摘要
首先介绍了虚拟同步机(VSG)的基本原理,并对三相逆变器在电网电压不平衡下的数学模型进行分析,得出了VSG在电网电压不平衡下需要改进的问题。然后采用在正、负序同步旋转d,q坐标系下对正、负序分量独立控制的方法,使VSG在电网电压不平衡下分别实现抑制有功振荡、抑制无功振荡和三相输出电流均衡。最后,搭建了采用dSPACE控制的实验平台对所提方法的有效性进行了验证。
Firstly, the basic principles of virtual synchronous generator（VSG） are introduced and VSG’s problem that need improvement under unbalanced grid voltage are demonstrated by analyzing the model of three-phase inverter.Then, a control method of positive and negative sequence components respectively in the positive and negative sequence synchronous rotation d,q coordinate system is adopted to respectively realize active power oscillation suppression,reactive power oscillation suppression and balanced three-phase current under unbalanced grid voltage.At last,the experimental platform with dSPACE is built and the effectiveness of the proposed method is verified.
作者
张健夺
吴学智
唐芬
ZHANG Jian-duo;WU Xue-zhi;TANG Fen(National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China)
出处
《电力电子技术》
CSCD
北大核心
2018年第5期28-31,共4页
Power Electronics
基金
国家重点研发计划(2016YFB0900505)~~
关键词
虚拟同步机
电网电压不平衡
振荡
virtual synchronous generator
unbalanced grid voltage
oscillation
