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Ferro-Resonance Analysis of Capacitor Voltage Transformer with Fast Saturation Damper

Author

Listed:
  • Xinzhi Ding

    (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
    Yunnan Electric Power Test and Research Institute (Group) Co., Ltd., Kunming 650217, China)

  • Kai Yang

    (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Weiyu Wang

    (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Bin Liu

    (Bureau of Yunnan Power Grid Co., Ltd., Kunming 650217, China)

  • Xuejin Wang

    (Bureau of Yunnan Power Grid Co., Ltd., Kunming 650217, China)

  • Jie Zhang

    (Bureau of Yunnan Power Grid Co., Ltd., Kunming 650217, China)

  • Dayi Li

    (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract

With the increase in capacitor voltage transformer (CVT) operation life, CVT impedance changes, and the short-time switching of overhead lines, it is very easy to cause a transient oscillation accident in which a CVT participates, reduce the insulation level of a CVT, and even induce regional power grid oscillation and easily cause capacitor breakdown, after long-term operation with defects. In this paper, the whole power network, including the generator, power grid, and consumer, is modeled, and the theoretical model of the CVT ferro-resonance connected grid is built. The frequency spectrum analysis, and the measurements of resonance bus voltage and line voltage, were carried out to find the design method of a fast saturation damper (FSD) and its voltage–current characteristics that affect the vibration, based on theory and practice; this paper puts forward effective measures to reduce the resonance effect of a CVT in operation, and avoid the oscillation of the line and even the regional power grid system.

Suggested Citation

  • Xinzhi Ding & Kai Yang & Weiyu Wang & Bin Liu & Xuejin Wang & Jie Zhang & Dayi Li, 2022. "Ferro-Resonance Analysis of Capacitor Voltage Transformer with Fast Saturation Damper," Energies, MDPI, vol. 15(8), pages 1-13, April.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:8:p:2791-:d:791423
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