High Performance Single-Phase Single-Stage Grid-Tied PV Current Source Inverter Using Cascaded Harmonic Compensators

Nahla E. Zakzouk, Ahmed K. Abdelsalam, Ahmed A. Helal and Barry W. Williams
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Nahla E. Zakzouk: Electrical and Control Engineering Department, College of Engineering, Arab Academy for Science and Technology (AAST), Alexandria 1029, Egypt
Ahmed K. Abdelsalam: Electrical and Control Engineering Department, College of Engineering, Arab Academy for Science and Technology (AAST), Alexandria 1029, Egypt
Ahmed A. Helal: Electrical and Control Engineering Department, College of Engineering, Arab Academy for Science and Technology (AAST), Alexandria 1029, Egypt
Barry W. Williams: Electronics and Electrical Engineering Department, Faculty of Engineering, University of Strathclyde, Glasgow G11XQ, UK

Energies, 2020, vol. 13, issue 2, 1-29

Abstract: In this paper, a single-phase single-stage photovoltaic (PV) grid-tied system is investigated. The conventional pulse width modulated (PWM) voltage source inverter (VSI) is replaced by a PWM current source inverter (CSI) for its voltage boosting capabilities, inherent short-circuit proof and higher reliability features. Modeling, design, and analysis of the considered CSI are presented altogether with enhanced proposed control loops aided with a modified PWM technique. DC-link even current harmonics are commonly reflected as low-order odd harmonics in the grid resulting in a poor quality grid current. In order to overcome the latter, a high performance proportional resonant controller, applied in the inverter inner grid current loop, is proposed using cascaded resonant control units tuned at low-order frequencies to eliminate injected grid current harmonics. Hence, with a less-bulky smoothing inductor at the CSI DC-side, grid power quality and system efficiency are simultaneously improved. Simulation and experimental results verify the proposed controller effectiveness.

Keywords: photovoltaic; current source inverter; proportional resonant controller; cascaded harmonic compensator (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 (2)

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