Probabilistic framework for vulnerability analysis of coupling capacitor voltage transformer to ferroresonance phenomenon

Journal article (2020)

Authors

Mohsen Tajdinian Shiraz University
Mehdi Allahbakhshi Shiraz University
B. Behdani Shiraz University
Donya Behi Shiraz University
Ali Goodarzi Shiraz University
Affiliation
External organisation
Power transformers Capacitors Overvoltage protection Ferroresonance Probabilistic framework Power transmission protection Capacitor failure CCVT ferroresonance Coupling capacitor voltage transformer Ferroresonance phenomenon Ferroresonance suppression circuits Ferroresonant circuits Measurement transformer Potential transformers Power capacitors Power transmission faults Power transmission lines Protective devices
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Published Date

2020-5

Language

English

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Abstract

The performance of measurement transformers especially in transient phenomena affects the monitoring, control and protective devices. Coupling capacitor voltage transformer (CCVT) is a measurement transformer that may experience ferroresonance phenomenon due to the presence of capacitors and non-linear reactors. This study provides a probabilistic framework for investigation of ferroresonance phenomenon in CCVT. The aim of this investigation is to find out the area of the power system in which a CCVT is highly prone to experience ferroresonance phenomenon. Also through this framework the behaviour of the different types of ferroresonance suppression circuits and possible solutions to avoid or reduce the chance of ferroresonance will be discussed. The effects of several factors such as switching moment, different fault type and the fault inception angle are investigated. The investigation will be conducted considering the effects of single-pole auto-reclosing, three-pole auto-reclosing and capacitor failure in the CCVT. As shown in the simulation results, the presented framework can provide some useful information regarding the exposure level and severity of CCVT ferroresonance in the system.