电源学报

一种可有效降低光伏逆变器共模电流的改进型DPWM策略

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吴良材 , 葛磊 , 于洋

电源学报 | 电磁干扰与电磁兼容 2026,24(3): 316-323

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电源学报 |电磁干扰与电磁兼容 2026 , 24 (3) : 316 -323

一种可有效降低光伏逆变器共模电流的改进型DPWM策略

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吴良材（1981—　），男，本科。研究方向：光伏、储能及电池系统开发。E-mail：liangcai.wu@growatt.com。

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葛磊（1985—　），男，本科。研究方向：光伏储能系统研究和开发。E-mail：lei.ge@growatt.com。

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吴良材, 葛磊, 于洋

作者信息

深圳古瑞瓦特新能源有限公司，深圳　518101

通讯作者:

于洋（1990—　），男，通信作者，硕士。研究方向：光伏逆变器并网算法的研究。E-mail：yang.yu@growatt.com。

作者简介:

吴良材（1981—　），男，本科。研究方向：光伏、储能及电池系统开发。E-mail：liangcai.wu@growatt.com。

葛磊（1985—　），男，本科。研究方向：光伏储能系统研究和开发。E-mail：lei.ge@growatt.com。

Improved DPWM Strategy for Effective Reduction of Common-mode Current in Photovoltaic Inverter

Liangcai WU, Lei GE, Yang YU

Affiliations

Shenzhen Growatt New Energy Co., Ltd., Shenzhen 518101, China

出版时间: 2026-03-30 doi: 10.13234/j.issn.2095-2805.2026.3.316

文章导航

摘要

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断续脉宽调制DPWM（discontinuous pulse width modulation）方法可有效降低开关损耗，提高系统效率。但此调制方式会引入高次共模电压，从而带来了电网电流质量变差和共模电流变大的问题。为解决此问题，提出了1种新型的DPWM方法，该方法在传统DPWM1钳位变化阶段注入3次正弦分量过渡，从而达到降低调制波中共模电压含量的目的。建立了光伏逆变器系统的共模回路模型，从理论上说明了DPWM下共模电流变大的原因。理论分析和实验结果证明，所提新型DPWM方法可在保证电流谐波总畸变率THDi（total harmonic current distortion）和共模电流与SVPWM相近的同时，提高光伏逆变器系统效率，起到兼顾输出电流质量和效率的作用。

关键词

共模电流 / 断续脉宽调制 / 光伏逆变器

Abstract

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The discontinuous pulse width modulation (DPWM) method can effectively reduce the switching loss and improve the system efficiency. However, it will also bring in high-order common-mode voltage, which results in an decline in the quality of grid current and an increase in the common-mode current (CMC). To solve this problem, a novel DPWM method is proposed, which can reduce the content of common-mode voltage in the modulation wave by injecting third-order sinusoidal signals into the wave under the traditional DPWM1 modulation at the clamping stage. A common-mode loop model of a photovoltaic inverter system is established, and the reason of the increasing CMC under the DPWM modulation is theoretically explained. The theoretical analysis and experimental results show that the proposed novel DPWM method can improve the efficiency of the photovoltaic inverter system while ensuring that the THDi and CMC are similar to those under the SVPWM modulation. As a result, good current quality and high efficiency are maintained simultaneously.

Key words

Common-mode current (CMC) / discontinuous pulse width modulation (DPWM) / photovoltaic inverter

引用本文

吴良材, 葛磊, 于洋. 一种可有效降低光伏逆变器共模电流的改进型DPWM策略. 电源学报, 2026 , 24 (3) : 316 -323 . DOI: 10.13234/j.issn.2095-2805.2026.3.316

Liangcai WU, Lei GE, Yang YU. Improved DPWM Strategy for Effective Reduction of Common-mode Current in Photovoltaic Inverter[J]. Journal of Power Supply, 2026 , 24 (3) : 316 -323 . DOI: 10.13234/j.issn.2095-2805.2026.3.316

参考文献

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2026年第24卷第3期

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文章信息

doi: 10.13234/j.issn.2095-2805.2026.3.316

接收时间：2023-11-09
首发时间：2026-10-29
出版时间：2026-03-30

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出版历史

收稿日期：2023-11-09
修回日期：2024-01-06
录用日期：2024-01-28

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作者信息

深圳古瑞瓦特新能源有限公司，深圳　518101

通讯作者:

于洋（1990—　），男，通信作者，硕士。研究方向：光伏逆变器并网算法的研究。E-mail：yang.yu@growatt.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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