计及RSC控制的DFIG短路电流直流分量解析表达  

ANALYTICAL EXPRESSION OF DC COMPONENT OF SHORT-CIRCUIT CURRENTS OF DFIG CONSIDERING RSC CONTROL

作　　者：李生虎[1] 王鹏飞[1] 孙琪[1] 吴东 黄杰杰[1] Li Shenghu;Wang Pengfei;Sun Qi;Wu Dong;Huang Jiejie(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;Maintenance Department,Tianjin Electric Power Company,Tianjin 300232,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]天津电力公司检修公司,天津300232

出　　处：《太阳能学报》2020年第2期131-136,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51277049,51637004)。

摘　　要：现有文献针对计及转子变流器(RSC)控制的双馈感应风电机组(DFIG)定子短路电流解析表达,将定子磁链当作一阶直流衰减分量或忽略功率外环控制。基于DFIG电压、磁链和RSC控制方程,得到定子电流关于定子电压和定子功率的传递函数,提出定子电流的精确解析表达式。基于RSC内、外环PI参数关系,推导直流分量衰减时间常数和角频率关于PI参数的表达式。分析了RSC内外环PI参数对定子电流直流衰减分量的影响。仿真结果验证了解析表达式的准确性,为PI参数选取和保护装置测量、整定提供依据。In existing literatures,the analytical expressions of the stator short circuit currents of the doubly fed induction generator(DFIG)considering the rotor side converter(RSC)control are derived either by assuming that the stator flux as the first order decaying DC component or by neglecting the outer-loop power control. Based on the voltage,flux-linkage equations of the DFIG and the RSC control equations,the stator current transfer functions concerning the stator power reference value and stator voltage is obtained,and then the accurate analytical expressions of the stator currents are derived. Based on the relationship between the PI parameters of the inner and outer loop control of the RSC,the decaying time constant and angular frequency of the decaying DC component analytical expressions about the proportional parameters are derived. The effects of the PI parameters of the inner and outer loop control to the RSC on the decaying DC components of the stator currents are analyzed. Simulations results verify the accuracy of the analytical expressions.

关 键 词：风电 短路电流 传递函数 直流衰减分量 转子变流器 PI参数 解析表达 

分 类 号：TM614[电气工程—电力系统及自动化] TM713