Study on Microgrid Power Allocation Strategy Based on Virtual Impedance

WEI Chengwei; GONG Chongwei; DUAN Youlian; ZHENG Lianqing

doi:10.14044/j.1674-1757.pcrpc.2020.02.030

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Study on Microgrid Power Allocation Strategy Based on Virtual Impedance

更新时间：2024-09-14

- Study on Microgrid Power Allocation Strategy Based on Virtual Impedance
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 41, Issue 2, Pages: 169-174(2020)
- 作者机构：
  
  1. 新疆工程学院控制工程学院
  2. 国网四川省电力公司南充供电公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2020.02.030
  CLC： TM73
- Published：2020，
- 稿件说明：
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[1]魏成伟,龚崇伟,段友莲,郑连清.基于虚拟阻抗的微网功率分配策略研究[J].电力电容器与无功补偿,2020,41(02):169-174.

WEI CHENGWEI, GONG CHONGWEI, DUAN YOULIAN, et al. Study on Microgrid Power Allocation Strategy Based on Virtual Impedance. [J]. Power capacitor & reactive power compensation, 2020, 41(2): 169-174.
[1]魏成伟,龚崇伟,段友莲,郑连清.基于虚拟阻抗的微网功率分配策略研究[J].电力电容器与无功补偿,2020,41(02):169-174. DOI： 10.14044/j.1674-1757.pcrpc.2020.02.030.

WEI CHENGWEI, GONG CHONGWEI, DUAN YOULIAN, et al. Study on Microgrid Power Allocation Strategy Based on Virtual Impedance. [J]. Power capacitor & reactive power compensation, 2020, 41(2): 169-174. DOI： 10.14044/j.1674-1757.pcrpc.2020.02.030.

摘要

孤岛模式运行的微电网

其稳定性和可靠性要求各发电单元均衡分担负荷

电能质量要求系统电压和频率波动在一定范围内。采用传统下垂控制的微电网

电压和频率波动受负荷影响

电源输出特性与输电阻抗等因素有关

无法满足以上要求。本文分析了功率均衡分配条件

利用虚拟阻抗实现功率解耦和无功功率合理分配。针对虚拟阻抗以及下垂控制造成的母线电压降低

引入计算母线电压重新设计无功下垂方程

降低负荷变化和虚拟阻抗对母线电压的影响

保证其波动在规定范围内

提高了微网电能质量。

Abstract

The stability and reliability of microgrid working in island mode require each power generation unit to share the load equally and the power quality requires system voltage and frequency fluctuations within a certain range.The voltage and frequency fluctuation of microgrid with traditional droop control are affected by load

the output characteristic of source is related to such factors as transmission impedance and above requirement cannot be met.In this paper

the equal power distribution condition is analyzed

the virtual impedance is used to realize power decoupling and reasonable distribution of reactive power.Regarding bus voltage droop due to virtual impedance and droop control

an improved droop control method is proposed.The calculation bus voltage is introduced to redesign the reactive power droop equation so to reduce the influence of load variation and virtual impedance on the bus voltage

assure the fluctuation within the specified range and improve power quality of the microgrid.

关键词

下垂控制功率分配虚拟阻抗母线电压

Keywords

droop controlpower distributionvirtual impedancebus voltage

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