微电网逆变器电流下垂控制分析与实验研究

顾和荣; 赵巍; 王雷; 张莹; 郭小强

引用本文:	顾和荣,赵巍,王雷,等.微电网逆变器电流下垂控制分析与实验研究[J].电力系统保护与控制,2013,41(18):45-48.
	GU He-rong,ZHAO Wei,WANG Lei,et al.Analysis and experimental verification of current droop control for microgrid inverters[J].Power System Protection and Control,2013,41(18):45-48

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微电网逆变器电流下垂控制分析与实验研究
顾和荣¹, 赵巍¹, 王雷¹, 张莹¹, 郭小强¹
燕山大学电力电子节能与传动控制河北省重点实验室，燕山大学电气工程学院，河北秦皇岛 066004

摘要:

电流均分是微电网逆变器并联运行的关键问题之一。提出一种零输出阻抗电流下垂控制方法。和传统下垂控制采用功率变量不同，该方法采用电流为下垂控制变量，无需有功功率和无功功率计算。采用比例谐振闭环控制确保逆变器输出阻抗为零，消除了输出阻抗对电流均分的影响。理论分析、仿真和实验结果验证了所提出方法的有效性。

关键词: 微电网逆变器下垂控制电流均分

DOI：10.7667/j.issn.1674-3415.2013.18.007

分类号:

基金项目:国家自然科学基金项目资助（50977081）；河北省自然科学基金项目(E2012203023)；秦皇岛市科学技术研究与发展计划（2012021A037，201001A086)

Analysis and experimental verification of current droop control for microgrid inverters

GU He-rong,ZHAO Wei,WANG Lei,et al

Abstract:

Current sharing is one of the key issues for parallel operation of the autonomous inverter-dominated microgrid. A new method of current droop control with zero output impedance is presented. Different from the conventional power droop control, the proposed solution uses the current as the droop control variable, and thus there is no need of the instantaneous power calculation. Also, the closed-loop PR control is designed to ensure the zero output impedance of inverter, which mitigates the effect of inverter output impedance on current sharing. Theoretical analysis, simulation and experimental results verify the effectiveness of the proposed method.

Key words: microgrid inverter droop control current sharing

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