微电网模式切换的转动惯量自适应VSG控制策略
摘要:虚拟同步发电机(virtual synchronous generator，VSG)控制可改善逆变器输出特性，但恒定转动惯量的VSG无法兼顾微电网不同模式下功率及频率动态调节性能。针对微电网不同运行模式下传统VSG控制动态性能差的问题，提出一种转动惯量自适应控制策略。首先介绍VSG工作原理，并建立数学模型，分析转动惯量及阻尼系数对VSG输出特性的影响；然后将微电网运行模式状态引入VSG转动惯量控制中，形成转动惯量自适应控制，并给出转动惯量等参数的整定原则；最后在Matlab/Simulink上对比了恒定转动惯量与自适应转动惯量VSG控制方法在微电网模式切换运行中的频率和功率响应曲线，结果表明所提出的控制策略能应对微电网不同的运行模式，避免出现功率震荡，优化了输出响应曲线。
Abstract：Virtual synchronous generator (VSG) control can improve the inverter output characteristics, but the VSG with constant moment of inertia cannot balance the power and frequency dynamic adjustment performance of microgrid in different modes. Aiming at the problem of poor dynamic performance of traditional VSG control under different operating modes of microgrid, an adaptive control strategy of moment of inertia is proposed. Firstly, this paper introduces the working principle of VSG and establishes a mathematical model to analyze the influences of moment of inertia and damping coefficient on the output characteristics of VSG. Then, the state of the micro-grid operation mode is introduced into the VSG moment of inertia control to form the inertia adaptive control and give the setting principle of the moment of inertia and other parameters. Finally, the frequency and power response curves of constant moment of inertia and adaptive moment of inertia VSG control method in microgrid mode switching operation are compared on Matlab/Simulink. The results show that the proposed control strategy can respond to different operating modes of the microgrid, avoid power oscillations, and optimize the output response curve.
标题：微电网模式切换的转动惯量自适应VSG控制策略
title:Moment of Inertia Adaptive VSG Control Strategy for Microgrid Mode Switching
作者：李娟,金焕,任于涵
authors:LI Juan,JIN Huan,REN Yuhan
关键词：微电网,虚拟同步发电机(VSG),模式切换,转动惯量自适应,输出响应,
keywords:micro-grid,virtual synchronous generator (VSG),mode switching,adaptive of inertia,output response,
发表日期：2019-10-11
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