基于快速重复控制的级联DSTATCOM电流控制  

Fast repetitive control based current control strategy for a cascaded DSTATCOM

作　　者：王跃[1] 徐群伟[1] 胡耀威[1] 陈国柱[1] WANG Yue;XU Qunwei;HU Yaowei;CHEN Guozhu(College of Electrical Engineering,Zhejiang University,Hangzhou 310027)

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《磁性元件与电源》2020年第4期159-165,共7页Components and Power

基　　金：国家自然科学基金资助项目(#51177147);浙江省重点科技创新团队项目(#2010R50021)。

摘　　要：为提高配电网静止同步补偿器(DSTATCOM)的补偿能力、增强谐波抑制性能,引入改进型的快速重复控制(FREP),设计了基于比例积分(PI)控制内环和快速重复控制外环的电流双环控制策略。理论分析表明改进型的快速重复控制的固有延时仅为传统重复控制的六分之一,具有更快的动态响应速度。介绍了电流双环控制策略中控制器参数的设计方法,并进行了稳定性分析。最后,在MATLAB/Siraulink环境下建立三相三线制级联DSTATCOM仿真模型并搭建实验样机进行验证,仿真和实验结果证明了基于快速重复控制的电流双环控制策略能实现级联DSTATCOM对无功和谐波电流的高精度补偿。To improve the compensation ability and harmonic suppression performance of cascaded distribution static synchronous compensators(DSTATCOMs),fast repetitive control(FREP)was adopted for the design of double-loop control strategy consists of proportional integral(PI)inner loop and FREP outer loop.Theoretical analysis shows that the inherent delay of fast repetitive control is only one-sixth of traditional repetitive control,thus it owns a faster dynamic performance.The design method of control parameters in the dual-loop current control strategy as well as its stability analysis were presented in detail.Finally,Matlab/Simulink model of three-phase three-wire cascaded DSTATCOM was constructed with experiments carried out on DSTATCOM industrial prototype,simulation and experimental results show the proposed method can ensure high precise of reactive and harmonic current compensation.

关 键 词：级联DSTATCOM 谐波抑制 无功补偿 快速重复控制 稳定性分析 

分 类 号：TM7[电气工程—电力系统及自动化]