用灵敏度法确定变电站电容器组的在线投切  

Sensitivity-based on-line adjustment of shunt capacitors in substation

作　　者：王克文[1] 张建芬[1] 杨海晶[1] 杨宛辉[1] 

机构地区：[1]郑州大学电气工程学院,河南郑州450002

出　　处：《继电器》2003年第9期15-19,共5页Relay

基　　金：河南省科技攻关项目(0224330010)

摘　　要：鉴于变电站电容器分组投切的特点,本文在一实际110kV城市电网的基础上,以网络有功损耗的降低为目标,利用无功注入的灵敏度先对各补偿点的补偿效果进行排序;进而通过准确计算确定电容器组的投切方案。同时也考虑了变压器分接头对中低压侧电压的调整。该方法可靠实用,并已应用于为南阳市城市电网开发的在线安全经济分析软件包中。Considering practical characteristic that shunt capacities in power stations are adjusted in sets, the sensitivity technique is used in this paper for the online determination of capacitor operation schemes on a practical 110 kV city power system. Under the objective function of active power loss reduction and the reactive compensation effects of buses with shunt capacitors are ordered by using sensitivities, the adjustment scheme for capacities and transformer taps is obtained from repeated load flow computation. Voltage adjustment by transformer taps at medium_low voltage supply are also considered. The presented reliable and practical approach is much suitable for online employment, and has been used in the Nanyang power system.

关 键 词：变电站 电容器组 在线投切 灵敏度法 无功补偿 电力系统 

分 类 号：TM76[电气工程—电力系统及自动化]