附加定子磁链的双馈风机次同步振荡抑制研究  

Research on Subsynchronous Oscillation Suppression of the Doubly-Fed Induction Generator with Additional Stator Flux Linkage

作　　者：马帅 王宁 韩国栋 刘继文 郭帅 刘浩[2] MA Shuai;WANG Ning;HAN Guodong;LIU Jiwen;GUO Shuai;LIU Hao(Laiwu Power Supply Company of State Grid Shandong Electric Power Company,Jinan 271100,Shandong,China;School of New Energy,China University of Petroleum,Qingdao 266580,Shandong,China)

机构地区：[1]国网山东省电力公司莱芜供电公司,山东济南271100 [2]中国石油大学(华东)新能源学院,山东青岛266580

出　　处：《电网与清洁能源》2022年第11期146-154,162,共10页Power System and Clean Energy

基　　金：国家自然科学基金项目(52177203);国网山东省电力公司科技项目资助(520612200002)。

摘　　要：针对双馈风电场经串联电容补偿系统所引发的次同步控制相互作用(SSCI)问题,该文从切断其振荡通路的角度提出一种附加定子磁链的抑制策略。该方法采用巴特沃斯和SOGI获取DFIG的定子和转子电流中的振荡分量,并运用准谐振控制器对获取的次同步定子磁链实现闭环控制,进而达到抑制SSCI的效果。最后,在MATLAB/SIMULINK上搭建了双馈风电场时域仿真模型并结合扫频法来验证附加定子磁链抑制策略的可行性。结果表明:在不同风速与串补度下,附加定子磁链抑制策略可提高系统正阻尼,避免了系统发生SSCI。Aiming at the subsynchronous control interaction(SSCI) problem caused by the series capacitor compensation system in doubly-fed wind farms,this paper proposes a strategy to suppress the additional stator flux linkage from the perspective of cutting off the oscillation path. The method uses Butterworth and SOGI to obtain the oscillating components in the stator and rotor currents of the DFIG,and uses a quasiresonant controller to achieve closed-loop control of the obtained subsynchronous stator flux linkage,thereby achieving the effect of suppressing SSCI. Finally, the time-domain simulation model of the doubly-fed wind farm is built on MATLAB/SIMULINK and combined with the frequency sweep method to verify the feasibility of the additional stator flux linkage suppression strategy. The results show that the additional stator flux linkage suppression strategy can improve the positive damping of the system under different wind speeds and series compensation degrees,and avoid the occurrence of SSCI in the system.

关 键 词：双馈风电场 串联补偿线路 次同步控制相互作用 附加定子磁链 准谐振控制器 

分 类 号：TM614[电气工程—电力系统及自动化]