基于下垂控制的微网并网主动同步控制策略
摘要:为了加强微网与电网并网的可靠性，实现孤网切换至并网运行的平滑性，以对等控制体系下的微网为背景，针对微网与电网同步问题，提出了基于下垂控制的主动同步控制策略。该方法在传统下垂控制上增加了功率给定，实现了微网的有功与无功功率、电压与频率间独立解耦，通过三相锁相环(sampled phase-locked loop，SPLL)输出电网电压幅值和相位，实现了电网电压同步；通过下垂控制输出积分，得到微网接口逆变器电压相位，再利用比例积分(proportional integral，PI)调节器进行无差控制，从而实现微网并网运行前的幅值、频率和相位主动同步。最后在Matlab/Simulink环境下进行了仿真，仿真结果表明了该控制策略的有效性和可行性。
Abstract：To ensure the stability of the micro-grid with large-grid interconnection and realize isolated-net smooth switching to the grid, this paper proposes active synchronization control strategy based on droop control under the background of microgrid in peer-to-peer control system, according to the problem of the network synchronization with the grid. In this method, the power is given on the traditional droop control, and the active and reactive power of the microgrid and the decoupling between the voltage and the frequency are realized, the output voltage amplitude and phase are obtained by three-phase phase-locked loop (SPLL), which realizes the voltage synchronization of grid. The voltage phase of inverter at micro-grid interface can be obtained through the output integral by droop control, and then the PI controller is used for isochronous control, which can realize the synchronization of the amplitude, frequency and phase of the microgrid before the grid connected operation. Finally, the simulation is carried out in the Matlab/Simulink environment, whose result verifies the effectiveness and feasibility of the control strategy.
标题：基于下垂控制的微网并网主动同步控制策略
title:Active Synchronization Control Strategy for Microgrid Based on Droop Control
作者：丁晓薇,匡洪海,郑丽平,汪宝,李圣清
authors:DING Xiaowei,KUANG Honghai,ZHENG Liping,WANG Bao,LI Shengqing
关键词：微网,下垂控制,主动同步,逆变器,
keywords:micro-grid,droop control,active-sync,inverter,
发表日期：2017-08-31
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