An Optimized Transformerless Photovoltaic Grid-Connected Inverter

被引：314

作者：

Xiao, Huafeng ^{[1
]}

Xie, Shaojun ^{[1
]}

Chen, Yang ^{[1
]}

Huang, Ruhai ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Dept Elect Engn, Nanjing 210016, Peoples R China

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2011年 / 58卷 / 05期

关键词：

Clamping; common-mode voltage; full-bridge inverter; unipolar sinusoidal pulsewidth modulation (SPWM);

D O I：

10.1109/TIE.2010.2054056

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Unipolar sinusoidal pulsewidth modulation (SPWM) full-bridge inverter brings high-frequency common-mode voltage, which restricts its application in transformerless photovoltaic grid-connected inverters. In order to solve this problem, an optimized full-bridge structure with two additional switches and a capacitor divider is proposed in this paper, which guarantees that a freewheeling path is clamped to half input voltage in the freewheeling period. Sequentially, the high-frequency common-mode voltage has been avoided in the unipolar SPWM full-bridge inverter, and the output current flows through only three switches in the power processing period. In addition, a clamping branch makes the voltage stress of the added switches be equal to half input voltage. The operation and clamping modes are analyzed, and the total losses of power device of several existing topologies and proposed topology are fairly calculated. Finally, the common-mode performance of these topologies is compared by a universal prototype inverter rated at 1 kW.

引用

页码：1887 / 1895

页数：9

共 22 条

[11]

Mao Cheng-xiong, 2003, Proceedings of the CSEE, V23, P57

[12] Natural balancing of three-level neutral-point-clamped PWM inverters [J].

Mouton, HD .

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 2002, 49 (05) :1017-1025

[13]

Myrzik J.M. A., 2003, Proc. IEEE Bologna Power Tech Conf., Bologna, P430

[14] Electromagnetic transients simulation models for accurate representation of switching losses and thermal performance in power electronic systems [J].

Rajapakse, AD ;

Gole, AM ;

Wilson, PL .

IEEE TRANSACTIONS ON POWER DELIVERY, 2005, 20 (01) :319-327

[15]

Rüther R, 2003, WORL CON PHOTOVOLT E, P2294

[16] A single-stage PV module integrated converter based on a low-power current-source inverter [J].

Sahan, Benjamin ;

Vergara, Antonio Notholt ;

Henze, Norbert ;

Engler, Alfred ;

Zacharias, Peter .

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 2008, 55 (07) :2602-2609

[17]

Shammas N., 2004, P INT C MICR MONT SE

[18] A Practical Iron Loss Calculation for AC Filter Inductors Used in PWM Inverters [J].

Shimizu, Toshihisa ;

Iyasu, Seiji .

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 2009, 56 (07) :2600-2609

[19]

Stala R, 2009, IEEE T IND ELECTRON, V56, P2610, DOI 10.1109/TIE.2009.2021681

[20] A dual five-level inverter-fed induction motor drive with common-mode voltage elimination and dc-link capacitor voltage balancing using only the switching-state redundancy - Part II [J].

Tekwani, P. N. ;

Kanchan, R. S. ;

Gopakumar, K. .

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 2007, 54 (05) :2609-2617

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