1. Observer based finite time sliding mode control strategies for single-stage grid-connected PV system with LCL filter
- Author
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Khan, Ahmad, Khan, Laiq, Khan, Qudrat, Ullah, Zahid, and Latif, Adil
- Abstract
The escalating global demand for clean and sustainable energy sources has trusted solar energy into the forefront of renewable energy (RE) solutions. Solar power generation, however, is profoundly influenced by ever-changing meteorological conditions, notably solar irradiation and temperature. These fluctuations have a direct impact on the voltage and current characteristics of photovoltaic arrays. To achieve optimal power transfer, a harmonious interface between the utility grid or load and solar panels is essential. In this research, the authors propose the integration of LCL filter to ameliorate harmonics emanating from inverter outputs. Additionally, a nonlinear control methodology is employed to maximize power extraction from Photovoltaic (PV) arrays at the Maximum Power Point (MPP) and to ensure a stable and less fluctuating injection of power into the grid. The primary goal of this work is to examine the effectiveness of nonlinear control techniques that assist in reducing harmonics and smoothing the output of solar power systems utilizing LCL filter. The controllers used here are nonlinear Super Twisting Reachability law-based Finite Time Sliding Mode Control (STR-FTSMC) and Arbitrary Order Finite Time Sliding Mode Control (AO-FTSMC) for the three-phase single-stage on-grid PV system in addition to sliding mode observer. The efficacy of the employed control techniques is highlighted via a comparative study in a MATLAB/Simulink environment.
- Published
- 2024
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