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, Barry W. Williams

Research output: Contribution to journalArticle

4 Citations (Scopus)
3 Downloads (Pure)

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.
Original languageEnglish
Article number380
Number of pages29
JournalEnergies
Volume13
Issue number2
DOIs
Publication statusPublished - 13 Jan 2020

Keywords

  • photovoltaic (PV)
  • current source inverter
  • proportional resonant controller
  • cascaded harmonic compensator

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