现代电力2018，Vol.35Issue(1)：89-94,6.
基于比例降阶准谐振的MMC环流抑制策略
MMC Circulating Current Suppression Strategy Based on Proportional Reduced Order Quasi-resonant
摘要
Abstract
There is large value of second-order harmonic cur-rent that flows through the three phase arm of modular mul-tilevel converter,namely circulating current,which not only influences the stability of the converter,but also increases the losses of HVDC system.In order to suppress the circu-lating current,a proportional reduced order resonant con-troller is proposed in this paper.Firstly,the negative double line frequency in circulating current is detected and extrac-ted by the second-order generalized integrator,after which the three-phase circulating current is transformed to DC component by reference frame transform of three-phase to two-phase coordinates.Subsequently,the proportional re-duced order resonant controller is applied to achieve precise tracking of circulating current,and the correction of refer-ence voltage is obtained.This controller can accurately and rapidly extract the negative sequence two octave component and is simple to implement.关键词
模块化多电平换流器/二倍频环流/二阶广义积分器/比例降阶准谐振Key words
modular multilevel converter/double-frequency circulating current/second-order generalized integrator/proportional reduced order quasi-resonant分类
信息技术与安全科学引用本文复制引用
刘永强,江伟,王渝红,陈金祥,黄道姗,龚鸿,王柯岩..基于比例降阶准谐振的MMC环流抑制策略[J].现代电力,2018,35(1):89-94,6.基金项目
国家电网公司科技项目(52130415000M) （52130415000M）
