全网无功优化的变电站电压无功控制策略

Strategy of voltage and reactive power control on global optimization control

九区图是以工作点是否位于最优控制区为启动控制判据的无功优化调控策略;五区图是一种基于动作效果预算,以操作优劣距离为判据,面向VQC装置的调控策略;针对五区图的边界盲区缺乏明确的动作判据的缺陷,提出了九区图五区图组合调控策略;对于全网的变电站,根据设定的最优限值曲线,按照九区图判断各变电站的无功调压设备的工作点区域及启动区的上下限,仅对有越限的变电站按照五区图进行VQC装置的调控,既可减少控制变量的频繁操作,又可保证全网电压的质量和全网潮流的最优分布。

Nine-zone theory is optimization of reactive power control strategy which takes the operating point whether is located the superior control area as the start control criterion. Five-zone theory is one kind regulative strategy based on the movement effect, which adopts the criterion Of operation quality distance and faces VQC installment. In view of the boundary blind area of five-zone theory lacks of the explicit movement criterion, this paper presents nine-zone theory and five-zone theory combination control strategy.According to the most superior limiting value curve designed, it judges each substation the operating point region and start up limits of reactive power and voltage based on nine-zone theory in the entire net transformer substation. The substation over limits are adjusted using VQC device by five-zone theory, It can not only reduce the operation of control variable, but also make sure the voltage quality and optimal power flow of the whole network.