The transient response of instrument transformers affects the performance of high-speed relays, particularly speed and overreach in case of distance protection. Transient response of a capacitive voltage transformer depends on the type of ferro-resonance suppression circuit (FSC), i.e., active, passive, or electronic, provided in the secondary to damp the ferro-resonant oscillations. The objective of this article is not to estimate optimum resistance but to provide a systematic approach instead of the trial-and-error approach to estimate damping resistance for the electronic ferro-resonance suppression circuit used in the: capacitive voltage transformer for protective relaying application. The performance of the numerical distance relay for the: capacitive voltage transformer with estimated damping resistance in the electronic ferro- resonance suppression circuit is tested and validated in real time using a field programmable gate array.
Estimation of Electronic Suppression Circuit Resistance for Protective Relaying Applications
2015
Aufsatz (Zeitschrift)
Englisch
frequency dependent line model , active , hardware description language , secondary arc , Circuits , antialiasing filter , relay mal-operation , Electrical currents , transient response , Estimating techniques , Real time , alternative transient program , models language , real time testing , Verilog , Transformers , passive , electronic
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