High Performance Single-Phase Single-Stage Grid-Tied PV Current Source Inverter Using Cascaded Harmonic Compensators
1
Electrical and Control Engineering Department, College of Engineering, Arab Academy for Science and Technology (AAST), Alexandria 1029, Egypt
2
Electronics and Electrical Engineering Department, Faculty of Engineering, University of Strathclyde, Glasgow G11XQ, UK
*
Author to whom correspondence should be addressed.
Energies 2020, 13(2), 380; https://doi.org/10.3390/en13020380
Received: 2 December 2019 / Revised: 25 December 2019 / Accepted: 27 December 2019 / Published: 13 January 2020
(This article belongs to the Section Solar Energy and Photovoltaic Systems)
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.
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Keywords:
photovoltaic; current source inverter; proportional resonant controller; cascaded harmonic compensator
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MDPI and ACS Style
Zakzouk, N.E.; Abdelsalam, A.K.; Helal, A.A.; Williams, B.W. High Performance Single-Phase Single-Stage Grid-Tied PV Current Source Inverter Using Cascaded Harmonic Compensators. Energies 2020, 13, 380.
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