电网技术2016，Vol.40Issue(8)：2383-2388,6.DOI:10.13335/j.1000-3673.pst.2016.08.020
风机转子撬棒投切对电力系统暂态稳定性的影响
Impact of Rotor Crowbar Switching on Transient Stability of Power System
摘要
Abstract
Rotor crowbar is a commonly used tool for low voltage ride through (LVRT) for double fed induction generator (DFIG).During fault,crowbar switching will cause grid fluctuation,possibly influencing power system transient stability.Firstly,this paper presented impact of crowbar switching on mechanical power of equivalent system after integrating injected power from wind farm with mechanical power of the equivalent system.Based on extended equal area criterion,the paper theoretically analyzed influence mechanism of LVRT on power system transient stability.Accelerating energy was regarded as index to measure effect level of crowbar switching on transient stability.Simulation analysis was conducted.Research result showed that switching of rotor crowbar mainly affected power system acceleration process and the influence is related to grid-connection location of wind farm in a two machine system.Moreover,closer distance between wind farm and power sending end might contribute to transient stability for crowbar action.This study also provides a theoretical reference for LVRT optimization design.关键词
双馈风机/低电压穿越/撬棒/暂态稳定Key words
DFIG/LVRT/crowbar/transient stability分类
信息技术与安全科学引用本文复制引用
姜惠兰,姜哲,李天鹏,范中林,薛静玮..风机转子撬棒投切对电力系统暂态稳定性的影响[J].电网技术,2016,40(8):2383-2388,6.基金项目
国家自然科学基金项目(51477115).Project Supported by National Natural Science Foundation of China (51477115). （51477115）
