分布式电源并网惯性功率补偿研究  

Analysis and application of inertia power compensating of grid-connected distributed generation

作　　者：沈诞煜 赵晋斌 李吉祥 屈克庆 李芬 宇敷修一 SHEN Danyu;ZHAO Jinbin;LI Jixiang;QU Keqing;LI Fen;USHIKI Shuichi(College of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Origin Electric Co.,Ltd.,Sai Yu City 330-6013,Japan)

机构地区：[1]上海电力大学电气工程学院,上海200090 [2]日本欧利生电气公司,琦玉市330-6013

出　　处：《电力系统保护与控制》2019年第16期50-57,共8页Power System Protection and Control

基　　金：国家自然科学基金项目资助(51777120)~~

摘　　要：虚拟同步电机(Virtual Synchronous Generator,VSG)通过引入转动惯量提高系统频率稳定,但相较于分布式电源(Distributed Generation,DG)传统并网模式,其控制算法复杂,设备成本高,惯量设置分散。针对如何在不改变现有DG传统并网系统的前提下,更简单经济地增加系统的转动惯量展开研究。首先,分析虚拟同步电机暂态响应过程,经过功率解耦分解出转子惯性功率。然后,基于转子惯性功率响应特性和超级电容的运行特性,借鉴静止无功补偿器(Static Var Compensator,SVC),提出静止惯性补偿器(Static Inertia Compensator,SIC)的概念。最后,在Matlab/Simulink中搭建仿真模型,验证所提想法的有效性。结果表明,SIC通过检测频率变化情况向节点提供惯性功率,可以提高系统转动惯量从而增强系统频率稳定,能够达到虚拟同步电机稳定频率的效果。The Virtual Synchronous Generator(VSG)improves the frequency stability by introducing the inertia,but it is complex and costly compared to the traditional grid connected mode of Distributed Generation(DG).Its inertia setting is also dispersed.So this paper studies how to increase the virtual inertia in the distributed generation grid connected system more easily and economically.Firstly,this paper analyzes the transient response process of VSG and decomposes the rotor inertia power through the power decoupling.Secondly,based on the characteristics of the rotor inertia power response and the running characteristics of the super capacitor,referring to Static Var Compensator(SVC),the concept of Static Inertia Compensator(SIC)is proposed.Lastly,the simulation model of the static inertia compensator is built in Matlab/Simulink to verify the effectiveness of the proposed idea.The results show that SIC can provide inertia power to the node by detecting the frequency variation.It can improve the inertia of the system and enhance the frequency stability of the system and achieve the effect of frequency stabilization of VSG.

关 键 词：分布式电源 转动惯量 功率解耦 静止惯性补偿器 频率稳定性 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]