基于DSOGI的不平衡负载补偿策略研究  

Research on compensation strategy of unbalanced load based on DSOGI

作　　者：黄倩 袁旭峰[1] 陈明洋 邵振 谈竹奎 徐玉韬 Huang Qian;Yuan Xufeng;Cheng Mingyang;Shao Zhen;Tan Zhukui;Xu Yutao(School of Electrical Engineering,Guizhou University,Guiyang 550025,China;Electric Power Research Institute of Guizhou Power Grid Company,Guiyang 550002,China)

机构地区：[1]贵州大学电气工程学院,贵阳550025 [2]贵州电网有限公司电力科学研究院,贵阳550002

出　　处：《电测与仪表》2021年第3期126-130,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51667007);中国南方电网有限责任公司重点科技项目(GZKJQQ00000417)。

摘　　要：为了补偿微电网孤岛运行中不平衡负载导致的三相不平衡电流,文章在分析了三相不平衡电流特性的基础上,提出了一种基于双二阶广义积分器(DSOGI)的不平衡电流补偿策略。分析了不平衡电流正负序分量的分离原理以及二阶广义积分(SOGI)的特性,提出基于DSOGI的基波正序电流检测方法;基于该方法提出补偿策略,对三相不对称电流进行补偿。在PSCAD/EMTDC中进行仿真验证,结果证明该补偿策略对三相负载不平衡具有较好的补偿效果。In order to compensate the three-phase unbalanced current caused by the unbalanced load in the operation of micro-grid islands,based on the analysis of the three-phase unbalanced current characteristics,an unbalanced current compensation strategy based on the double second-order generalized integrator(DSOGI)is proposed in this paper.Firstly,the separation principle of positive and negative sequence components of the unbalanced current is analyzed.The characteristics of second order generalized integral(SOGI)is studied as well.It brings about a fundamental wave positive sequence current detection method based on DSOGI.Secondly,based on this proposition,a compensation strategy provides the support for three-phase asymmetric current.Finally,simulation verification is carried out in PSCAD/EMTDC.The result shows that the compensation strategy has a good effect on the imbalance of the three-phase load.

关 键 词：不平衡负载 双二阶广义积分器 正序电流检测 补偿 PSCAD 

分 类 号：TM93[电气工程—电力电子与电力传动]