电力系统保护与控制2012，Vol.40Issue(15)：99-103,5.
基于无功判定法的Crowbar保护电路退出控制
Crowbar protection circuit quitting control based on the reactive power judgment
摘要
Abstract
"Difficult grid-connection" has become the bottleneck of wind power generation development. And the low voltage ride through (LVRT) is the core technology of grid-connected wind power generation. At present the Crowbar protection circuit is mainly used to realize the LVRT capability of wind generator under large disturbances. And the quitting time of the Crowbar protection circuit has important effect on electric network fault restoration. According to the characteristics of large scale and long distance of China's wind power generation, in this paper, a dynamic model of doubly-fed induction generator (DFIG) which is connected with the IEEE9 nodes power system through the long distance transmission line has been established in DIgSILENT. The operational characteristics of DFIG under various short circuit fault conditions are simulated and analyzed. A Crowbar protection circuit quitting control method based on the reactive power judgment is presented, which can realize Crowbar protection circuit quitting immediately after fault clearance and can improve the LVRT capability of DFIG.关键词
风力发电/低电压穿越/双馈感应发电机/Crowbar保护电路/无功判定法Key words
wind power generation/low voltage ride through (LVRT)/doubly-fed induction generator (DFIG)/Crowbar protection circuit/reactive power judgment分类
信息技术与安全科学引用本文复制引用
李鸿儒,金炜东,胡立锦,赵炯,唐俊..基于无功判定法的Crowbar保护电路退出控制[J].电力系统保护与控制,2012,40(15):99-103,5.基金项目
国家自然科学基金(60971103) （60971103）
中央高校基本科研业务费专项资金 （）
