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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 25. Отображено 25.
23-06-2023 дата публикации

Transient voltage stability control method for coordinating excitation and reactive compensation of generator

Номер: CN116316662A
Автор: XIONG HONGTAO, ZHANG JIANCHENG, ZHANG BOXIONG, XUE ANCHENG, HUA WEN, LOU BOLIANG, NI QIULONG, YANG YING, LI YECHENG, WANG JIAWEI, KONG HE, LIN JINDIAN, LU JIAHUA, WANG ZILONG, HU MINGKANG, WANG ZONGHENG, HE JIXIANG
Принадлежит:

The invention discloses a transient voltage stability control method for coordinating generator excitation and reactive compensation. In the aspect of transient voltage stability control of a receiving-end power grid, reactive power optimization is carried out based on an index which cannot quantitatively evaluate the transient voltage stability margin, and the transient voltage stability of a system is difficult to effectively improve. According to the technical scheme, firstly, a wide-area synchronous phasor measurement device obtains transient voltage data of a receiving-end power grid, a transient voltage evaluation index is calculated, and a candidate reactive compensation node and a candidate control power plant are selected according to the transient voltage evaluation index; then, calculating compensation sensitivity and parameter adjustment sensitivity, and determining a final reactive compensation node and a parameter adjustment control power plant; constructing a constraint equation ...

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Номер записи: 1
16-06-2023 дата публикации

Distributed power distribution network reactive voltage intelligent control method of polynomial mathematical model

Номер: CN116264406A
Автор: CHEN SHAOYU, WU CHANG, LI ZHEN, FANG LUE, SU YIFANG, NI QIULONG, SHI BOLONG, HUANG YANJIE, WU SHUIPING, XU ZHAN, ZHOU HUIZHONG, REN XIANTING, LIU YIBIN, YANG QINGYUN, XIA HUIFENG, ZENG JIANBIN, XU YI, XU HONGQUAN, YANG XIANGMING, FANG JIAN, HE JIANMING, CHENG XIAOBIAO, XU BIN, ZHOU QIMING
Принадлежит:

The invention discloses an intelligent reactive voltage control method for a distributed power distribution network based on a polynomial mathematical model. The method comprises the steps of obtaining a basic model and performing initial detection, constructing an artificial intelligence decision variable, generating a polynomial measurement mathematical model and a target line number, performing optimization calculation and outputting a result. Reactive voltage control of the active power distribution network containing the distributed power supply and the distributed reactive power compensation device under the condition of multi-source measurement operation is realized by adopting an artificial intelligence genetic algorithm, and the problem that the distributed active power distribution network cannot work under the condition of multi-working-condition, multi-time-scale and multi-source measurement operation is solved. The reactive power of the power distribution network is difficult ...

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Номер записи: 2
26-05-2023 дата публикации

DFIG sequence impedance model identification method and system

Номер: CN116167232A
Автор: MA JUNCHAO, LI HAN, WANG CHENXU, LI MENG, YUK SEUNG-WOO, PENG YAN, NIAN HENG, WANG LONGFEI, NI QIULONG, ZHOU JINGHAO, XU QUNWEI, SUN JINGLIANG
Принадлежит:

The invention discloses a DFIG sequence impedance model identification method and system. According to the method, firstly, reasonable selection of model input variables is guaranteed through a knowledge-driven method, so that an impedance model with high precision is built, and the requirements of a machine learning model for the size and quality of a data sample are reduced; then an impedance identification model is built through a data driving method, and the impedance identification model is trained by utilizing simulation model data, so that harmonic disturbance does not need to be continuously injected into an actual operation system, the method is suitable for the actual situation of confidentiality of internal information of a DFIG unit in an engineering field, and external interference on actual system operation is also reduced; and finally, an impedance identification model is trained through data, so that the accuracy of model output is ensured.

