中国电机工程学报2017，Vol.37Issue(22)：6481-6491,11.DOI:10.13334/j.0258-8013.pcsee.171423
开环模式谐振引发含变速风电机组电力系统振荡的机理分析
Oscillations Caused by Open-loop Modal Resonance in Power System With Variable-speed Wind Generator
摘要
Abstract
A closed-loop interconnected model of a power system with variable speed wind generator was established to investigate the impact of dynamic interactions between converter control loops on system stability,wherein,the system was decomposed into two separate but interconnected openloop subsystems.Based on the established model,oscillations mechanism was revealed from the perspective of open-loop modal resonance (OLMR).Under the condition of OLMR,i.e.,two open-loop subsystem modes are close to each other on the complex plane,strong dynamic interactions between converter control loops are caused which will make the coupled modes repulse each other to move towards opposite directions.It is very likely that OLMR may lead one of the resonant modes to move along the imaginary axis,and degrade the system damping.An estimation method is proposed in this paper to predict the distribution positions of closed-loop resonant modes on the complex plane under the condition of OLMR,and thus estimate the damping degradation.In addition,the effects of the connection strength,operation points on OLMR are also analyzed.Finally,study cases of example power system with the permanent magnet synchronous generator (PMSG) or double fed induction generator (DFIG) are presented to demonstrate and evaluate the analysis and conclusions made.关键词
变速风电机组/开环模式谐振/动态交互/直驱型风电机组/双馈型风电机组Key words
variable-speed wind generator/open-loop modal resonance (OLMR)/dynamic interaction/permanent magnet synchronous generator (PMSG)/double fed induction generator (DFIG)分类
信息技术与安全科学引用本文复制引用
王旭斌,杜文娟,王海风..开环模式谐振引发含变速风电机组电力系统振荡的机理分析[J].中国电机工程学报,2017,37(22):6481-6491,11.基金项目
国家重点研发计划项目(2016YFB0900602).Project Supported by the National Key Research and Development Program of China (2016YFB0900602). （2016YFB0900602）
