电网电压骤升时DFIG定子磁链暂态全过程及其影响因素研究  

Study on transient whole process and influencing factors stator flux in grid voltage swell of DFIG

作　　者：孙丽玲[1] 尹思杰 王艳娟 Sun Liling;Yin Sijie;Wang Yanjuan(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,Hebei,China;State Grid Jibei Electric Power Co.,Ltd.,Tangshan 063299,Hebei,China)

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003 [2]国网冀北电力有限公司,河北唐山063299

出　　处：《电测与仪表》2022年第8期86-91,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51277077)。

摘　　要：双馈感应发电机(DFIG)的高电压穿越问题中,定子磁链的暂态特性研究是实现高电压穿越运行的基础和依据,而常规研究大多只针对电网电压单一骤升模式进行分析,且未考虑故障恢复后定子磁链的动态过程,使其暂态特性分析不全面。文中对电压不同骤升模式时的定子磁链瞬态过程进行了研究,对比分析了影响定子磁链暂态特性的一些因素。电网电压的上升模式不同,定子磁链的暂态特性也不一样,且模式Ⅰ的暂态衰减分量远大于模式Ⅱ;相邻两次电压上升数值相同且时间间隔为Δt=(n+0.5)T_(s)时,能够最小化定子磁链的瞬态衰减分量。仿真结果证明了理论分析的正确性,文中的研究内容对掌握DFIG的动态过程和高电压穿越控制策略的制定具有一定的参考价值。In the high voltage ride through problem of doubly fed induction generator(DFIG),the study of transient characteristics of stator flux is the basis for realizing high voltage ride through operation.However,the conventional studies only focus on single mode analysis of grid voltage swell,and ignore the fault dynamic change of stator flux recovery after the fault recovery,so that the transient characteristic analysis is not comprehensive.In this paper,the whole process of stator flux transient in different surge modes of grid voltage is studied.On this basis,the factors influencing the transient characteristics of stator flux are compared and analyzed.Grid voltage surge mode is different,the stator flux transient characteristics are also different,and the transient attenuation component of mode Ⅱ is much smaller than mode Ⅰ.When the voltage rise of the adjacent grid is the same and the time interval is Δt=(n+0.5)T_(s),the transient attenuation component of the stator flux can be minimized.The simulation results verify the correctness of the theoretical analysis.The research of this paper has certain reference value to master the dynamic process of DFIG and the formulation of high voltage ride through control strategy.

关 键 词：双馈感应发电机 高电压穿越 暂态特性 骤升模式 时间间隔 

分 类 号：TM614[电气工程—电力系统及自动化]