Derivation of OCC Modulator for Grid-Tied Single-Stage Buck-Boost Inverter Operating in the Discontinuous Conduction Mode

Ben Zhao, Yigeng Huangfu and Alexander Abramovitz
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Ben Zhao: School of Automation, Northwestern Polytechnical University, Xi’an 710072, China
Yigeng Huangfu: School of Automation, Northwestern Polytechnical University, Xi’an 710072, China
Alexander Abramovitz: Department of Electrical Engineering, Holon Institute of Technology, Holon 58102, Israel

Energies, 2020, vol. 13, issue 12, 1-15

Abstract: This paper is concerned with the derivation of a one-cycle controller for driving a single-stage buck-boost DC-AC micro-inverter in grid-tied applications. The topology under study is based on a full-bridge switch arrangement with no unfolder circuit. The proposed micro-inverter attains a high gain by applying a multi-winding tapped inductor and, therefore, can operate at grid-level voltage without using a DC-DC step-up stage. To minimize the switching loss, the proposed inverter is operated in the discontinuous conduction mode. The operation principles of the proposed topology in the discontinuous conduction mode are discussed and analyzed. Based on the analysis, the one-cycle control law and modulator circuitry needed to control the proposed micro-inverter are developed. The feasibility of the proposed modulation scheme is verified by simulation.

Keywords: one-cycle control; grid-tied; single-stage; buck-boost; discontinuous conduction mode (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 references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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