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Номер записи: 3
08-10-2014 дата публикации

High-reliability unified power flow controller suitable for double-circuit line

Номер: CN104092234A
Автор: TIAN JIE, SHEN QUANRONG, LI HAIYING, LI JIHONG, SUN WEIZHEN, NI QIULONG, ZHANG JING, YE LIN, WANG CHAO, YANG YING, DONG YUNLONG, PAN LEI
Принадлежит:

The invention provides a high-reliability unified power flow controller suitable for a double-circuit line. The high-reliability unified power flow controller comprises at least one parallel transformer, four converters, at least two series transformers, a parallel-side back brake loop, a series-side back brake loop and a direct-current public bus. At least one side of each series transformer is connected with at least one set of bypass switches in parallel. The alternating current side of at least one converter is connected with at least one series transformer through the series-side back brake loop to be connected into the line in series. The alternating current side of at least one converter is connected with the at least one parallel transformer through the parallel-side back brake loop to be connected into an alternating current system. The direct current sides of the converters are connected to the direct-current public bus through change-over switches. By means of the structure, ...

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Номер записи: 4
23-04-2014 дата публикации

Electric power system recovery method based on node importance degree

Номер: CN103746366A
Автор: SUN WEIZHEN, WANG CHAO, NI QIULONG, ZHANG CAN, WU YE, LIN ZHENZHI, WEN FUSHUAN, XIANG ZHONGMING, YANG YING, ZHANG JING
Принадлежит:

An electric power system recovery method based on node importance degree relates to an electric power system recovery method. At present, the evaluation of the node importance degree does not consider the topology characteristic of a network, so that a decision-making misplay is caused easily. The electric power system recovery method based on the node importance degree of the present invention comprises the following steps of calculating a topology connectivity loss regret value and a node recovery cost increase regret value; calculating the node importance degree; determining the recovery sequence of the generator sets; determining a candidate path; calculating an average importance degree and selecting a recovery path; classifying the recovered node and line into an electrified area; if a segment of line is failed during the recovery process, determining a new recovery path again; when the power supply of the generator sets are recovered, ending work, if not determining the generator ...

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Номер записи: 5
23-04-2014 дата публикации

Optimal calculation method for thermostabilization quota of power grid

Номер: CN103745077A
Автор: SUN WEIZHEN, YE LIN, NI QIULONG, YANG YING, WANG CHAO, ZHANG JING, WENG GEPING, LI FENGWEI, GONG XIANGYANG, WANG WEI, GUO RUIPENG, WANG KANGYUAN, DING YING, WANG JIANLIN
Принадлежит:

The invention discloses an optimal calculation method for the thermostabilization quota of a power grid and relates to an automatic power grid control method. The current calculation process of the thermostabilization quota of the fracture surface is tedious and huge in workload, and the correctness of the calculation results is closely relevant to the experience of professionals. The optimal calculation method for the thermostabilization quota of the power grid is characterized in that the calculation method for the thermostabilization quota of the fracture surface is shown as the formulae in the specifications; the formula (1) is a target formula, and the formulae (2), (3) and (4) are constraint formulae. The four formulas form a linear programming problem, and the thermostabilization quota is calculated with a linear programming interior point method. Through the technical scheme, the fracture surface needing to be calculated can be found automatically, the quota optimization result ...

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Номер записи: 6
09-05-2023 дата публикации

Virtual power plant optimization scheduling method comprehensively considering orderly charging of electric vehicles

Номер: CN116090739A
Автор: SUN JINGLIANG, HU CHANGHONG, XIANG YEYUN, LIU JINYUAN, KONG FANFANG, LAI HUANHUAN, CHEN MENGXIANG, ZHU QIWEI, DONG ZHIHUI, SHI ZHENGCHAI, NI QIULONG, YE LIN, LIU HUILE, XI HONGLEI, YU KAI, YANG JIANYOU, XUE DALI, ZHENG JUNXIANG, ZANG YINING
Принадлежит:

The invention discloses a virtual power plant optimization scheduling method comprehensively considering electric vehicle ordered charging, which comprises the following steps: S1, establishing an objective function and constraint conditions of an electric vehicle ordered charging control scheduling model, constructing an electric vehicle ordered charging model based on a price factor, and determining the load demand of an electric vehicle accessed to a virtual power plant; s2, constructing a virtual power plant dispatching model containing the electric vehicle, which comprehensively considers revenue maximization and new energy consumption, fully considering the consumption capabilities of wind power generation and photovoltaic power generation, and coordinating power and electric energy matching between the electric vehicle and the new energy by coordinating energy storage equipment; s3, providing a dynamic weight chaos-particle swarm algorithm for optimization solution, and further improving ...

