Passivity-Consensus Based Control Method for Modular Multilevel Converter in Unbalanced Power Grid

Hua XUE; Guangping TIAN; Zenghui HU; Yufei WANG; Xingwu YANG

doi:10.7500/AEPS20210430006

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Passivity-Consensus Based Control Method for Modular Multilevel Converter in Unbalanced Power Grid

Basic Research | 更新时间：2025-06-16

- Passivity-Consensus Based Control Method for Modular Multilevel Converter in Unbalanced Power Grid
- Automation of Electric Power Systems Vol. 46, Issue 3, Pages: 85-95(2022)
- 作者机构：
  
  1.上海电力大学电气工程学院，上海市 200090
  2.国网山东省电力公司肥城市供电公司，山东省肥城市 271000
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(51007053);Shanghai Science and Technology Innovation Action Plan(19DZ2204700)
- DOI：10.7500/AEPS20210430006
  CLC：
- Received：30 April 2021，
  
  Revised：2021-09-05，
  
  Published Online：16 December 2021，
  
  Published：10 February 2022
- 稿件说明：
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薛花,田广平,扈曾辉等.电网不平衡下模块化多电平变换器无源一致性控制方法[J].电力系统自动化,2022,46(3):85-95.

XUE Hua,TIAN Guangping,HU Zenghui,et al.Passivity-Consensus Based Control Method for Modular Multilevel Converter in Unbalanced Power Grid[J].Automation of Electric Power Systems,2022,46(3):85-95.
薛花,田广平,扈曾辉等.电网不平衡下模块化多电平变换器无源一致性控制方法[J].电力系统自动化,2022,46(3):85-95. DOI： 10.7500/AEPS20210430006.

XUE Hua,TIAN Guangping,HU Zenghui,et al.Passivity-Consensus Based Control Method for Modular Multilevel Converter in Unbalanced Power Grid[J].Automation of Electric Power Systems,2022,46(3):85-95. DOI： 10.7500/AEPS20210430006.

摘要

针对采用传统矢量控制的模块化多电平变换器(MMC)在电网发生单相短路时易发生系统运行失稳的问题，从能量角度出发，提出形式简单、稳定性较好的无源一致性控制方法。以电网不平衡情形下正序电流期望轨迹快速跟踪与负序电流快速抑制为第1目标，通过建立MMC端口受控耗散哈密顿模型，求取不影响全局能量耗散的“无功力”，简化无源性控制器设计，实现全局能量在期望平衡点处达到最小，闭环控制系统全局渐近稳定。以提升正、负序

轴电流期望轨迹跟踪的同步性为第2目标，将当前相与相邻相的并网电流期望轨迹跟踪误差作为状态误差引入无源性控制律，提出无源一致性控制方法，实现正、负序

轴电流期望轨迹跟踪的同步达成。基于MATLAB/Simulink的仿真结果表明：所提方法在系统单相短路故障分别与直流侧电压阶跃变化、有功功率波动、MMC参数摄动同时发生时具有良好动静态性能、宽稳定域和强鲁棒性。

Abstract

Aiming at the problem that the modular multilevel converter (MMC) using traditional vector control is prone to system operation instability when a single-phase short circuit occurs in the power grid

this paper proposes a simple and stable passivity-consensus based control method from the perspective of system energy. The first goal is to track the desired trajectories of positive sequence currents and suppress negative sequence currents rapidly. The model of port-controlled Hamiltonian with dissipation for MMC is established

and the “reactive force” which does not affect the global energy dissipation is obtained. Thus

the design of the passivity-based controller can be simplified and the global energy is minimized at the desired equilibrium point. The global asymptotic stability of the closed-loop control system is guaranteed. The second goal is to improve the tracking synchronousness of the desired trajectories of positive and negative sequence currents in the

coordinate system. The desired trajectory tracking errors of grid-connected currents between neighboring phases are introduced into the passivity-based control law as the state errors

and the consensus-based control method is integrated with the passivity-based method properly

to realize the synchronization of desired trajectories tracking of positive and negative sequence currents in the

coordinate system. The simulation results based on MATLAB/Simulink show that the proposed method has good dynamic and static performance

global stability and strong robustness when the single-phase short-circuit fault of the power grid occurs simultaneously with DC-side voltage step change

active power change and MMC parameter perturbation

respectively.

关键词

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references

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