大功率微网逆变器输出阻抗解耦控制策略

LIU Fang

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大功率微网逆变器输出阻抗解耦控制策略

更新时间：2025-08-13

- 大功率微网逆变器输出阻抗解耦控制策略
- Automation of Electric Power Systems Vol. 39, Issue 15, Pages: 117-125(2015)
- 作者机构：
  
  合肥工业大学电气与自动化工程学院,安徽省,合肥市,230009
- 作者简介：
- 基金信息：
- DOI：
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- Published：2015
- 稿件说明：
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LIU Fang. [J]. Automation of electric power systems, 2015, 39(15): 117-125.
DOI：

LIU Fang. [J]. Automation of electric power systems, 2015, 39(15): 117-125. DOI：

摘要

针对微网逆变器孤岛并联时输出阻抗控制不能兼顾动态响应和并联均流的问题

提出了一种输出阻抗解耦控制策略。该控制策略根据dq坐标系中输出电压的戴维南等效模型

得到不同频段的阻抗特性

分离出动稳态输出阻抗

在dq坐标系中直接设计输出阻抗

用以动态响应和并联均流的解耦控制。在动态电压控制时

采用输出电流微分反馈控制和动态有源阻尼来减小动态输出阻抗;在均流控制时

增大稳态输出阻抗

从而获得了良好的动态响应和并联均流性能。实验结果验证了理论分析和控制方案的正确性。

Abstract

An output impedance decoupled control strategy for the microgrid inverter is proposed to solve the problem with the dynamic voltage response and load sharing. According to the Thevenin equivalent model of output voltage in the dq reference frame

impedance characteristics in different frequency ranges are obtained and dynamic and steady output impedances are then separated. Therefore they are designed directly in the dq reference frame for decoupled control of dynamic response and load sharing

respectively. In order to improve dynamic voltage response

output current derivative control and dynamic active damping are proposed to decrease dynamic output impedance. To improve load sharing

steady output impedance control is proposed to increase stable impedance. The effectiveness of the theoretical analysis and control strategy is verified by experimental results. This work is supported by National Key Technologies R&D Program (No. 2014BAA04B02).

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