assembly and a movable assembly arranged on the conveying assembly, and the second conversion unit comprises a rotating wheel arranged on the movable assembly and a power generation assembly arranged on the rotating wheel, so that the photovoltaic module can be prevented from working at ultra-high temperature, the working efficiency of a photovoltaic panel is improved, and the probability that components of the photovoltaic module are damaged is reduced; collected heat energy is converted into available electric ...

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21-10-1998 дата публикации

Spring hanging rod

Номер: CN0002294624Y
Принадлежит: LI QIANMIN

The utility model relates to a product, which belongs to a daily life article, which particularly relates to a spring hanging rod, which is composed of an external sleeve pipe, an internal sleeve pipe, a transverse inserted stick, transverse inserted holes, springs, and rubber pads. The spring hanging rod is assembled as that the internal and the external sleeve pipes are provided with a plurality of inserted holes at intervals in the transverse direction; the inserted holes are mutually penetrated; the transverse inserted stick which has the corresponding size and length with the inserted holes is just inserted into the inserted holes of the internal and the external sleeve pipes; the springs are arranged between the transverse inserted stick and the end head of the internal sleeve pipe and in the external sleeve pipe; the end heads on both sides of the internal and the external sleeve pipes are provided with the rubber pads, and through making use of tension force of the springs, the ...

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04-08-2023 дата публикации

Distributed power supply access capacity planning method

Номер: CN116545006A
Принадлежит:

The invention discloses a distributed power supply admission capacity planning method, which comprises the following steps of: establishing a maximum admission capacity model according to load and line parameters of a power grid; calculating power flow by adopting a sequence component method, judging whether voltage constraint is met or not, and performing elimination; performing proportional inheritance on the individuals meeting the constraint, and crossing combinations obtained by proportional inheritance; and performing mutation operation after crossing is finished, entering a cyclic step of the genetic algorithm after a new filial generation is obtained, and outputting an optimal value after optimization is finished, namely the maximum penetration capacity of each DG in the power distribution network and a corresponding power flow result. According to the method, the genetic algorithm and the sequence component power flow algorithm are combined, so that the convergence is better and ...

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05-05-2023 дата публикации

Photovoltaic power ultra-short-term prediction method and system

Номер: CN116070509A
Принадлежит:

The invention discloses a photovoltaic power ultra-short-term prediction method and system, and the method comprises the steps: obtaining a photovoltaic power sequence of a similar power station according to the distribution condition of a photovoltaic power station; determining a highly correlated power station of the target power station by combining the photovoltaic power sequence of the similar power station and the photovoltaic power sequence of the power station to be predicted with grey correlation analysis; dynamically capturing the correlation between each characteristic variable of the target photovoltaic power station at the to-be-predicted moment and the photovoltaic power by introducing an attention mechanism; and dynamically capturing the correlation between the to-be-predicted moment and each historical moment by using a multi-layer nested space-time network, and further optimizing the prediction result by considering the change relation of the photovoltaic power along with ...

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