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Номер записи: 7
23-06-2023 дата публикации

Wind power plant fan collection system protection configuration and parameter setting method

Номер: CN116316488A
Автор: YANG YING, YANG XIAOLEI, HUANG JINBO, NI QIULONG, YIN WEIBIN, XIANG ZHONGMING, HAN ZHONGJIE, YE LIN, SHI BOLONG, JIN LIXIANG, FANG JIANGXIAO, TU YIYAN, TAO HUAN, YUAN GUOZHEN, CHEN CHAOMIN
Принадлежит:

The invention discloses a wind farm fan collection system protection configuration and parameter setting method. In order to solve the problem that in the prior art, due to the fact that a calculation method based on a wind field fault and a new energy field short circuit is not clear enough, setting configuration cannot be perfected when a power grid breaks down, the method comprises the steps that according to a power grid conventional symmetric short-circuit fault and an asymmetric short-circuit fault, performing short-circuit current expression analysis on the single doubly-fed wind turbine generator with crowbar protection under the two short-circuit faults; after short-circuit current analytic expressions of the single doubly-fed wind turbine generator set under the two faults are obtained, short-circuit currents of the wind power plant collection line under the two faults are obtained through further analysis; and performing protection configuration and setting on the wind power ...

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Номер записи: 8
22-10-2014 дата публикации

Convertible static synchronous series compensator

Номер: CN104113060A
Автор: PAN LEI, DONG YUNLONG, LU YU, TIAN JIE, LI HAIYING, SHEN QUANRONG, LI JIHONG, SUN WEIZHEN, NI QIULONG, ZHANG JING, YE LIN, WANG CHAO, YANG YING
Принадлежит:

The invention provides a convertible static synchronous series compensator. As to N circuits, the convertible static synchronous series compensator comprises at least one parallel transformer, a voltage source converter, N series transformers and at least (N+1) changer-over switches, wherein at least one side of each series transformer is in parallel connection with at least one bypass switch, an alternating current side of the voltage source converter is connected with the at least one parallel transformer through at least one change-over switch and then parellelly connected with an alternating current system, meanwhile, the alternating current side of the voltage source converter is connected with the N series transformers through at least N change-over switches, and the N series transformers are serially connected with the N circuits respectively. According to the convertible static synchronous series compensator, by means of only one voltage source converter, alternating current voltage ...

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Номер записи: 9
10-12-2014 дата публикации

Flexible direct-current transmission system coupled transformer tap adjusting method

Номер: CN104201683A
Автор: WANG NANNAN, TIAN JIE, DONG YUNLONG, LIU HAIBIN, LU YU, YANG YONG, NI QIULONG, SUN WEIZHEN, ZHANG JING, HUANG XIAOMING, LU YI, QIU PENG, HUA WEN, LIU MINGKANG, WANG DONG, FEI JIANPING, CHEN HUIJUN
Принадлежит:

The invention discloses a flexible direct-current transmission system coupled transformer tap adjusting method. The method includes that when modulation degree of a converter surpasses the upper limit, a tap is adjusted towards the voltage direction of the coupling variable valve lowering side, and if adjustment fails, capacitive reactive instructions of the converter are actively reduced; when the modulation degree of the converter is lower than the upper limit, the tap is adjusted towards the voltage direction of the coupling variable valve rising side, and if adjustment fails, the capacitive reactive instructions of the converter are actively increased. By the method, the adjustment degree of the converter can be effectively adjusted even when the tap fails or the tap position surpasses the limits, and stable operation performance of the converter can be guaranteed.

