电力系统及其自动化学报2018，Vol.30Issue(2)：71-78,8.DOI:10.19635/j.cnki.csu-epsa.000005
基于线性自抗扰控制的MMC环流抑制策略
Circulating Current Suppressing Strategy for Modular Multilevel Converter Based on Linear Active Disturbance Rejection Control
张芳 1张光耀 1陈堃2
作者信息
- 1. 天津大学电气自动化与信息工程学院,天津300072
- 2. 国网湖北省电力公司电力科学研究院,武汉430077
- 折叠
摘要
Abstract
The technology of high voltage direct current based on modular multilevel converter(MMC-HVDC)has been widely used around the world.However,the working performance of MMC is affected by the existence of arm circulating current,which becomes a key factor that restricts its development.In this paper,a new circulating current suppressing strategy for MMC is proposed. Firstly,a filter based on a second-order generalized integrator is designed,which can quickly and accurately extract the second-order harmonic components of arm circulating current.Secondly,a circulat?ing current suppressing controller(CCSC)based on linear active disturbance rejection control is designed to suppress the extracted second-order harmonic components. Compared with the CCSC based on PI control,the designed CCSC does not depend on the exact mathematical model of circulating current;meanwhile,it also solves the problems of too many design parameters associated with the CCSC based on active disturbance rejection control as well as difficult tun?ing.Finally,an electromagnetic transient simulation model of 21-level MMC-HVDC is built in PSCAD/EMTDC.Simula?tion results verify the effectiveness of the designed CCSC.关键词
柔性直流输电/模块化多电平换流器/环流抑制/二阶广义积分器/线性自抗扰控制器Key words
flexible DC transmission/modular multilevel converter/circulating current suppression/second-order generalized integrator/linear active disturbance rejection controller分类
信息技术与安全科学引用本文复制引用
张芳,张光耀,陈堃..基于线性自抗扰控制的MMC环流抑制策略[J].电力系统及其自动化学报,2018,30(2):71-78,8.
