Izvorni znanstveni članak

GENERIC APPROACH TO CALCULATION OF SHORT CIRCUIT CURRENTS IN POWER TRANSFORMERS

Kosjenka Capuder ; Končar Power Transformers Ltd
Goran Plišić ; Končar Power Transformers Ltd
Željko Štih ; University of Zagreb, Faculty of Electrical Engineering and Computing

Sažetak

Power transformer in service is exposed to various voltage and current stresses. The ability to
withstand short circuit is an essential requirement for power transformers.
There are different types of short circuit: single - phase to earth, double - phase with or without
simultaneous earth fault and three - phase short circuit. These various short circuit conditions result in
different stress conditions for the windings. Mesh analysis and symmetrical components are the two
methods most commonly used for determining the magnitude of short circuit currents. In this paper, both
methods will be presented with results compared on a real-case transformer. Also, a generic scheme
using the symmetrical components approach is designed in order to standardize the short-circuit currents
calculation for all power transformer types and to reduce the time required for obtaining results.

Ključne riječi

power transformer; symmetrical components; short circuit; inductance matrix; model; mesh analysis

Hrčak ID:

199248

URI

https://hrcak.srce.hr/199248

Datum izdavanja:

15.8.2017.

Posjeta: 588 *