Study Total Harmonic Distortion in PI-Controlled Single-Stage Grid-Connected Photovoltaic Systems under Non-linear Load
Year: 2026
Type: article
Abstract: Concerns about power quality, particularly effects of Total Harmonic Distortion (THD) caused by non-linear loads, have increased due to the rapid integration of solar energy into the power grid. This paper presents a detailed study of THD content in grid-connected single-stage photovoltaic (PV) systems using proportional-integral (PI) controllers. Single-stage systems are preferred due to their simplicity and efficiency. The LCL filter is designed to attenuate the harmonic content. This paper employs a PI current-controlled strategy in conjunction with an LCL filter to maintain grid power quality. The system's performance is assessed under non-linear loading conditions with simulation-based modelling in MATLAB/Simulink for a single-stage grid-connected photovoltaic system.
Authors: Suman Pramanik, Tushar Gangopadhayay
Institution: Swami Vivekananda University
Language: English
Topic: Power Quality and Harmonics
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7203458145