变电站电压无功综合控制策略的改进

IMPROVEMENT OF INTEGRATED CONTROL STRATEGIES FOR VOLTAGE AND REACTIVE POWER IN SUBSTATIONS

结合浙江宁波中山变和邱隘变的运行情况，本文对现行九域区控制方式VQC的控制策略进行了分析，并提出了改进意见。改进后的控制策略可以减少变压器有载调压的次数，并与改善变电站各时段的功率因数趋于统一，使VQC的动作选择性更接近于人工控制。

Combining with operation situation of VQC (integrated control of voltage and reactive power)in Zhongshan substation and Qiuai substation,this paper analyzes control strategies of VQC based on the relaion between U and cos , puts forward the measures of improving these control strategies. The improved control strategies can decrease the times of on-load voltage regulation of transformer, improve the power factors of substation in different time period, and make the selectivity of VQC operation more close to that of manual VQC operation.