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

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  • Raushan, Vikash Kumar
  • Peddapati, Sankar

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.

Suggested Citation

  • Raushan, Vikash Kumar & Peddapati, Sankar, 2025. "MPPT without PV-side sensors in grid-connected PV systems via synchronous-frame grid current control," Renewable Energy, Elsevier, vol. 255(C).
    • Handle: RePEc:eee:renene:v:255:y:2025:i:c:s0960148125014727
    DOI: 10.1016/j.renene.2025.123808
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    References listed on IDEAS

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    1. Adel O. Baatiah & Ali M. Eltamaly & Majed A. Alotaibi, 2023. "Improving Photovoltaic MPPT Performance through PSO Dynamic Swarm Size Reduction," Energies, MDPI, vol. 16(18), pages 1-15, September.
    2. Ashwin Kumar Devarakonda & Natarajan Karuppiah & Tamilselvi Selvaraj & Praveen Kumar Balachandran & Ravivarman Shanmugasundaram & Tomonobu Senjyu, 2022. "A Comparative Analysis of Maximum Power Point Techniques for Solar Photovoltaic Systems," Energies, MDPI, vol. 15(22), pages 1-30, November.
    3. Smara, Z. & Aissat, A. & Deboucha, H. & Rezk, H. & Mekhilef, S., 2024. "An enhanced global MPPT method to mitigate overheating in PV systems under partial shading conditions," Renewable Energy, Elsevier, vol. 234(C).
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