双馈风机与电网机电扭振互作用可能性分析  

Analysis on possibility of electromachenic torsional interaction between DFIG and power grid

作　　者：汤奕[1] 管永高 张磊[2] 吴熙[1] 吴英俊[3] 

机构地区：[1]东南大学电气工程学院,南京210096 [2]中国电力科学研究院新能源研究所,南京210003 [3]南京邮电大学自动化学院,南京210003

出　　处：《沈阳工业大学学报》2015年第1期16-21,共6页Journal of Shenyang University of Technology

基　　金："十二五"国家科技支撑计划项目(2011BAA01B02);中国电力科学研究院科技项目

摘　　要：为了研究大规模双馈式感应发电机风电场并网是否能引发双馈风电机组与交流电网间的机电扭振互作用问题,分析了双馈风电机组与交流电网间机电扭振互作用的机理,并基于双馈风电机组轴系特性对其与交流电网之间发生机电扭振互作用的可能性进行了探讨.分析得出由于交流输电系统串补度的限制,双馈风电机组与交流电网之间发生机电扭振互作用的条件较难满足,由此引发次同步谐振的可能性很小.通过时域仿真算例验证了结论的合理性.In order to study whether large-scale wind farm of doubly-fed induction generators( DFIG) can cause the electromachenic torsional interaction between the DFIG and AC power grid,the mechanism of electromachenic torsional interaction between DFIG and AC power grid was analyzed. Based on the shaft characteristics of DFIG,the possibility of electromachenic torsional interaction between DFIG and AC power grid was investigated. The results reveal that due to the limitation of series compensation degree of AC transmission system,the generation condition for the electromachenic torsional interaction between DFIG and AC power grid can hardly be satisfied,and thus,the generation possibility of sub-synchronous resonance is small. Finally,the rationality of conclusions is verified by the time domain simulation case analysis.

关 键 词：双馈式感应发电机 机电扭振互作用 次同步谐振 轴系特性 串补度 时域仿真分析 频谱分析 可能性评估 

分 类 号：TM31[电气工程—电机]