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Номер записи: 10
05-02-2014 дата публикации

Power system fault diagnosis method allowing warning information uncertainty to be considered

Номер: CN103558510A
Автор: WANG CHAO, LI YINGYI, SUN WEIZHEN, WEN FUSHUAN, ZHENG XIANG, ZHANG YAN, LI JIHONG, NI QIULONG, XIANG ZHONGMING, YE LIN, WU LIFENG, CHEN MIN, ZHAO PU, ZHAO YIYAN, CHANG YONG, ZHAN ZHENBIN
Принадлежит:

The invention provides a power system fault diagnosis method allowing warning information uncertainty to be considered, and relates to a power system fault diagnosis method. At present, when faults occur, protective relays and circuit breakers are likely to operate mistakenly or reject operation, untimely uploading or distortion or missing or other situations are likely to occur in an alarm uploading process, and accurate diagnosis results cannot be obtained. The power system fault diagnosis method comprises the following steps that 1) according to protective-relay action information, circuit-breaker action information and static power grid topological data after the faults occur, power-outage regions before and after the faults are formed, and fault regions are identified automatically; 2) protective-relay configuration information is combined, information content loss is calculated in an information content loss algorithm during fault diagnosis, an objective function is formed, and a ...

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Номер записи: 11
31-12-2014 дата публикации

WLAV (Weighted Least Absolute Value) robust estimation method based on multi-predication-correction interiorpoint method

Номер: CN104252571A
Автор: SUN WEIZHEN, WANG CHAO, NI QIULONG, YE LIN, ZHAN ZHENBIN, WEI ZHINONG, SUN GUOQIANG
Принадлежит:

The invention provides a WLAV (Weighted Least Absolute Value) robust estimation method based on a multi-predication-correction interiorpoint method and relates to an electric system operation and control method. Weighted least square state estimation is adopted for state estimation, but the estimation precision is difficult to further improve. The method comprises the following steps: 1) acquiring electric system parameters; 2) acquiring detection data; 3) initializing; 4) applying each quantity measurement Hessian matrix memory space and solving; 5) calculating a duality gap CGAP which is equal to alphI+betaU, judging whether meeting conditions that CGap is less than epsilon or K is less than Kmax; 6) predicating a step, namely setting a perturbation factor mu as zero, predicating according to formulae and solving out an affine direction; 7) correcting the step; 8) judging that a correction frequency counter t is less than 4; 9) solving out an equation as shown in the specification ...

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Номер записи: 12
16-04-2014 дата публикации

Province, city and county integrated operation method of power grid

Номер: CN103730954A
Автор: SUN WEIZHEN, YE LIN, NI QIULONG, YANG YING, WANG CHAO, ZHANG JING, WENG GEPING, LI FENGWEI, GONG XIANGYANG, WANG WEI, GUO RUIPENG, WANG KANGYUAN, DING YING, WANG JIANLIN
Принадлежит:

The invention discloses a province, city and county integrated operation method of a power grid, and relates to an electric power system dispatching control management method. At present, province models and city models are not consistent, provinces and cities can not interact in model, and model splicing is difficult. The province, city and county integrated operation method of the power grid is characterized in that an electrical equipment dispatching control system comprises a province level dispatching control system and a city level dispatching control system, an electrical equipment library is divided into a plurality of levels according to high-low voltages and comprises a province level power grid equipment database and a city and county level equipment database, the province level power grid equipment database and the city and county level equipment database are matched with the province level dispatching control system and the city level dispatching control system respectively ...

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Номер записи: 13
05-02-2014 дата публикации

Scheduling plan security correction method and system

Номер: CN103559582A
Автор: LI YINGYI, XU TAISHAN, SUN WEIZHEN, BAO YANHONG, WANG CHAO, XU WEI, ZHOU HAIFENG, NI QIULONG, ZHENG XIANG, ZHAN ZHENBIN, WANG SHENGMING, ZHAO YIYAN, GUO JIAN, CHEN YINGJIE
Принадлежит:

The invention discloses a scheduling plan security correction method and system. According to the method, when scheduling plans of certain types are received, fault screening can be correspondingly carried out on plan modes in the scheduling plans according to preset candidate fault screening cross section queues, then the plan modes are grouped, plan modes having priority to carrying out security and stability assessment in each group are determined according to distribution conditions of plan modes capable of being screened and selected in each group, the plan modes are assessed, fault screening and assessment are carried out on the other plan modes in each group on the basis of assessment results of the assessed plan modes, and assessment after fault screening is carried out on the plan modes in each plan mode group as far as possible. The candidate fault screening cross section queues are synchronously updated by means of data of the assessment results of the security correction to ...

