Title: Validation of current source inverter with lesser input inductor for grid integrated photovoltaic system

Authors: Esther Jennifer Isaac; Mini Rajeev

Addresses: Department of Electrical Engineering, Fr. C. Rodrigues Institute of Technology, Sector 9-A, Vashi, Navi Mumbai – 400703, India ' Department of Electrical Engineering, Fr. C. Rodrigues Institute of Technology, Sector 9-A, Vashi, Navi Mumbai – 400703, India

Abstract: In small scale applications, single phase current source inverter (CSI) is a viable choice, if the input inductor size is reduced without affecting its performance parameters. In this paper, simulation and implementation of a modified CSI structure that uses a smaller input inductor is presented. CSI is controlled for injecting active power into the grid with good waveform quality, utilising d-q transformation theory. Design is verified through simulation and by implementing a prototype constructed in the laboratory. Dynamic performance of the prototype in closed loop is verified by varying the reference current. Both simulation and hardware results are presented. Additionally, a mathematical model of power loss including effects of current ripple is derived for modified and conventional CSI, thereby proving the superiority of the modified CSI.

Keywords: current source inverter; grid-PV interface; harmonic distortion; inverter; losses; sinusoidal pulse width modulation; SPWM.

DOI: 10.1504/IJPELEC.2026.150272

International Journal of Power Electronics, 2026 Vol.22 No.1, pp.45 - 66

Received: 23 Nov 2024
Accepted: 26 Apr 2025
Published online: 06 Dec 2025 *

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