一种考虑寄生电容影响的H8逆变器共模电压抑制方法

高铭聚; 李珊瑚; 蔡敏; 刘旭; 孙庆国

doi:10.19912/j.0254-0096.tynxb.2024-0354

PDF(5110 KB)

太阳能学报 ›› 2025, Vol. 46 ›› Issue (7) : 614-623. DOI: 10.19912/j.0254-0096.tynxb.2024-0354

第二十七届中国科协年会学术论文

一种考虑寄生电容影响的H8逆变器共模电压抑制方法

高铭聚^1,2, 李珊瑚^1,2, 蔡敏^1,2, 刘旭^1,2, 孙庆国^1,2

作者信息 +

A COMMON-MODE VOLTAGE SUPPRESSION METHOD FOR H8 INVERTER CONSIDERING EFFECT OF PARASITIC CAPACITANCE

Gao Mingju^1,2, Li Shanhu^1,2, Cai Min^1,2, Liu Xu^1,2, Sun Qingguo^1,2

Author information +

文章历史 +

摘要

针对H8逆变器提出一种抑制共模电压的有效全开路零矢量调制策略。通过推导有效全开路零矢量下H8逆变器的共模电压时域模型,研究共模电压与直流母线开关管S₇、S₈结电容值和交流输出侧对地寄生电容之间的内在关系,定量分析共模电压值和系统效率随附加并联电容的变化趋势。为兼顾共模电压抑制效果和系统效率,S₇、S₈选择的附加并联电容值约为寄生电容值的30倍,将有效全开路零矢量下的共模电压降低到0,系统效率达到98%,同时避免死区问题引起的共模电压尖峰。最后通过实验验证上述方法的有效性。

Abstract

An effective full open-circuit zero-vector modulation strategy for suppressing common-mode voltage is proposed for H8 inverter. By deriving the common-mode voltage time-domain model of H8 inverter under the effective full open-circuit zero vector, the internal relationship between the common-mode voltage and the junction capacitances of DC bus S₇ and S₈ and the parasitic capacitance of the ac output side to the ground is studied. The variation trends of common-mode voltage and system efficiency with additional parasitic capacitance value is quantitatively analyzed. In order to take into account the common-mode voltage suppression effect and system efficiency, the additional parallel capacitances selected by S₇ and S₈ is approximately 30 times the value of the parasitic capacitance, and the common-mode voltage under the effective full open-circuit zero vector is reduced to 0. The system efficiency reaches 98%, while avoiding the common-mode voltage spike caused by the dead-time effect. Finally, the effectiveness of the above method is verified by experiments.

导出引用

高铭聚, 李珊瑚, 蔡敏, 刘旭, 孙庆国. 一种考虑寄生电容影响的H8逆变器共模电压抑制方法[J]. 太阳能学报. 2025, 46(7): 614-623 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0354

Gao Mingju, Li Shanhu, Cai Min, Liu Xu, Sun Qingguo. A COMMON-MODE VOLTAGE SUPPRESSION METHOD FOR H8 INVERTER CONSIDERING EFFECT OF PARASITIC CAPACITANCE[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 614-623 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0354

