大电网高压电抗器优化配置研究

Optimization Configuration of High Voltage Reactors in Large Power Grid

目前电网大量高压电抗器主要用于抑制工频过电压和潜供电流,起不到调压作用,随着电网结构调整,部分高压电抗器无法发挥作用。为了提高资产使用效率,提出了一种高压电抗器优化配置方法,该方法综合考虑线路的电容效应、网损以及两端厂站现有感性无功补偿度;以最大电压波动、最大电压偏移、平均网损以及无功调节装置投切动作量作为评价指标建立了用于评价高压电抗器配置方案优劣的无功电压综合评价体系,并引入基于指标隶属度方差进行赋权的决策策略选择最优的高压电抗器配置方案。最后结合陕西电网高压电抗器配置问题,证明了所提方法有效可行。

At present,high voltage （HV）reactors are mainly used to restrain the power frequency overvoltage and secondary arc current,not for the voltage control purpose.With the spreading and changing of power grid,part of HV reactors cannot be put into operation.In order to improve the use efficiency of assets,an optimization configuration method of HV reactor was proposed.Firstly,this method comprehensively considered the capacitance effect and power loss of transmission lines,as well as the existing inductive reactive power compensation degree of the two end stations of the lines;and set of alternative configuration schemes were designed for HV reactors.Then,a comprehensive evaluation system of reactive voltage was established for the configuration schemes of HV reactors with considering the maximum voltage fluctuation and deviation,average power loss,and switching action quantity of inactive power adjusting devices as evaluation indexes.A weighted method based on the variance of fuzzy memberships was introduced for a more scientific and objective optimal scheme decision strategy.Finally,combined with the configuration problem of HV reactors in Shaanxi power grid, the proposed method was proved to be effective and feasible.