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A Topology Synthetization Method for Single-Phase, Full-Bridge, Transformerless Inverter with Leakage Current Suppression Part I
Open AccessArticle

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

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College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
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Department of Electrical and Computer Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada
*
Author to whom correspondence should be addressed.
Energies 2020, 13(2), 446; https://doi.org/10.3390/en13020446
Received: 23 November 2019 / Revised: 6 January 2020 / Accepted: 7 January 2020 / Published: 16 January 2020
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 transformerless inverter; full-bridge inverter; leakage current; NPC topology
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MDPI and ACS Style

Yue, X.; Wang, H.; Zhu, X.; Wei, X.; Liu, Y.-F. A Topology Synthetization Method for Single-Phase, Full-Bridge, Transformerless Inverter with Leakage Current Suppression—Part II. Energies 2020, 13, 446.

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