一种链式STATCOM故障链节在线旁路控制方法  

An Online Bypass Control Method of Fault Chain for Cascade STATCOM

作　　者：刘锦宁 汪万伟 何师 

机构地区：[1]广东电网有限责任公司东莞供电局,广东东莞523000 [2]荣信电力电子股份有限公司,辽宁鞍山114051

出　　处：《电力电子技术》2016年第8期38-40,43,共4页Power Electronics

基　　金："十一五"国家科技支撑计划项目(2007BAA10B02)~~

摘　　要：结合500 kV水乡变电站加装35 kV/±200 Mvar静止无功补偿器(STATCOM)动态无功补偿设备工程,提出一种故障链节在线旁路控制算法,从而避免大功率链式STATCOM因H桥故障频繁退出运行,大幅提高了装置运行可靠性。在线旁路控制算法首先将故障链节H桥上桥臂或下桥臂功率开关器件导通,使该故障链节从换流链中隔离,同时在线计算并更新故障相载波移相角和调制波幅值以保证链式STATCOM输出电压不变。试验结果表明,提出的在线旁路控制算法正确有效,具有很好的工程运用价值。Combined with the newly put into operation static var compensator（STATCOM） project of 500 kV Shui Xi- ang substation 35 kV/±200 Mvar STATCOM, an online bypass control method is proposed, in order to avoid the ca- scade STATCOM quit running when a single H-bridge is in fault, with greatly improves the reliability of the device. Firstly, switch on the fault chain＇s all upper and lower switches, so the fault chain can be isolated from the commu- tation chain.Secondly, update the fault phase carrier phase shift angle and the amplitude modulation by online calcu- lation,so the output voltage amplitude can be maintained constant.The experimental results show that the proposed online bypass control method is correct and effective, this control scheme has much value in application.

关 键 词：静止无功补偿器 链式 H桥 在线旁路 

分 类 号：TN782[电子电信—电路与系统]