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

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...

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Bibliographic Details
Published inEnergies (Basel) Vol. 15; no. 8; p. 2791
Main Authors Ding, Xinzhi, Yang, Kai, Wang, Weiyu, Liu, Bin, Wang, Xuejin, Zhang, Jie, Li, Dayi
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 11.04.2022
Subjects
capacitor voltage transformer
Capacitors
fast saturation damper
ferromagnetic resonance
Frequency analysis
Frequency spectrum
harmonic
Insulation
Line voltage
Load
mechanism
Parameter identification
Participation
Power lines
Resonance
Saturation
Simulation
Spectrum analysis
Transient oscillations
Vibration
Voltage
Voltage transformers
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Summary: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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15082791