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SVC (static var compensator) allocation method for improving transient voltage security of electric distribution network

A static var compensation and transient voltage technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve the lack of quantitative indicators, no consideration of power grid disturbance, split configuration location and interaction between configuration capacity and other issues to achieve the effect of optimizing interaction effects and coordinating economic and security requirements

Active Publication Date: 2014-04-30
NARI TECH CO LTD +1
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AI Technical Summary

Problems solved by technology

Due to the lack of quantitative indicators, when using the traditional method to configure SVC, the interaction between configuration location and configuration capacity is often separated, and the static point of view is basically used to study the configuration scheme of SVC, that is, the influence of grid disturbance is not considered, and it is impossible to evaluate the impact of different configuration schemes. Control Effects in Different Transient Processes

Method used

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  • SVC (static var compensator) allocation method for improving transient voltage security of electric distribution network
  • SVC (static var compensator) allocation method for improving transient voltage security of electric distribution network
  • SVC (static var compensator) allocation method for improving transient voltage security of electric distribution network

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Embodiment Construction

[0026] Attached below figure 1 , the method of the present invention is described in detail.

[0027] figure 1 Step 1 describes the determination of the mode of operation and failure set under review. Denote the expected failure j under mode i as scenario C ij .

[0028] figure 1 Step 2 in the above describes the determination of the buses to be investigated and their evaluation indicators. Suppose there are M buses in total, record the number of the k-th bus as k, and set the binary table (V k , T k ).

[0029] figure 1 Step 3 in the above description is to use the power system transient stability quantitative analysis software FASTEST quantitative analysis software to calculate the voltage safety margin of each busbar in each scenario, and record the margin of busbar k under the scenario Cij as η ijk .

[0030] figure 1 Step 4 in the above describes the calculation of the voltage comprehensive safety margin of each busbar, and the busbar with the smallest voltage ...

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Abstract

The invention belongs to the technical fields of electrical power systems and automation thereof, and discloses an SVC (static var compensator) allocation method for improving the transient voltage security of an electric distribution network. The method is implemented based on a quantitative analysis technique for security and stability of an electrical power system through the steps of embodying the comprehensive influence of SVC allocation schemes on the improvement on system voltage security by using voltage security margin improved-value weighted indexes (referred to as comprehensive improved margins of system voltage) in multiple scenes; and on that basis above, considering the cost of each allocation scheme so as to obtain the performance-cost ratio of each allocation scheme, then, carrying out optimized allocation on the installation site and allocation capacity of an SVC through taking the largest performance-cost ratio as a goal.

Description

technical field [0001] The invention belongs to the technical field of power system automation, and more precisely, the invention relates to a configuration method of a static var compensation device (SVC) in a power distribution network. Background technique [0002] Static var compensation (SVC) can continuously adjust system reactive power within a certain range, maintain the set point voltage, and improve the safety and stability of the power grid. It has been widely used in domestic and foreign power grids. The main application areas of SVC include: 1) suppress voltage fluctuation and flicker of important substation loads; 2) configure in the system AC transmission channel, improve system stability, and then increase transmission capacity; 3) configure in weak areas to ensure safe and stable grid voltage Wait. [0003] It is not difficult to understand that configuring SVCs with different capacities at different sites has different effects, and the configuration of SVC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 刘福锁李威方勇杰袁虎玲李兆伟罗剑波马覃峰孙斌林成
Owner NARI TECH CO LTD
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