基于自适应负序电流虚拟阻抗的微电网不平衡控制策略

MA Tianyi

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基于自适应负序电流虚拟阻抗的微电网不平衡控制策略

更新时间：2025-08-13

- 基于自适应负序电流虚拟阻抗的微电网不平衡控制策略
- Automation of Electric Power Systems Vol. 38, Issue 12, Pages: 12-18(2014)
- 作者机构：
  
  北京交通大学电气工程学院,北京市,100044
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2014
- 稿件说明：
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MA Tianyi. [J]. Automation of electric power systems, 2014, 38(12): 12-18.
DOI：

MA Tianyi. [J]. Automation of electric power systems, 2014, 38(12): 12-18. DOI：

摘要

微电网中单相负荷的存在导致负序电流和电压的产生

对微电网系统的稳定性产生了影响。线路参数的差异影响了微电源的负序电流分配能力

降低了微电源的可靠性

而负序电压比例的增大会降低微电网系统的电能质量。提出一种可提高微电网负荷不平衡工况下供电质量和稳定性的综合控制策略

在微电源控制中增加了自适应的负序虚拟阻抗

采用负序电流幅值调节负序虚拟阻抗值

通过自适应负序虚拟阻抗设计

可实现孤岛模式负荷不平衡工况下多微电源负序电流的精确分配。分析了自适应负序虚拟阻抗特性变化对公共耦合点(PCC)电压不平衡度的影响

为降低PCC电压的不平衡度

给出了一种提高负荷节点电压电能质量的二次控制方法。实验结果验证了控制策略的正确性和有效性。

Abstract

The single phase load in a microgrid brings about negative sequence voltage and current

influencing the stability of the microgrid. The parameter difference of micro-source influences negative current distribution and reduces the reliability of the micro-source. The negative sequence voltage increase will reduce the power quality of the microgrid. To solve the above problems

a comprehensive control strategy is proposed under the unbalanced load condition. The self-adaption negative sequence virtual impedance is added to the micro-source

which is regulated by its negative current amplitude. Through the design of self-adaption negative sequence virtual impedance

accurate negative current distribution is realized under the island mode. The impact of negative sequence virtual impedance characteristic change on the point of common coupling （PCC） node voltage unbalance factor is analyzed. In order to reduce the PCC voltage unbalance factor

a kind of secondary voltage compensation method is proposed. The correctness and effectiveness of the control strategy are demonstrated by experiment results.

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