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

Xinzhi Ding, Kai Yang, Weiyu Wang, Bin Liu, Xuejin Wang, Jie Zhang and Dayi Li
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Xinzhi Ding: School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, 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

Energies, 2022, vol. 15, issue 8, 1-13

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.

Keywords: fast saturation damper; ferromagnetic resonance; capacitor voltage transformer; mechanism; harmonic (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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