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Номер записи: 14
23-04-2014 дата публикации

Electric power system fault diagnosis method based on electrical quantity and state quantity

Номер: CN103743963A
Автор: DAI YAN, SUN WEIZHEN, NI QIULONG, WANG CHAO, WEN FUSHUAN, XIANG ZHONGMING, DONG MING, ZHANG YONG, HUANG YUANPING, YANG YING, ZHANG JING, GU WEI
Принадлежит:

An electric power system fault diagnosis method based on an electrical quantity and a state quantity relates to an electric power system fault diagnosis method. At present, the electric power system fault diagnosis generally only utilizes the action information of protectors and breakers, is single in information source and low in information redundancy, and can not obtain a clear diagnosis result. The electric power system fault diagnosis method based on the electrical quantity and the state quantity of the present invention comprises the following steps of automatically identifying a fault region, and obtaining the newly added power-off elements to form the fault region according to the action information of the protectors, the action information of the breakers, the electrical quantity information and the static power grid topology data; establishing a fault diagnosis analytical model and forming the fault diagnosis analytical model according to the electrical quantity judgement, the ...

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Номер записи: 15
27-04-2011 дата публикации

Security and stability control and defense method for power grid

Номер: CN0102035193A
Автор: Zhu Bingquan, Ni Qiulong, Fang Tianyu, Wang Hanyun, Tang Ming, Wu Mingming, Xia Shangxue, Xu Ke, Ren Zuyi
Принадлежит:

The invention discloses a security and stability control and defense method for a power grid. The method comprises the following steps of: 1) analyzing possible stability problems according to the power grid structure of a regional power grid connected through contact circuits of different voltage levels and the load tide distribution condition; 2) determining a stable control system scheme after the regional power grid has an accident according to the magnitude of actual load tide of the contact circuits, and reasonably setting arrangement points of a main station and sub stations of stability control devices; 3) organizing channel contacts among the stability control devices of the stations after the arrangement points of the main station and the sub stations of the stability control devices are determined to realize information exchange and stability control measures among the stability control devices of the stations; and 4) mainly considering a control measure for residual low-voltage ...

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Номер записи: 16
18-03-2015 дата публикации

Online on-off operation checking method based on maintenance plan

Номер: CN104424602A
Автор: NI QIULONG, YE LIN, XIANG ZHONGMING, ZHOU SHENGMIAO, RAO MINGJUN, ZHOU HUIZHONG, XU HONGQUAN
Принадлежит:

An online on-off operation checking method based on a maintenance plan relates to an online checking method. At present, scheduling personnel can confirm on-off operation by manually searching the maintenance plan, which is low in efficiency. The method comprises the following steps: 1) structuring the maintenance plan: standardizing the maintenance plan according to structuring requirements, and structuring maintenance plan service stop date, plan approving time, factory names and main work content in the maintenance plan; 2) capturing switch displacement warning information: when a switch displacement signal is generated, transmitting the switch displacement warning signal according to a naming structure; 3) carrying out online checking on the on-off action based on the maintenance plan: scanning the maintenance plan items and matching the on-off action; and 4) outputting the maintenance plan items corresponding to the on-off action: when the on-off action is caused by maintenance, outputting ...

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Номер записи: 17
24-06-2015 дата публикации

Wind power plant equating method based on low voltage ride through period control strategy

Номер: CN104732008A
Автор: HOU JUNXIAN, NA ZHIQIANG, SUN WEIZHEN, WAN LEI, NI QIULONG, WANG YI, ZHANG JING, DONG YIFENG, YE LIN, WANG HONGFU, WANG CHAO, YANG YING, SHI BOLONG, DU SAN'EN, FENG JING
Принадлежит:

The invention provides a wind power plant equating method based on a low voltage ride through period control strategy. The method comprises the following steps that an active current control value and a reactive current control value of a wind generator set are calculated; the sum of actual active current control values of a wind power plant and the sum of actual reactive current control values of the wind power plant are calculated; the sum of equivalent active current control values of the wind power plant and the sum of equivalent reactive current control values of the wind power plant are calculated; the final equivalent unit number of the wind generator set is determined. The wind power plant equating method based on the low voltage ride through period control strategy is based on a scalar multiplication method, and is a method for equating the wind power plant to a plurality of units which are completely the same and determining the reasonable number of the equivalent units, and the ...

