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With the rapid development of technology in power electronics field, commonly named nonlinear loads, such as large variable frequency drives, have harmonic components that distort grid power quality. In this context, the primary goal is to suppress the harmonic currents generated by a nonlinear load supplied by an electrical grid via the association of a SAPF (Shunt Active Power Filter). The system under study is composed of a 3-phase voltage inverter supplied by a PVG (Photovoltaic Generator), and connected to the network and a non-linear load (diode bridge rectifier). To address the power quality issue, LPF (Low Pass Filter) is used to extract the current harmonics of the studied nonlinear load. Then, the proposed control scheme is applied to suppress these harmonics and consequently the grid current waveform is enhanced during the system operating in MPPT mode. Simulation results show that the suggested solution is efficient in terms of harmonics suppression. As a result, the obtained THD (Total Harmonic Distortion) of grid current is not exceeding 5%, according to the IEEE standard.

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Enhancing Power Quality of a Solar Plant Integrated into Low Voltage Distribution Network in the Existence of Non-linear Load Through SAPF with LPF

  • 会议论文

  • 发表日期：

    2026年

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  • Atallah Ouai,
  • Hasan Köten

摘要

With the rapid development of technology in power electronics field, commonly named nonlinear loads, such as large variable frequency drives, have harmonic components that distort grid power quality. In this context, the primary goal is to suppress the harmonic currents generated by a nonlinear load supplied by an electrical grid via the association of a SAPF (Shunt Active Power Filter). The system under study is composed of a 3-phase voltage inverter supplied by a PVG (Photovoltaic Generator), and connected to the network and a non-linear load (diode bridge rectifier). To address the power quality issue, LPF (Low Pass Filter) is used to extract the current harmonics of the studied nonlinear load. Then, the proposed control scheme is applied to suppress these harmonics and consequently the grid current waveform is enhanced during the system operating in MPPT mode. Simulation results show that the suggested solution is efficient in terms of harmonics suppression. As a result, the obtained THD (Total Harmonic Distortion) of grid current is not exceeding 5%, according to the IEEE standard.