Modified Discontinuous PWM Strategy for Three-Phase Grid-Connected PV Inverters With Hybrid Active-Passive Damping Scheme

被引：23

作者：

Giacomini, Julian C. ^{[1
]}

Michels, Leandro ^{[2
]}

Cavalcanti, Marcelo C. ^{[3
]}

Rech, Cassiano ^{[2
]}

机构：

[1] Farroupilha Fed Inst, BR-98280000 Panambi, Brazil

[2] Univ Fed Santa Maria, BR-97105900 Santa Maria, RS, Brazil

[3] Univ Fed Pernambuco, BR-50670901 Recife, PE, Brazil

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2020年 / 35卷 / 08期

关键词：

Inverters; Damping; Leakage currents; Power harmonic filters; Pulse width modulation; Monte Carlo methods; Discontinuous modulation; hybrid damping; leakage current; modified LCL filter (MLCL); LEAKAGE CURRENT ATTENUATION; PULSE-WIDTH MODULATION; MULTILEVEL CONVERTERS; CURRENT REDUCTION; LCL-FILTER; TRANSFORMERLESS; DESIGN; ELIMINATION; TOPOLOGY; SYSTEMS;

D O I：

10.1109/TPEL.2019.2961648

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This article proposes a modified discontinuous pulsewidth modulation (MDPWM) strategy for transformerless three-phase grid-connected photovoltaic (PV) inverters. MDPWM reduces the leakage current from PV inverter by reducing the magnitude of low-frequency harmonics presented in the common-mode voltage in comparison to classical discontinuous PWM technique. To enable the application of the MDPWM, a new hybrid active-passive damping scheme is proposed where common-mode and differential-mode dynamics are damped by passive and active schemes, respectively. Theoretical and experimental results show that the proposed scheme results in higher system efficiency in comparison to classic continuous PWM scheme keeping the leakage current reduced.

引用

页码：8063 / 8073

页数：11

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