电力系统及其自动化学报2019，Vol.31Issue(4)：48-55,8.DOI:10.19635/j.cnki.csu-epsa.000046
计及输电线路分布电容的并网换流器谐振特性及抑制策略
Resonance Characteristics and Damping Strategy for Grid-connected Converter with Distributed Capacitance of Transmission Line
摘要
Abstract
With the increasing scale of new energy power generation systems,the larger distributed capacitance of trans?mission line due to long-distance power transmission cannot be ignored. Considering of the influence of distributed ca?pacitance to ground,the distributed parameter equivalent model of transmission line is established in this paper. On this basis,the resonant mechanism of a grid-connected system is studied in detail. In light of the multi-resonant peak phenomenon of the system due to the distributed parameters of transmission line,an active damping method with a high-order low-pass filter connected in series to the forward path is proposed to suppress the resonance without any extra sen?sor or system power loss. Finally,simulation results verify the effectiveness and stronger robustness of the proposed con?trol strategy.关键词
长输电线路/对地分布电容/谐波谐振/谐振抑制/高阶低通滤波器Key words
long transmission line/distributed capacitance to ground/harmonic resonance/resonant damping/high-order low-pass filter分类
信息技术与安全科学引用本文复制引用
相莹萍,韩肖清,王磊,刘颖,王金浩,李慧蓬..计及输电线路分布电容的并网换流器谐振特性及抑制策略[J].电力系统及其自动化学报,2019,31(4):48-55,8.基金项目
国家自然科学基金资助项目(51707103) （51707103）
湖北省教育厅优秀中青年科技创新团队咨询项目(T201504) （T201504）
