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The Influence of Pressure on the Discharge along Oil-Paper Interface under AC Stress

Author

Listed:
  • Guangcai Hu

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Guangning Wu

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Rui Yu

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Peng Zhou

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Bo Gao

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Yan Yang

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Kai Liu

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

Abstract

This study explores the influence of hydrostatic pressure on the discharge along the oil-paper interface under AC voltage, especially for the normal operating condition and breakdown. In this paper, an experimental platform was set up to record the partial discharge (PD) parameters of the test sample under different hydrostatic pressures, while the applied AC voltage was increased to final flashover voltage step by step. Experimental results showed that higher hydrostatic pressure had different effects on PD under different voltages. Higher pressure decreased the PD energy and increased the flashover voltage. Furthermore, under higher hydrostatic pressure, discharge traces (white mark) were found on the surface of the samples after intense discharging on the oil-paper interfaces, indicating that the hydrostatic pressure can affect the gas generation and dissipation process underneath the surface of the pressboards. Finally, the mechanism of how hydrostatic pressure influences the PD, flashover voltage, and white mark was interpreted based on the bubble theory. The results derived in this paper can be helpful for an optimal design and reasonable operation of oil-paper insulation systems, especially for power transformers.

Suggested Citation

  • Guangcai Hu & Guangning Wu & Rui Yu & Peng Zhou & Bo Gao & Yan Yang & Kai Liu, 2019. "The Influence of Pressure on the Discharge along Oil-Paper Interface under AC Stress," Energies, MDPI, vol. 12(10), pages 1-16, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:10:p:1846-:d:231363
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    Cited by:

    1. Guangquan Zhang & Xueqin Zhang & Bo Wang & Yujun Guo & Guoqiang Gao & Guangning Wu, 2022. "Study on the Discharge Characteristics along the Surface and Charge Movement Characteristics of Insulating Media in an Airflow Environment," Energies, MDPI, vol. 15(10), pages 1-19, May.

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