This paper simulated a generator circuit breaker
model using ATP-EMTP simulation package. The frequency of
oscillations produced at current zero is reduced as the short
circuit current increased. At 80 kA short circuit a resignation is
happened at first current zero, while the success interruption is
happened at the second current zero, at a capacitance of 8.3nF.
As the short circuit current increases, more than 80 kA, the
circuit breaker fails to interrupt with the small terminal
capacitor, i.e. 8.3nF, 10nF and 20nF. The TRV is decreased as
the value of the terminal capacitor increased. At a certain value
of the terminal capacitor, the TRV is increased with increasing
the short circuit current. The RRRV decreases as the value of
the terminal capacitor increased. Also, at a certain value of the
terminal capacitance, the RRRV decreases with decreasing the
short circuit current. |
