Chapter 29
Symmetrical and Unsymmetrical Faults
Transitorios de circuito de la serie 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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Cortocircuito trifásico: máquina síncrona sin carga
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 ...
Cortocircuitos trifásicos del sistema de alimentación
In fault current analysis, transformers are modeled using leakage reactances, while transmission lines are represented by equivalent series reactances.
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Matriz de impedancia de bus
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 ...
Selección de disyuntores y fusibles
A circuit breaker interrupts fault currents by extinguishing the arc, which is elongated and cooled to stop the flow of electricity.
Breakers are ...
Redes secuenciales de máquinas rotativas
A Y-connected synchronous generator, grounded via neutral impedance, is designed to generate balanced internal phase voltages with only positive-sequence ...
Modelos de secuencia por unidad
An ideal Y-Y transformer grounded via neutral impedances has per-unit sequence networks similar to a single-phase transformer when balanced positive or ...
Tipos de fallos
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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