中国电机工程学报2015，Vol.35Issue(19)：4861-4869,后插25,10.DOI:10.13334/j.0258-8013.pcsee.2015.19.003
基于定转子转矩分析法的双馈风机次同步谐振机理研究
Mechanism Study of DFIG-related SSR Based on Separate Stator and Rotor Torque Analysis
摘要
Abstract
Starting from the expression of electromagnetic torque of doubly fed induction generator (DFIG), this paper divided the electromagnetic torque variation at a certain rotor speed variation into two parts, i.e., the rotor torque variation and stator torque variation. After working out the relationship of stator and rotor torque variations with the rotor speed variation, a novel mechanism interpretation of subsynchronous resonance (SSR) was put forward by analyzing the amplitude and phase characteristics versus frequency. With this method, this paper investigated the impact of rotor speed, compensation level and controller parameter on SSR stability. Results show that rotor-side electromagnetic torque variation has a positive damping effect on SSR but the stator-side torque variation has a negative damping effect. The speed of rotor and the inner-loop gain of rotor side converter (RSC) mainly affect rotor-side torque variation and the compensation level has significant impact on the stator-side torque variation. SSR risk will increase with lower rotor speed, higher compensation level or larger controller gain.关键词
双馈风机/次同步谐振/机理解释/定转子转矩分析/主导因素Key words
doubly fed induction generator (DFIG)/subsynchronous resonance (SSR)/mechanism study/stator and rotor torque analysis/dominant factors分类
信息技术与安全科学引用本文复制引用
董晓亮,谢小荣,韩英铎,李江..基于定转子转矩分析法的双馈风机次同步谐振机理研究[J].中国电机工程学报,2015,35(19):4861-4869,后插25,10.基金项目
国家自然科学基金项目(51322701). Project Supported by National Natural Science Foundation of China (51322701). （51322701）
