电网故障下的电能路由器直流电容电压平衡控制策略

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电网故障下的电能路由器直流电容电压平衡控制策略

更新时间：2025-08-13

- 电网故障下的电能路由器直流电容电压平衡控制策略
- Automation of Electric Power Systems Vol. 42, Issue 2, Pages: 20-25(2018)
- 作者机构：
  
  智能电网教育部重点实验室(天津大学),天津市,300072
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2018
- 稿件说明：
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XIAO Qian. [J]. Automation of electric power systems, 2018, 42(2): 20-25.
DOI：

XIAO Qian. [J]. Automation of electric power systems, 2018, 42(2): 20-25. DOI：

摘要

针对传统方法无法实现电网故障下的电能路由器直流电容电压平衡问题，文中提出了三层结构的直流电容电压平衡控制策略。在对不平衡的功率进行理论分析的基础上，通过动态调整定义的加权系数，来灵活控制注入的零序电压和负序电流各自承担的相间移动功率，提高系统控制自由度。在MATLAB/Simulink环境下搭建电能路由器仿真平台，仿真结果表明:当某一相电网故障(电网电压跌落95%)时，采用单一的零序电压、零序电压和负序电流加权组合、单一的负序电流的注入均可实现电能路由器直流电容电压平衡控制目标。

Abstract

A three-layer voltage balancing control strategy for DC capacitor is proposed to solve the DC capacitor voltage unbalance problem of electrical energy router under power grid failure. Based on the theoretical analysis of the unbalance power

the injection of zero-sequence voltage and negative-sequence current can flexibly share the responsibility of inter-phase unbalance power by dynamically adjusting the defined weighting coefficient

which improves the control freedom of the system. The simulation platform of electrical energy router is established in MATLAB/Simulink. The simulation results show that

when a single-phase failure(95% grid-voltage sag)occurs

the voltage balancing control goal of DC capacitor in electrical energy router can be achieved by independently using the injections of the single zero-sequence voltage

the weighted integration of zero-sequence voltage and negative-sequence current

or the single negative-sequence current.

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