中图分类号： TM464

参考文献

[1] 鲁紫荆, 李珊瑚, 操孙鹏, 等. 一种大幅度减小间接矩阵变换器高频共模电压的调制策略[J]. 电工技术学报, 2023, 38(16): 4366-4375.
LU Z J, LI S H, CAO S P, et al.A modulation strategy for simultaneously reducing high-frequency common-mode voltage of indirect matrix converter[J]. Transactions of China Electrotechnical Society, 2023, 38(16): 4366-4375.
[2] 郭磊磊, 晋玉祥, 曹玲芝, 等. 基于混合非零矢量的电压源逆变器FCS模型预测共模电压抑制方法[J]. 太阳能学报, 2020, 41(11): 46-55.
GUO L L, JIN Y X, CAO L Z, et al.Hybrid nonzero vector-based FCS model predictive common-mode voltage reduction method for voltage source inverter[J]. Acta energiae solaris sinica, 2020, 41(11): 46-55.
[3] 王立乔, 林健, 朱文通, 等. 一种新型三相Buck-Boost光伏逆变器漏电流抑制研究[J]. 太阳能学报, 2022, 43(7): 101-108.
WANG L Q, LIN J, ZHU W T, et al.Research on leakage current suppression of a new three-phase buck-boost photovoltaic inverter[J]. Acta energiae solaris sinica, 2022, 43(7): 101-108.
[4] 郭磊磊, 金楠, 韩东许. 电压源逆变器模型预测共模电压尖峰抑制方法[J]. 太阳能学报, 2020, 41(3): 282-290.
GUO L L, JIN N, HAN D X.Model predictive common-mode voltage spike suppression method for voltage source inverter[J]. Acta energiae solaris sinica, 2020, 41(3): 282-290.
[5] 江师齐, 刘艺涛, 银杉, 等. 基于噪声源阻抗提取的单相逆变器电磁干扰滤波器的设计[J]. 电工技术学报, 2019, 34(17): 3552-3562.
JIANG S Q, LIU Y T, YIN S, et al.Electromagnetic interference filter design of single-phase inverter based on the noise source impedance extraction[J]. Transactions of China Electrotechnical Society, 2019, 34(17): 3552-3562.
[6] JUNG J H, HWANG S I, KIM J M.A common-mode voltage reduction method using an active power filter for a three-phase three-level NPC PWM converter[J]. IEEE transactions on industry applications, 2021, 57(4): 3787-3800.
[7] HAVA A M, ÜN E.Performance analysis of reduced common-mode voltage PWM methods and comparison with standard PWM methods for three-phase voltage-source inverters[J]. IEEE transactions on power electronics, 2009, 24(1): 241-252.
[8] UN E, HAVA A M.A near-state PWM method with reduced switching losses and reduced common-mode voltage for three-phase voltage source inverters[J]. IEEE transactions on industry applications, 2009, 45(2): 782-793.
[9] CONCARI L, BARATER D, BUTICCHI G, et al.H8 inverter for common-mode voltage reduction in electric drives[J]. IEEE transactions on industry applications, 2016, 52(5): 4010-4019.
[10] WANG M J, PEI X J, XIANG Y X, et al.Reduction of common mode voltage through improved three-phase inverter topology[C]//2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC). Shenzhen, China, 2018: 1-5.
[11] RAHIMI R, FARHANGI S, FARHANGI B, et al.H8 inverter to reduce leakage current in transformerless three-phase grid-connected photovoltaic systems[J]. IEEE journal of emerging and selected topics in power electronics, 2018, 6(2): 910-918.
[12] MORRIS C T, HAN D, SARLIOGLU B.Reduction of common mode voltage and conducted EMI through three-phase inverter topology[J]. IEEE transactions on power electronics, 2017, 32(3): 1720-1724.
[13] GUPTA A K, AGRAWAL H, AGARWAL V.A novel three-phase transformerless H-8 topology with reduced leakage current for grid-tied solar PV applications[J]. IEEE transactions on industry applications, 2019, 55(2): 1765-1774.
[14] GUO X Q, XU D, WU B.Three-phase DC-bypass topologies with reduced leakage current for transformerless PV systems[C]//2015 IEEE Energy Conversion Congress and Exposition (ECCE). Montreal, QC, Canada, 2015: 43-46.
[15] XIANG Y X, PEI X J, WANG M J, et al.An improved H8 topology for common-mode voltage reduction[J]. IEEE transactions on power electronics, 2019, 34(6): 5352-5361.
[16] FREDDY T K S, RAHIM N A, HEW W P, et al. Modulation techniques to reduce leakage current in three-phase transformerless H7 photovoltaic inverter[J]. IEEE transactions on industrial electronics, 2015, 62(1): 322-331.
[17] 马海啸, 应雯. 一种用于漏电流抑制的改进型H7逆变器[J]. 太阳能学报, 2023, 44(2): 460-467.
MA H X, YING W.An improved H7 inverter for leakage current suppression[J]. Acta energiae solaris sinica, 2023, 44(2): 460-467.
[18] 王宝诚, 郭小强, 杨勇, 等. 三电平四桥臂光伏逆变器漏电流抑制研究[J]. 中国电机工程学报, 2018, 38(14): 4194-4201.
WANG B C, GUO X Q, YANG Y, et al.Research on leakage current suppression for three-level four-leg PV inverter[J]. Proceedings of the CSEE, 2018, 38(14): 4194-4201.
[19] GUO X Q.Three-phase CH7 inverter with a new space vector modulation to reduce leakage current for transformerless photovoltaic systems[J]. IEEE journal of emerging and selected topics in power electronics, 2017, 5(2): 708-712.
[20] XU Y, WANG Z, LIU P C, et al.A soft-switching current-source-inverter-fed motor drive with reduced common-mode voltage[J]. IEEE transactions on industrial electronics, 2021, 68(4): 3012-3021.