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<p>This paper evaluates the performance of various Phase-Locked Loops (PLL) based control techniques in the context of renewable energy specifically for Solar PV integration and power grid synchronization. The controllers used in this investigation include traditional PLL along with advanced counterparts such as: Second-Order Generalized Integrator (SOGI) PLL (SOGI-PLL), Cascaded SOGI-PLL (CSOGI-PLL), Extended PLL (EPLL), and a proposed technique which is a novel SOGI-based EPLL (SOGI-EPLL). Each controller’s response has been tested under various disturbances, including changes in amplitude, frequency, DC offset, and harmonic components to assess its effectiveness in achieving stable and accurate control. The results obtained by simulationl analysis in terms of settling time revealed that the proposed SOGI-EPLL technique shows its efficiency by achieving stable operation with minimum delay of 2 ms. On the other hand, traditional PLL exhibited longer settling time specifically at the time of disturbances. Further, this paper also investigates the performance of all the methods in terms of frequency overshoot, peak phase error of 0.00005&#xa0;Hz and 0.00005 degree respectively by proposed technique which quantifies the deviation of the output frequency and phase from the desired parameter before stabilization in all the above mentioned disturbances.</p>

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Performance Improvement of Single Phase Grid Connected Solar PV System Using SOGI-EPLL Under Grid Disturbances

  • 期刊论文

  • 发表日期：

    2025年9月30日

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  • Ashish Jaglan,
  • Sumit Saroha,
  • Abhishek Panchal,
  • Pardeep Singla,
  • Kalyan Singh

摘要

This paper evaluates the performance of various Phase-Locked Loops (PLL) based control techniques in the context of renewable energy specifically for Solar PV integration and power grid synchronization. The controllers used in this investigation include traditional PLL along with advanced counterparts such as: Second-Order Generalized Integrator (SOGI) PLL (SOGI-PLL), Cascaded SOGI-PLL (CSOGI-PLL), Extended PLL (EPLL), and a proposed technique which is a novel SOGI-based EPLL (SOGI-EPLL). Each controller’s response has been tested under various disturbances, including changes in amplitude, frequency, DC offset, and harmonic components to assess its effectiveness in achieving stable and accurate control. The results obtained by simulationl analysis in terms of settling time revealed that the proposed SOGI-EPLL technique shows its efficiency by achieving stable operation with minimum delay of 2 ms. On the other hand, traditional PLL exhibited longer settling time specifically at the time of disturbances. Further, this paper also investigates the performance of all the methods in terms of frequency overshoot, peak phase error of 0.00005 Hz and 0.00005 degree respectively by proposed technique which quantifies the deviation of the output frequency and phase from the desired parameter before stabilization in all the above mentioned disturbances.