A Topology Synthetization Method for Single-Phase, Full-Bridge, Transformerless Inverter with Leakage Current Suppression—Part II

Xiumei Yue, Hongliang Wang, Xiaonan Zhu, Xinwei Wei and Yan-Fei Liu
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Xiumei Yue: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Hongliang Wang: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Xiaonan Zhu: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Xinwei Wei: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Yan-Fei Liu: Department of Electrical and Computer Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada

Energies, 2020, vol. 13, issue 2, 1-23

Abstract: This paper proposes a topology derivation methodology to achieve small leakage current or zero leakage current for photovoltaic application. The core of the proposed method is a unified topology model and MN principle to show how to derive all possible topologies based on unipolar sinusoidal pulse width modulation (USPWM) and double-frequency USPWM (DFUSPWM). Part II of this paper discusses the topology synthetization method to achieve zero leakage current. Two types of neutral point clamped (NPC) topologies based on USPWM and DFUSPWM are elaborated. Two possible connections for the NPC cell are introduced, and detailed NPC topology derivation procedures are also provided. All existing NPC topologies are derived, and twenty-two new NPC topologies are found based on the new topology derivation methodology for a single-phase, full-bridge, transformerless inverter.

Keywords: transformerless inverter; full-bridge inverter; leakage current; NPC topology (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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