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Impact of Solar Inverter Dynamics during Grid Restoration Period on Protection Schemes Based on Negative-Sequence Components

Author

Listed:
  • Almir Ekic

    (Department of Electrical and Computer Engineering, North Dakota State University, Fargo, ND 58105, USA)

  • Di Wu

    (Department of Electrical and Computer Engineering, North Dakota State University, Fargo, ND 58105, USA)

  • John N. Jiang

    (School of Electrical and Computer Engineering, University of Oklahoma, Norman, OK 73019, USA)

Abstract

The growing penetration of renewable resources such as wind and solar into the electric power grid through power electronic inverters is challenging grid protection. Due to the advanced inverter control algorithms, the inverter-based resources present fault responses different from conventional generators, which can fundamentally affect the way that the power grid is protected. This paper studied solar inverter dynamics focused on negative-sequence quantities during the restoration period following a grid disturbance by using a real-time digital simulator. It was found that solar inverters can act as negative-sequence sources to inject negative-sequence currents into the grid during the restoration period. The negative-sequence current can be affected by different operating conditions such as the number of inverters in service, grid strength, and grid fault types. Such negative-sequence responses can adversely impact the performance of protection schemes based on negative-sequence components and potentially cause relay maloperations during the grid restoration period, thus making system protection less secure and reliable.

Suggested Citation

  • Almir Ekic & Di Wu & John N. Jiang, 2022. "Impact of Solar Inverter Dynamics during Grid Restoration Period on Protection Schemes Based on Negative-Sequence Components," Energies, MDPI, vol. 15(12), pages 1-18, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:12:p:4360-:d:839183
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    References listed on IDEAS

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    1. Namki Choi & Bohyun Park & Hwanhee Cho & Byongjun Lee, 2019. "Impact of Momentary Cessation Voltage Level in Inverter-Based Resources on Increasing the Short Circuit Current," Sustainability, MDPI, vol. 11(4), pages 1-12, February.
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    Cited by:

    1. Enas Taha Sayed & Abdul Ghani Olabi & Abdul Hai Alami & Ali Radwan & Ayman Mdallal & Ahmed Rezk & Mohammad Ali Abdelkareem, 2023. "Renewable Energy and Energy Storage Systems," Energies, MDPI, vol. 16(3), pages 1-26, February.

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