Treatment Strategy of Unbalanced Grid Voltage Conditions Based on MMC-UPFC Passive Sliding-mode Variable Structure Control

KE Shunchao; ZHU Miao; CHEN Yang; ZHENG Changbao; HU Cungang

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Treatment Strategy of Unbalanced Grid Voltage Conditions Based on MMC-UPFC Passive Sliding-mode Variable Structure Control

更新时间：2025-12-08

- Treatment Strategy of Unbalanced Grid Voltage Conditions Based on MMC-UPFC Passive Sliding-mode Variable Structure Control
- Vol. 46, Issue 3, Pages: 1078-1086(2020)
- 作者机构：
  
  1. 安徽大学教育部电能质量工程研究中心
  2. 上海交通大学电子信息与电气工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 March 2020，
  
  Published：2020
- 稿件说明：
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KE Shunchao, ZHU Miao, CHEN Yang, et al. Treatment Strategy of Unbalanced Grid Voltage Conditions Based on MMC-UPFC Passive Sliding-mode Variable Structure Control[J]. 2020, 46(3): 1078-1086.
DOI：

KE Shunchao, ZHU Miao, CHEN Yang, et al. Treatment Strategy of Unbalanced Grid Voltage Conditions Based on MMC-UPFC Passive Sliding-mode Variable Structure Control[J]. 2020, 46(3): 1078-1086. DOI：

摘要

电网三相不平衡是城市电网中的常见问题。基于模块化多电平换流器的统一潮流控制器（MMC-UPFC）是智能电网主动控制的重要工具。首先提出了一种MMC-UPFC的基于无源性滑模非线性控制策略。该策略首先基于无源性理论

利用阻尼注入方法

建立了基于MMC欧拉–拉格朗日模型的UPFC正、负序无源控制器

并将滑模变结构控制与无源控制相结合

解决了无源控制对系统参数精度要求高的问题

赋予整个系统响应速度快、对参数与外部变化不敏感的特点。其次利用MMC-UPFC串联侧换流器

补偿线路负序电压分量

进行电网三相不平衡治理。最后结合实际工程实例

构建了27电平MMC-UPFC仿真系统

详细验证了所提出的MMC-UPFC控制策略及其对电网三相不平衡治理的有效性。

Abstract

Three-phase unbalanced voltage condition is a common scenario in urban power grid. Modular multilevel converter based unified power flow controller（MMC-UPFC） plays an important role in smart grid active control. A passive sliding-mode control strategy of MMC-UPFC is proposed in this paper. Firstly

both positive-and negative-sequence passive controllers based on Euler-Lagrange（EL） model of MMC are established with a damping injection method according to the passive control theory. Since precise model parameters are required for a passive controller

sliding mode variable structure control is proposed. The control system has fast response and is not sensitive to parameter variation. The series converter of MMC-UPFC treats unbalanced grid voltage condition by compensating the negative sequence grid voltage. Finally

a simulation model of 27-level MMC-UPFC based on real project is constructed. The validity of proposed MMC-UPFC control strategy and its treatment of unbalanced grid voltage condition are verified by simulation results.

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