双馈风力发电变流器谐波建模与特性分析  

Harmonic Modeling and Characteristic Analysis of Converters in Doubly Fed Wind Power Generation

作　　者：沈阳武 王世伟 张斌 刘佳润 SHEN Yangwu;WANG Shiwei;ZHANG Bin;LIU Jiarun(Electric Power Research Institute,State Grid Hunan Electric Power Co.,Ltd,Changsha 410007,China;College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]国网湖南省电力有限公司电力科学研究院,长沙410007 [2]湖南大学电气与信息工程学院,长沙410082

出　　处：《电力系统及其自动化学报》2020年第9期105-112,共8页Proceedings of the CSU-EPSA

摘　　要：双馈风力发电系统系统中包含电力电子变流器,变流器滤波电容、电感与变流器控制环节交互作用容易引起谐振造成严重谐波放大问题。本文根据双馈风力发电系统电网侧变流器和转子侧变流器控制特点,分别建立了电网侧变流器和转子侧变流器输出电流与谐波源之间的关系得到变流器谐波等效模型,研究分析了两个变流器谐波输出特性影响因素。研究分析结果表明,可以通过合理调节变流器控制参数抑制双馈发电系统谐波输出。采用PSCAD仿真模型验证了理论分析的正确性。The system of doubly fed wind power generation contains power electronic converters,in which the interactions among the converter filter’s capacitors and inductors and the converter’s control links may lead to harmonic resonances and further cause the issue of harmonic amplification.In this paper,according to the control features of gridand rotor-side converters of a doubly fed wind power generation system,the harmonic equivalent models of both converters are built based on the relations between the converter’s output current and harmonic sources,respectively,and the influencing factors for the output harmonic characteristics of these two converters are analyzed.The analysis result indicates that the system’s output harmonics can be suppressed by reasonably adjusting the control parameters of converters.Finally,the theoretical analysis is validated by a PSCAD simulation model.

关 键 词：谐波建模 谐波特性 变流器 新能源发电 双馈风机 

分 类 号：TM743[电气工程—电力系统及自动化]