基于谐波电流前馈的虚拟同步机控制方法  

A Method for Virtual Synchronous Machine Based on Feedforward of Harmonic Current

作　　者：张卫国 孙广明[1,2] 陈良亮 潘爱强[4] ZHANG Wei-guo;SUN Guang-ming;CHEN Liang-liang;PAN Ai-qiang(NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China)

机构地区：[1]南瑞集团(国网电力科学研究院)有限公司,江苏南京211106 [2]国电南瑞科技股份有限公司,江苏南京211106 [3]国电南瑞南京控制系统有限公司,江苏南京211106 [4]国网上海市电力公司,上海200122

出　　处：《电力电子技术》2021年第4期39-42,共4页Power Electronics

基　　金：国家电网有限公司科技项目(SGSHDK00KJJS1900379)。

摘　　要：此处提出一种基于谐波电流前馈的负荷侧虚拟同步机(VSM)电流谐波抑制方法。首先研究了电压控制型VSM的数学模型和控制方法,随后针对电压控制型VSM对电流进行间接控制导致网侧电流质量较差的缺点,提出了一种提取三相电流谐波信息前馈至调制波改善电流质量的方法。通过二阶广义积分器(SOGI)算法提取谐波电流,将提取的谐波电流通过比例微分(PD)调节器前馈至调制波,以达到有效降低VSM交流侧电流谐波的目的。最后通过仿真和实验,证实了所提控制方法的有效性。A harmonic current suppression method based on feedforward of harmonic current for load virtual syn·chronous machine(VSM)is studied.Firstly,the mathematical model is investigated and control method of voltage controlled VSM.Secondly,to solve the problem of poor current quality caused by indirect current control of voltage controlled VSM,a method to improve the current quality by extracting the harmonic current is proposed.The harmonic current is extracted by second order generalized integration(SOGI)algorithm,then the harmonic current is inject to modulation wave by proportion differential(PD)regulator in order to effectively reduce the current harmonics of VSM AC side.Finally,the proposed control method is verified by simulation and experimental results.

关 键 词：虚拟同步机 二阶广义积分器 谐波电流前馈 

分 类 号：TN948.42[电子电信—信号与信息处理]