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Номер записи: 18
30-04-2014 дата публикации

On-line setting method for load reduction amount of low-frequency load-reducing basic wheels of electric system

Номер: CN103762590A
Автор: LI JIHONG, XU TAISHAN, SUN WEIZHEN, BAO YANHONG, NI QIULONG, XU WEI, WANG CHAO, ZENG XINGJIA, XIA XIAOQIN, CHEN JIN
Принадлежит:

The invention relates to a systemic analysis method and discloses an on-line setting method for the load reduction amount of low-frequency load-reducing basic wheels of an electric system. At present, a practical method for directly setting the low-frequency load reduction amount based on detailed time-domain simulation is not proposed. The on-line setting method comprises the steps of classifying preconceived faults with the frequency reduction range larger than a frequency deviation threshold value into to-be-checked fault sets of corresponding plan modes according to the plan modes of all set time periods, calculating the occurrence probability of the faults according to the duration time of the plan modes, determining the maximum values of the load reduction proportions of low-frequency load-reducing devices and the maximum value of the load reduction proportion of each wheel, determining the load reduction amount of each low-frequency load-reducing device one by one until the transient ...

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Номер записи: 19
23-04-2014 дата публикации

Intelligent low-frequency low-voltage load shedding optimization method of power grid

Номер: CN103746367A
Автор: SUN WEIZHEN, YE LIN, NI QIULONG, YANG YING, WANG CHAO, ZHANG JING, WENG GEPING, LI FENGWEI, GONG XIANGYANG, WANG WEI, GAN DEQIANG, WANG ZHEN
Принадлежит:

An intelligent low-frequency low-voltage load shedding optimization method of a power grid relates to an automatic control method of the power grid. At present, a low-frequency load shedding method can not adapt to the characteristics of large scale, dispersity, multilayer, wide geographical distribution and fast transient process of an electric power system, thereby causing the problems that the power-off loss is large and the recovery performance of a system is poor. The intelligent low-frequency low-voltage load shedding optimization method of the power grid of the present invention is characterized in that the target functions of the low-frequency load shedding are that as described in the specification, and the target functions satisfy the conditions as described in the specification: |f0-ftf| Подробнее

Номер записи: 20
29-10-2014 дата публикации

Convertible static compensator applicable to a plurality of lines

Номер: CN104124694A
Автор: PAN LEI, TIAN JIE, SHEN QUANRONG, LI JIHONG, SUN WEIZHEN, NI QIULONG, ZHANG JING, YE LIN, WANG CHAO, YANG YING, LI HAIYING, LU YU, DONG YUNLONG
Принадлежит:

The invention provides a convertible static compensator applicable to a plurality of lines. As for N lines, the convertible static compensator comprises at least one parallel connection transformer, N current converters, a back brake loop and at least N series connection transformers, at least one side of each series connection transformer is in parallel connection with at least one by-pass switch, alternating current sides of the current converters are connected with the at least one parallel connection transformer through the back brake loop to be connected into an alternating current system, meanwhile, an alternating current side of each current converter is connected with at least one series connection transformer through the back brake loop, the series connection transformers are in series connection to be connected into corresponding lines, and direct current sides of the current converters are connected to a direct current bus or mutually connected through change-over switches. By ...

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Номер записи: 21
10-08-2011 дата публикации

Actual-measurement modeling method for prime mover and speed governor thereof of electric power system

Номер: CN0102146812A
Автор: LI JIHONG, NI QIULONG, LU CHUNLIANG, YE LIN, SUN WEIZHEN, YU CHENGLI, GU ZHENGHAO, FAN YINLONG, XU ZHENG, WU CHENG, JIHONG LI, QIULONG NI, CHUNLIANG LU, LIN YE, WEIZHEN SUN, CHENGLI YU, ZHENGHAO GU, YINLONG FAN, ZHENG XU, CHENG WU
Принадлежит:

The invention provides an actual-measurement modeling method for a prime mover and a speed governor thereof of an electric power system, belonging to the technical field of electric power systems. The invention solves the problem that the traditional prime mover and the speed governor thereof generate larger bias of a simulated calculation result due to the use of a typical model and typical parameters. The actual-measurement modeling method for the prime mover and the speed governor thereof of the electric power system comprises the following steps of: (1) collecting data; (2) establishing mathematical models of the prime mover and the speed governor thereof; (3) carrying out model selection; (4) carrying out segmented field testing on the prime mover and the speed governor thereof; (5) carrying out segmented parameter recognization to obtain parameters of each segment; (6) screening data before the population parameters are recognized; (7) carrying out population parameter recognization ...

