基于首尾衔接调制的无冗余 MMC 暂态共模电压抑制策略

孙孝峰; 郭俊杰; 尤燕飞; 王紫喆; 滕甲训; 齐磊; 李昕

引用本文:	孙孝峰,郭俊杰,尤燕飞,等.基于首尾衔接调制的无冗余 MMC 暂态共模电压抑制策略[J].电力系统保护与控制,2026,54(11):72-83.
	SUN Xiaofeng,GUO Junjie,YOU Yanfei,et al.Transient common-mode voltage suppression strategy for MMC without redundant submodules based on head-tail connection modulation[J].Power System Protection and Control,2026,54(11):72-83

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基于首尾衔接调制的无冗余 MMC 暂态共模电压抑制策略
孙孝峰¹，郭俊杰¹，尤燕飞²，王紫喆¹，滕甲训¹，齐磊¹，李昕¹
1. 燕山大学电力电子节能与传动控制河北省重点实验室，河北秦皇岛 066004；2. 天津工业大学电气工程学院，天津 300387

摘要:

子模块故障是模块化多电平换流器 (modular multilevel converter, MMC) 中存在的典型问题，现有穿越策略研究中未能兼顾考虑 MMC 的暂态过程共模电压 (common mode voltage, CMV)。针对这一问题，提出了一种无冗余 MMC 子模块故障下暂态 CMV 调制级抑制策略。首先基于首尾衔接调制控制任意时刻投入运行的上、下桥臂子模块的数量相同，实现稳态运行下的 CMV 抑制。然后在首尾衔接调制下进行子模块故障穿越和补偿策略设计以实现暂态 CMV 抑制，且无需抬高故障桥臂电容电压。从稳、暂态 CMV 机理出发，对所提调制与补偿方案的原理、实现过程、实现效果与改进方案进行了探讨。仿真与实验验证了所提方案的正确性与有效性。

关键词: 模块化多电平换流器子模块故障首尾衔接调制暂态共模电压故障补偿策略

DOI：10.19783/j.cnki.pspc.251332

分类号:

基金项目:河北省自然科学基金项目资助 (E2026203057)；河北省自然科学基金重点项目资助 (E2024203258)；燕山大学基础创新科研培育项目资助 (2025LGQN011)

Transient common-mode voltage suppression strategy for MMC without redundant submodules based on head-tail connection modulation

SUN Xiaofeng¹, GUO Junjie¹, YOU Yanfei², WANG Zizhe¹, TENG Jiaxun¹, QI Lei¹, LI Xin¹

1. Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province, Yanshan University, Qinhuangdao 066004, China; 2. School of Electrical Engineering, Tianjin University of Technology, Tianjin 300387, China

Abstract:

Submodule faults are typical problems in modular multilevel converter (MMC) systems. Existing ride-through strategies often fail to adequately consider the transient common mode voltage (CMV) during dynamic processes. To address this issue, a transient CMV modulation and suppression strategy for MMC submodule faults without redundancy is proposed. First, based on the head-tail connection modulation control, the number of inserted submodules in the upper and lower arms at any instant remains equal, thereby achieving CMV suppression under steady-state operation. Then, under this modulation framework, a submodule fault ride-through and compensation strategy is designed to achieve transient CMV suppression without raising the fault arm capacitor voltage. From the perspective of steady-state and transient CMV mechanisms, the principles, implementation process, performance characteristics, and possible improvements of the proposed modulation and compensation scheme are discussed. Finally, simulation and experimental results verify the correctness and effectiveness of the proposed scheme.

Key words: modular multilevel converter (MMC) sub-module fault head-tail connection modulation transient common-mode voltage fault compensation strategy

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