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Simulation and Protection of Reignition Overvoltage in Wind Farm Considering Microscopic Dielectric Recovery Process of Vacuum Circuit Breaker

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  • Ziheng Pu

    (College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China)

  • Hao Liu

    (College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China)

  • Yaoqiang Wang

    (Hainan Jinpan Electric Research Institute Co., Ltd., Wuhan 430074, China)

  • Xinyun Yu

    (College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China)

  • Tian Wu

    (College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China)

Abstract

The high amplitude and steep overvoltage generated by the breaking of the vacuum circuit breaker in the wind farm damages the inter-turn insulation of the transformer. There is a certain difference between the simulation results of the traditional reignition model and the measured overvoltage. It is necessary to improve the simulation model to simulate the overvoltage condition of the transformer more accurately and then select appropriate overvoltage protection measures. In this paper, based on the physical process of dielectric recovery during the opening process of the vacuum circuit breaker, a model of dielectric strength recovery is built to simulate the arc reignition of the vacuum circuit breaker. The model was applied to compare the overvoltage protection effects of RC snubbers, surge arresters, and choke coils. The simulation results show that the overvoltage amplitude and reignition times calculated by the model proposed in this paper are closer to the measured values. Compared with the traditional linear curve reignition model, the accuracy was increased by 24% and 51.2%, respectively. The parameter value of RC snubbers, the connection mode of surge arresters, and the combination mode of choke coil have an influence on overvoltage suppression. Finally, a suitable suppression scheme is proposed by installing a combined arrester on the high-voltage side of the transformer and connecting a choke coil in series, which can limit the phase-to-ground voltage and the phase-to-phase voltage to 2.43 p.u and 3.24 p.u, respectively, and reduce the steepness from 157.2 kV/μs to 22.3 kV/μs.

Suggested Citation

  • Ziheng Pu & Hao Liu & Yaoqiang Wang & Xinyun Yu & Tian Wu, 2023. "Simulation and Protection of Reignition Overvoltage in Wind Farm Considering Microscopic Dielectric Recovery Process of Vacuum Circuit Breaker," Energies, MDPI, vol. 16(4), pages 1-16, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:2070-:d:1074712
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    References listed on IDEAS

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    1. Jakob Glasdam & Claus Leth Bak & Jesper Hjerrild, 2012. "Transient Studies in Large Offshore Wind Farms Employing Detailed Circuit Breaker Representation," Energies, MDPI, vol. 5(7), pages 1-18, July.
    2. Ukashatu Abubakar & Saad Mekhilef & Hazlie Mokhlis & Mehdi Seyedmahmoudian & Ben Horan & Alex Stojcevski & Hussain Bassi & Muhyaddin Jamal Hosin Rawa, 2018. "Transient Faults in Wind Energy Conversion Systems: Analysis, Modelling Methodologies and Remedies," Energies, MDPI, vol. 11(9), pages 1-33, August.
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