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Harmonic Analysis of Grid-Connected Solar PV Systems with Nonlinear Household Loads in Low-Voltage Distribution Networks

Author

Listed:
  • Syed Muhammad Ahsan

    (Department of Electrical Engineering, SBA School of Science and Engineering, LUMS, Lahore 54792, Pakistan)

  • Hassan Abbas Khan

    (Department of Electrical Engineering, SBA School of Science and Engineering, LUMS, Lahore 54792, Pakistan)

  • Akhtar Hussain

    (Department of Electrical Engineering, Incheon National University, Incheon 22012, Korea)

  • Sarmad Tariq

    (Department of Electrical Engineering, SBA School of Science and Engineering, LUMS, Lahore 54792, Pakistan)

  • Nauman Ahmad Zaffar

    (Department of Electrical Engineering, SBA School of Science and Engineering, LUMS, Lahore 54792, Pakistan)

Abstract

Grid-connected rooftop and ground-mounted solar photovoltaics (PV) systems have gained attraction globally in recent years due to (a) reduced PV module prices, (b) maturing inverter technology, and (c) incentives through feed-in tariff (FiT) or net metering. The large penetration of grid-connected PVs coupled with nonlinear loads and bidirectional power flows impacts grid voltage levels and total harmonic distortion (THD) at the low-voltage (LV) distribution feeder. In this study, LV power quality issues with significant nonlinear loads were evaluated at the point of common coupling (PCC). Various cases of PV penetration (0 to 100%) were evaluated for practical feeder data in a weak grid environment and tested at the radial modified IEEE-34 bus system to evaluate total harmonic distortion in the current (THD i ) and voltage (THD v ) at PCC along with the seasonal variations. Results showed lower active, reactive, and apparent power losses of 1.9, 2.6, and 3.3%, respectively, with 50% solar PV penetration in the LV network as the voltage profile of the LV network was significantly improved compared to the base case of no solar. Further, with 50% PV penetration, THD i and THD v at PCC were noted as 10.2 and 5.2%, respectively, which is within the IEEE benchmarks at LV.

Suggested Citation

  • Syed Muhammad Ahsan & Hassan Abbas Khan & Akhtar Hussain & Sarmad Tariq & Nauman Ahmad Zaffar, 2021. "Harmonic Analysis of Grid-Connected Solar PV Systems with Nonlinear Household Loads in Low-Voltage Distribution Networks," Sustainability, MDPI, vol. 13(7), pages 1-23, March.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:7:p:3709-:d:524749
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    References listed on IDEAS

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    Cited by:

    1. Krzysztof Chmielowiec & Łukasz Topolski & Aleks Piszczek & Tomasz Rodziewicz & Zbigniew Hanzelka, 2022. "Study on Energy Efficiency and Harmonic Emission of Photovoltaic Inverters," Energies, MDPI, vol. 15(8), pages 1-23, April.
    2. Tahir, Muhammad Usman & Siraj, Kiran & Ali Shah, Syed Faizan & Arshad, Naveed, 2023. "Evaluation of single-phase net metering to meet renewable energy targets: A case study from Pakistan," Energy Policy, Elsevier, vol. 172(C).

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