Chapter 29
Symmetrical and Unsymmetrical Faults
Obwody przejściowe serii R—L
Consider a series R-L circuit.
When the switch closes at a time equal to zero, it mimics a three-phase short circuit in an unloaded synchronous machine.
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Zwarcie trójfazowe — nieobciążona maszyna synchroniczna
A three-phase short circuit test on an unloaded synchronous machine is conducted to study its impact.
The AC fault current's oscillogram with its DC ...
Zwarcia trójfazowe systemu elektroenergetycznego
In fault current analysis, transformers are modeled using leakage reactances, while transmission lines are represented by equivalent series reactances.
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Macierz impedancji magistrali
The calculation of subtransient fault currents for three-phase faults in an N-bus power system is modeled by the positive-sequence network. A three-phase ...
Wybór wyłącznika automatycznego i bezpiecznika
A circuit breaker interrupts fault currents by extinguishing the arc, which is elongated and cooled to stop the flow of electricity.
Breakers are ...
Sekwencyjne sieci maszyn wirujących
A Y-connected synchronous generator, grounded via neutral impedance, is designed to generate balanced internal phase voltages with only positive-sequence ...
Modele sekwencji na jednostkę
An ideal Y-Y transformer grounded via neutral impedances has per-unit sequence networks similar to a single-phase transformer when balanced positive or ...
Typy usterek
Consider a single line-to-ground fault from phase a to ground at a three-phase bus, including a fault impedance. This impedance is zero for a bolted ...
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