异步风力发电机组低电压穿越策略研究  

LVRT Strategy Research for Asynchronous Wind Generator Unit

作　　者：刘海鹏[1,2] 尹忠东[1] 李和明[1] 曹松伟[1] 

机构地区：[1]华北电力大学,新能源电力系统国家重点实验室,北京102206 [2]昆明理工大学,云南昆明650500

出　　处：《电力电子技术》2013年第11期14-16,共3页Power Electronics

基　　金：十一五科技支撑项目(2007BAA12B03)~~

摘　　要：针对异步风力发电机组的低电压穿越(LVRT)提出相应控制策略:即将静止无功发生器(SVG)与Crowbar并联接入风力发电机组与电网连接点之间。电力系统正常工作时,SVG与Crowbar不工作;电压跌落时,瞬间断开风力发电机组与系统的连接,同时投入SVG和Crowbar,通过SVG保持风力发电机组机端电压正常,通过Crowbar吸收风力发电机组的有功功率;待电压恢复后,SVG与Crowbar停止工作,同时使风力发电机组与系统重新并网。实验结果表明该控制策略可很好地解决异步风力发电机组的LVRT问题,具有研究和应用价值。A corresponding control strategy for low voltage ride through（LVRT） of the asynchronous wind generator unit is put forward.That is static var generator（SVG） and Crowbar are parallel accessed the connection points of wind ge- nerator unit and power grid.The SVG and Crowbar don＇t work when power system is normal.When the voltage drop- ping, the wind generator unit and the system are disconnected instantly, meanwhile, the SVG and the Crowbar are in- putted, through the SVG keeping the wind generator unit＇s terminal voltage normal, through the Crowbar absorbing power of the wind generator unit.After the voltage recovering, the SVG and the Crowbar stop working, the wind gener- ator unit and the system reconnect.The experimental results show that the control strategy can solve the problem of asynchronous wind generator unit＇s LVRT, it has good application and research value.

关 键 词：风力发电机组 静止无功发生器 低电压穿越 

分 类 号：TM315[电气工程—电机]