MPPT without PV-side sensors in grid-connected PV systems via synchronous-frame grid current control

Vikash Kumar Raushan and Sankar Peddapati

Renewable Energy, 2025, vol. 255, issue C

Abstract: Maximum power point tracking (MPPT) enables higher energy extraction from the photovoltaic (PV) system and hence it becomes inevitable. In two-stage grid connected photovoltaic system, the MPPT algorithm generates duty ratio of DC-DC converter with PV voltage and PV current as the inputs, which demand sensors. This paper presents, use of synchronous-frame grid current for the first time in maximum power point tracking replacing PV-side sensors. Here, hill climbing and particle swarm optimization (PSO) is modified in maximizing the synchronous-frame grid current to ensure maximum power injection into grid. Further, a 2kWp PV grid integrated setup is made and the viability of proposed synchronous-frame grid current based MPPT control techniques are verified under different irradiance and partial shading conditions. The presented works demonstrates promising in reducing the overall cost by 28.57 % due to the savings resulting from the sensors that are no longer required in PV side without compromising tracking characteristics ensuring sinusoidal current injection into the grid. Further, synchronous-frame grid current based PSO is shown guaranteed convergence to MPPT with higher tracking efficiency (>95 %) for all shading patterns.

Keywords: Maximum power point tracking (MPPT); Solar photovoltaics (PV); Partial shading; Reduced sensors (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:255:y:2025:i:c:s0960148125014727

DOI: 10.1016/j.renene.2025.123808

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