Izvorni znanstveni članak

https://doi.org/10.37798/2024732520

Proposal of Testing Procedure for Resonance and Ferroresonance Inception Possibility in Instrument Transformers

Bruno Jurišić orcid.org/0000-0002-9950-5724 ; Končar - Electrical Engineering Institute Ltd., Zagreb, Croatia *
Marijan Perković ; Končar - Electrical Engineering Institute Ltd., Zagreb, Croatia
Ivan Novko ; Končar - Electrical Engineering Institute Ltd., Zagreb, Croatia
Luka Kovačić ; Končar - Instrument Transformers Inc., Zagreb, Croatia
Igor Žiger ; Končar - Instrument Transformers Inc., Zagreb, Croatia
Tomislav Župan ; Končar - Electrical Engineering Institute Ltd., Zagreb, Croatia

* Dopisni autor.

Sažetak

This paper deals with the possibility of ferroresonance occurence in the interaction between circuit breakers and inductive instrument transformers. Existing standards lack guidance on testing for ferroresonant behaviour. The paper proposes a standardized testing procedure and presents measurements on a full-scale system. EMTP simulations complement the measurements for a broader network topology analysis, i.e. circuit breaker capacitance combinations. EMTP simulations are validated for a 170 kV voltage transformer and a combined instrument transformer, showing accuracy within 10%. The paper also extends the EMTP modelling application to a 420 kV voltage power transformer during design phase, ensuring it doesn't experience ferroresonance. This study offers a practical approach for testing and simulating ferroresonance in inductive instrument transformers, contributing to the safe operation of power networks.

Ključne riječi

Circuit breaker; EMTP; ferroresonance; laboratory testing; resonance; voltage power transformer

Hrčak ID:

319088

URI

https://hrcak.srce.hr/319088

Datum izdavanja:

4.6.2024.

Posjeta: 133 *