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Номер записи: 22
08-08-2023 дата публикации

Power grid broadband oscillation monitoring method and stability control device

Номер: CN116566041A
Автор: YANG XIAOLEI, YE LIN, JIN LIXIANG, LU MENGKE, NI QIULONG, FANG QIN, HAN ZHONGJIE, HUANG JINBO, YANG YING, XU YONG, WANG YUEQIANG, LI ZHENJIA, LIU DONGYANG, WANG JUAN, LI ZHUKUN
Принадлежит:

The invention discloses a power grid broadband oscillation monitoring method and a stability control device, and the method comprises the steps: collecting the real-time operation data of a power grid, carrying out the preprocessing of the operation data, dividing the preprocessed operation data into different signal groups according to the frequency, dividing a CPU into a plurality of interruptions at different time intervals, respectively carrying out data processing on each signal group in different interruptions, respectively filtering each signal group according to the frequency characteristic of each signal group, and respectively calculating the oscillation component of the filtered signal group; sending out an oscillation alarm signal according to the calculation result of the oscillation component of each signal group; each interrupt is provided with a computing cache data window for data processing. Operation data signals are grouped and respectively processed according to different ...

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Номер записи: 23
09-05-2023 дата публикации

Transient voltage stability monitoring bus analysis method

Номер: CN116093952A
Автор: NI QIULONG, SUN JINGLIANG, YE LIN, YANG YING, LIU HUILE, ZHOU TAIBIN, LIN GUOSONG, ZHOU ZHENGYANG, HU CHANGHONG, XIANG YEYUN, ZHOU JINGHAO, SHI BOLONG, ZHANG XIAOCONG, LU QIANYI, LAI HUANHUAN, KONG FANFANG, SHI ZHENGCHAI, YI YONGLI, LIU JINYUAN, CHEN MENGXIANG
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The invention discloses a transient voltage stability monitoring bus analysis method. The method comprises the following steps: acquiring voltage partition information of each automatic voltage control partition and active power of each node; according to the voltage partition information of each automatic voltage control partition, the active power of each node and a preset fault, determining a weakness coefficient of each automatic voltage control partition; screening out a to-be-monitored partition from the automatic voltage control partitions according to the weakness coefficient; calculating the electrical distance between the dynamic reactive power reserve of each node in the to-be-monitored partition and the fault point of the preset fault; according to the electrical distance between the dynamic reactive power reserve and the fault point and the active power of each node in the to-be-monitored partition, clustering the nodes of the corresponding to-be-monitored partition to obtain ...

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Номер записи: 24
18-07-2023 дата публикации

Regional power distribution network collection point voltage reactive coupling characteristic evaluation method

Номер: CN116452025A
Автор: YANG XIAOLEI, NI QIULONG, YANG YING, HUANG JINBO, YE LIN, HAN ZHONGJIE, XIANG ZHONGMING, YIN WEIBIN, ZHOU JINGHAO, TAO HUAN, LU MENGKE, JIN LIXIANG, TU YIYAN, ZHANG HONGYING, CHEN NING
Принадлежит:

The invention relates to a regional power distribution network convergence point voltage reactive coupling characteristic evaluation method, which comprises the following steps of: selecting a large amount of historical operation data and simulation result data; comprising topological structure feature models of the regional power distribution network at different moments, correlation between a distributed power supply and a load in the regional power distribution network, and values of voltage and reactive current of the collection point under different power grid disturbance effects, and a voltage and reactive coupling relation of the collection point of the regional power distribution network presented in a coefficient table form is established. And finally, based on the established voltage-reactive current mathematical coupling model of the collection point of the regional power distribution network, obtaining the internal topological structure of the regional power distribution network ...

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Номер записи: 25