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Optimized check method of short-circuit current limiting measure

A technology of short-circuit current limitation and short-circuit current, which is applied to emergency protection circuit devices, electrical components, and circuit devices for limiting overcurrent/overvoltage, and can solve problems such as complex system simulation and difficulty in expressing integer optimization models

Active Publication Date: 2012-10-17
NORTH CHINA ELECTRICAL POWER RES INST +2
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Problems solved by technology

It is difficult to deal with such constraints, because the calculation of these constraints involves complex system simulation, which is difficult to express in an integer optimization model

Method used

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  • Optimized check method of short-circuit current limiting measure
  • Optimized check method of short-circuit current limiting measure
  • Optimized check method of short-circuit current limiting measure

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Embodiment Construction

[0023] The content of the present invention will be further described below by taking the optimized configuration scheme of the short-circuit current limiting measures for the 500kV grid frame of the North China Power Grid as an embodiment of the present invention.

[0024] Taking the four constraints of static safety, transient safety, short-circuit current limiting effect and operating economy as the factor set U, two sub-factors of line or transformer overload and bus voltage over-limit are considered in the factor subset static safety. One sub-factor of the maximum generator power angle difference is considered in the transient safety of the factor subset, and four sub-factors of 220kV three-phase and single-phase short-circuit current and 500kV three-phase and single-phase short-circuit current are considered in the short-circuit current limiting effect of the factor subset. , two sub-factors, switchgear investment and system network loss, are considered in the factor subs...

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Abstract

The invention provides an optimized check method of short-circuit current limiting measure based on multilevel fuzzy comprehensive evaluation. The method comprises the steps of: automatically computing the current limiting measure configuration, researching a multi-objective optimized short-circuit current limiting configuration proposal with economy, safety and reliability, and then checking constraints such as voltage stability, transient stability and operation reliability. With the method, the optimized check of the current limiting proposal can be automatically performed to obtain a clear and visual optimized configuration result.

Description

technical field [0001] The invention belongs to the technical field of power system security defense, and in particular relates to a method for optimizing and verifying short-circuit current limiting measures. Background technique [0002] The traditional method of limiting short-circuit current is usually to calculate and compare various current limiting measures one by one, so there are problems such as cumbersome calculation methods and low calculation efficiency, and it is impossible to consider safety and economic issues at the same time. The solution of comprehensive measures is often achieved by synthesizing several limited current-limiting measures based on experience when a single current-limiting measure cannot meet the requirements, so it is not easy to form an optimized measure configuration scheme. The research on the optimal configuration of various current limiting measures is still in its infancy. [0003] Reference [1] presents an automatic optimal configur...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02
Inventor 李笑蓉刘文颖沈卫东谢昶李群炬王佳明徐华梁才李付强但扬清刘辉于会泉王非杨楠梁纪峰金娜李志勇晁进王鹏翔梁峰王莹莹门德月杜珣徐鹏曹俊龙葛润东
Owner NORTH CHINA ELECTRICAL POWER RES INST
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