Performance analysis of a low-cost current-source 1-ph grid-connected PV inverter

Authors: GÜRHAN ERTAŞGIN, WEN LIANG SOONG, NESIMI ERTUGRUL

Abstract: This paper investigates the design and performance of a 150 W single-phase current-source grid-connected inverter topology that is based on a PV array and DC link inductor acting as a constant-current source. The inverter is implemented using a single boost switch, an H-bridge inverter, and a CL output filter. The inverter output current is simply controlled using the boost switch and open-loop or feedforward control. The dark I-V configuration is used to simulate two series PV modules. Comprehensive test results are obtained to validate the computer simulation results. Furthermore, the proposed inverter's ability to deliver a sinusoidal current to the grid while meeting the appropriate standards, i.e. total harmonic distortion and power factor requirements, is also examined for various modulation index values and irradiances.

Keywords: Photovoltaic cells, pulse width modulation inverters, solar power generation, switching converters

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