A Feeder Capacitor Configuration Method Applied to Online Loop Power Flow Optimization Analysis

Abstract

The invention discloses a feed line capacitor configuration method applied to on-line loop closing trend optimization analysis. The method comprises: first of all, calculating the reactive economic equivalents of points, which may be provided with compensation capacitors, on a feed line; secondly, searching for an optimal compensation point; and finally, compensating an optimum compensation capacity on the optimal compensation point of the reactive economic equivalents. According to the invention, the optimal compensation capacitor value is calculated by use of a bisection three curve approximation method for realizing optimal configuration of a feed line capacitor so that the accuracy of an on-line loop closing trend optimization analysis result is ensured.

Description

technical field [0001] The invention relates to a feeder capacitor configuration method applied to the optimization analysis of the online loop closing power flow. Background technique [0002] In order to simplify the operation mode of the power grid, suppress the level of short-circuit current, improve the reliability of the power supply of the power grid, and maintain the safe and economic operation of the power grid, the power supply and distribution networks of 110kV and below in my country generally adopt the ring network design and open-loop operation mode. When the load needs to be transferred or the power supply is to be restored after maintenance, the operation mode of closing the loop first and then releasing the loop is generally adopted to avoid power outages for users and improve the reliability of power supply for users. [0003] Due to the large loop closing power flow may be generated during the loop closing operation, which may cause equipment overload or r...

AI Technical Summary

Problems solved by technology

[0003] Due to the large loop closing current may be generated during the loop closing operation, causing equipment overload or relay protection action, resulting in loop closing operation failure or power failure

If the protection refuses to operate, it may cause equipment damage or the upper level protection action, expanding the scope of power failure

Since the operation status of the power grid after loop closure is opaque to dispatchers, it is difficult for dispatchers to prejudge the reliability of loop closure operation based on experience. It is likely that equipment overload or protection trips after loop closure will occur due to excessive loop closure power flow. Ultimately, the loop closing operation fails, causing power outages for users or damage to electrical equipment, etc.

Due to the difficulty of directly predicting the power flow of the closed loop, in order to prevent equipment damage, sometimes the principle of break before make is used to operate, resulting in short-term power outages for users, which sacrifices the reliability of power supply of the grid, which is unacceptable in important load power supply areas such as urban areas of

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