电源学报

基于代数调制的中点钳位型三电平变换器共模电压抑制策略

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熊文静中国电源学会会员 ¹ , 朱欣 ¹ , 林建亨中国电源学会会员 ¹ , 粟梅 ¹ , 李鼎文 ² , 张明 ²

电源学报 | 电力电子变换器建模与控制 2026,24(1): 79-90

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电源学报 |电力电子变换器建模与控制 2026 , 24 (1) : 79 -90

基于代数调制的中点钳位型三电平变换器共模电压抑制策略

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熊文静中国电源学会会员¹, 朱欣¹, 林建亨中国电源学会会员¹, 粟梅¹, 李鼎文², 张明²

作者信息

^1.中南大学自动化学院，长沙　410083

^2.中国航发南方工业有限公司，株洲　412002

通讯作者:

林建亨（1994—　），男，中国电源学会会员，通信作者，博士，讲师。研究方向：电力电子变换器的建模与控制。E-mail：ljhljh@csu.edu.com。

作者简介:

熊文静（1991—　），女，中国电源学会会员，博士，副教授。研究方向：电力电子变换器的调制与控制策略，非正常工况下电压型逆变器的控制策略。E-mail：csu.xiong@163.com。

朱欣（1998—　），女，硕士研究生。研究方向：电力电子变换器的调制与控制策略。E-mail：csu_zhuxin0422@163.com。

粟梅（1967—　），女，博士，教授。研究方向：电力电子系统及控制。E-mail：sumeicsu@csu.edu.cn。

李鼎文（1988—　），男，本科，工程师。研究方向：控制部件系统设计与试验。E-mail：dingwen_li@sina.com。

张明（1986—　），男，本科，高级工程师。研究方向：控制器设计与试验。E-mail：ibaylor@163.com。

Common-mode Voltage Suppression Strategy for Neutral Point Clamped Three-level Converter Based on Algebraic Modulation

Wenjing XIONG Member, CPSS¹, Xin ZHU¹, Jianheng LIN Member, CPSS¹, Mei SU¹, Dingwen LI², Ming ZHANG²

Affiliations

^1.School of Automation, Central South University, Changsha 410083, China

^2.AECC South Industry Co., Ltd., Zhuzhou 412002, China

出版时间: 2026-01-30 doi: 10.13234/j.issn.2095-2805.2026.1.79

文章导航

摘要

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功率变换器采用脉宽调制时产生的高共模电压CMV（common-mode voltage）会使电机轴电压过高，进而导致高频高幅值轴电流破坏电机绝缘、增加电磁干扰等。为减小中点钳位型NPC（neutral point clamped）三电平变换器的共模电压，提出了基于代数调制框架的共模电压抑制策略：首先，将占空比的确定问题转化为非齐次线性方程组的求解问题；然后，合理地选择调制自由度以实现中点电压NPV（neutral point voltage）平衡控制的目标；其次，根据占空比约束，选择偏置量获取最终占空比；最后，使中间相开关采用反相载波得到新的开关状态组合，实现降低共模电压的目的。所提调制策略无需额外的控制器，实现简单，在保证中点钳位型三电平变换器的中点电压具有良好平衡特性的前提下，可将共模电压降低至直流侧电压的1/6范围内。实验结果验证了所提调制策略的有效性和可行性。

关键词

中点钳位型三电平变换器 / 代数调制 / 共模电压 / 中点电压平衡

Abstract

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The high common-mode voltage (CMV) generated by pulse-width modulation in a power converter will cause overvoltage on the motor shaft and further lead to the high-frequency high-amplitude current therein, thereby damaging the motor insulation and increasing the electromagnetic interference. To reduce the CMV of a neutral point clamped (NPC) three-level converter, a CMV suppression strategy based on the framework of algebraic modulation was proposed. First, the issue of duty-cycle assignment was transformed into a problem of solving non-homogeneous linear equations. Second, the degrees of freedom for modulation were properly selected to realize the objective of neutral point voltage (NPV) balance. Third, according to the duty-cycle constraints, the offset signals were selected to obtain the final duty-cycle. Finally, the switches in the phase with intermediate voltage values adopted inverse carrier to obtain a new combination of switching states, so as to reduce the CMV. The proposed modulation strategy can be easily implemented without additional controllers. On the premise of ensuring that the NPV of the NPC three-level converter has good balance characteristics, the CMV can be reduced to the range of one-sixth of the DC-side voltage. The effectiveness and feasibility of the proposed modulation strategy were validated by experimental results.

Key words

Neutral point clamped (NPC) three-level converter / algebraic modulation / common-mode voltage (CMV) / neutral point voltage (NPV) balance

引用本文

熊文静中国电源学会会员, 朱欣, 林建亨中国电源学会会员, 粟梅, 李鼎文, 张明. 基于代数调制的中点钳位型三电平变换器共模电压抑制策略. 电源学报, 2026 , 24 (1) : 79 -90 . DOI: 10.13234/j.issn.2095-2805.2026.1.79

Wenjing XIONG, Xin ZHU, Jianheng LIN, Mei SU, Dingwen LI, Ming ZHANG. Common-mode Voltage Suppression Strategy for Neutral Point Clamped Three-level Converter Based on Algebraic Modulation[J]. Journal of Power Supply, 2026 , 24 (1) : 79 -90 . DOI: 10.13234/j.issn.2095-2805.2026.1.79

基金

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国家自然科学基金资助项目(52377202; 61933011; 62125308)

参考文献

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参考文献引证文献

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2026年第24卷第1期

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文章信息

doi: 10.13234/j.issn.2095-2805.2026.1.79

接收时间：2023-04-28
首发时间：2026-10-26
出版时间：2026-01-30

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出版历史

收稿日期：2023-04-28
修回日期：2023-07-18
录用日期：2023-07-29

基金

National Natural Science Foundation of China(52377202; 61933011; 62125308)

国家自然科学基金资助项目(52377202; 61933011; 62125308)

作者信息

^1.中南大学自动化学院，长沙　410083

^2.中国航发南方工业有限公司，株洲　412002

通讯作者:

林建亨（1994—　），男，中国电源学会会员，通信作者，博士，讲师。研究方向：电力电子变换器的建模与控制。E-mail：ljhljh@csu.edu.com。

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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