Research on Reactive Power Compensation Control Strategy Based on Modular Multilevel Converter

JI Bin; WANG Liyong

doi:10.14044/j.1674-1757.pcrpc.2020.05.009

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Research on Reactive Power Compensation Control Strategy Based on Modular Multilevel Converter

更新时间：2024-09-14

- Research on Reactive Power Compensation Control Strategy Based on Modular Multilevel Converter
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 41, Issue 5, Pages: 46-53(2020)
- 作者机构：
  
  国网北京市电力公司发展策划部
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2020.05.009
  CLC： TM46;TM714.3
- Published：2020，
- 稿件说明：
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[1]纪斌,王立永.基于模块化多电平换流器的无功补偿控制策略研究[J].电力电容器与无功补偿,2020,41(05):46-53.

JI BIN, WANG LIYONG. Research on Reactive Power Compensation Control Strategy Based on Modular Multilevel Converter. [J]. Power capacitor & reactive power compensation, 2020, 41(5): 46-53.
[1]纪斌,王立永.基于模块化多电平换流器的无功补偿控制策略研究[J].电力电容器与无功补偿,2020,41(05):46-53. DOI： 10.14044/j.1674-1757.pcrpc.2020.05.009.

JI BIN, WANG LIYONG. Research on Reactive Power Compensation Control Strategy Based on Modular Multilevel Converter. [J]. Power capacitor & reactive power compensation, 2020, 41(5): 46-53. DOI： 10.14044/j.1674-1757.pcrpc.2020.05.009.

摘要

针对模块化多电平换流器在配电网无功补偿中的应用

文中研究了模块化多电平换流器的无功补偿控制策略

实现了电网的无功补偿和电压平衡控制。基于MMC的基本工作原理

建立了MMC的等效数学模型。提出电流内环和功率外环的无功补偿控制方法

以及电流内环有功与无功解耦控制方法

实现了故障情况下的正序和负序分量解耦控制。功率外环在传统定电压PI控制的基础上

增加了电压反馈调节控制器并提出k参数控制策略

进一步提高MMC的线性工作区。最后

利用Simulink仿真的方式对文中所提出的控制策略进行仿真分析。结果表明

在电网对称运行与不对称运行条件下

该策略均可实现对系统的无功补偿和电压稳定控制

且研究内容为实现模块化多电平换流器在电力系统无功补偿方面的应用提供了参考。

Abstract

As for the applic ation of compensation modular multi-level converter in the reactive power compensation of distribution network

in this paper the control strategy of reactive power compensationof modular multi-level converter is studied and the reactive power compensation and voltage balance control of power grid are achieved.On the basis of basic working principle of MMC

the equivalent mathematical model is set up.The reactive power compensation control strategy of current inner loop and power outer loop as well as active and reactive decoupling control method of current inner loop are proposed so to achieve the decoupling control of positive sequence and negative sequence components in case of fault.Based on the traditional constant voltage PI control

a voltage feedback controller is added to the power outer loo panel a k-parameter control strategy is proposed to further improve the linear working area of MMC.Finally

the control strategy proposed in this paper is simulated by Simulink.It is shown by the resultthat the control strategy

in case of symmetric and asymmetric operation mode of power network

can achieve reactive compensation and voltage stability control of the system.Moreover

the content of the study this paper provides reference for the application of modular multilevel converter in reactive power compensation of power system.

关键词

模块化多电平换流器（MMC）无功补偿解耦控制反馈调节电压稳定定电压控制

Keywords

modular multilevel converter（MMC）reactive power compensationdecoupling controlfeedback regulationvoltage stabilityconstant voltage control

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