变电站电压无功综合控制系统研究综述

Review of Reactive Power Control System in Substations

无功补偿是保证电力系统运行稳定,降低线路损耗,提高经济效益和保证电压质量的基本条件。九区图划分的电压无功调节判据,实际运行时在临界区域容易造成振荡和装置动作频繁,针对传统"九区图"控制策略的不足,本文引入了基于变量计算的VQC策略,通过这种策略算法得出变压器分接头和电容器投切开关的动作方案。在不降低电压无功控制效果,同时能够减少有载调压器分接头和并联电容器组的调节次数,提高了电气设备使用寿命。

Reactive compensation is to guarantee the system runs stably and reduce power line loss,improve the economic benefit and ensure the basic conditions of voltage quality. Voltage reactive-power integrated control system＇s goal is to ensure voltage qualified,reactive power based on the basic balance to minimize regulation frequency. Nine area graph partition voltage reactive adjusting criterion,when actual operation in critical regions easily cause oscillation and device is frequent,conventional nine area chart deficiency of control strategy based on variable,this paper introduces the VQC strategy,calculated by this strategy that transformer points joint and algorithm of capacitor switching action plan. the former VQC strategy in not lower than voltage reactive-power control effect also can reduce on-load pressure regulator point joint and parallel capacitor group of regulation,improving the frequency electric equipment using life.