基于附加带阻滤波器的模块化多电平换流器高频谐振抑制策略  

Suppression Strategy for High Frequency Resonance of Modular Multilevel Converter Based on Additional Band-Stop Filter

作　　者：杜东冶 郭春义 贾秀芳 赵成勇 胡应宏 Du Dongye;Guo Chunyi;Jia Xiufang;Zhao Chengyong;Hu Yinghong(State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University,Beijing,102206,China;Electric Power Research Institute of State Grid JIBEI Electric Power Co.Ltd,Beijing,100045,China;North China Electric Power Research Institute Co.Ltd,Beijing,100045,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206 [2]国网冀北电力有限公司电力科学研究院,北京100045 [3]华北电力科学研究院有限责任公司,北京100045

出　　处：《电工技术学报》2021年第7期1516-1525,共10页Transactions of China Electrotechnical Society

基　　金：国家电网有限公司总部科技资助项目(5500-202014057A-0-0-00《柔直电网模块化电压源换流阀高次谐波机理与抑制措施》)。

摘　　要：模块化多电平换流器控制系统的链路延时有可能引发高频谐振现象。该文建立了包含链路延时环节在内的模块化多电平换流器高频阻抗数学模型,根据阻抗分析法研究模块化多电平换流器高频谐振的产生机理。在此基础上,提出在电压前馈环节附加带阻滤波器的高频谐振抑制策略,设计带阻滤波器的控制参数,最后通过电磁暂态仿真验证了所提控制策略的有效性。Modular multilevel converter control system link delay may cause high frequency resonance phenomenon.This paper establishes a mathematical model of high-frequency impedance for a modular multilevel converter including a link delay link,and studies the generation mechanism of high-frequency resonance of a modular multilevel converter based on impedance analysis.On this basis,a high-frequency resonance suppression strategy with a band-stop filter in the voltage feed-forward stage is proposed,and the control parameters of the band-stop filter are designed.Finally,the effectiveness of the proposed control strategy is verified by electromagnetic transient simulation.

关 键 词：模块化多电平换流器 高频谐振 控制延时 带阻滤波器 

分 类 号：TM721.1[电气工程—电力系统及自动化]