Subtleties inside Simulation: 400KV Line Switching Controller Tuning and Validation By PSCAD, Point-on Wave Switching

#Subtleties Inside Simulation

• Someone may think is just a simple simulation but during simulation, you will notice or discover you are doing other types of phenomena simulation required.
• As we can see in this post for point-on wave simulation, will notice other phenomena like ferro-resonance, and zero-missing.
• Thus, this post is called Subtleties Inside Simulation.

• In certain cases, surge arresters are not suitable mitigation method to avoid slow front over-voltage SFO or switching over-voltage SOV.
• Point of wave switching eliminates any transient over-voltage at the line remote end, in terms of equipment aging point of view.

• Once phase-A switched at 0.2 sec, phase-B switched 120 deg as phase shift.
• In terms of time, 120 deg in a 60Hz system is 5.3ms {0.2+0.0053}

• As the upstream circuit breaker operates in single-pole operation for POW switching, engineering judgment for ferro-resonance observation is required to avoid reactor saturation.
• Also, you can notice zero-missing phenomena in the reactor current due to a compensation ratio of more than 50%.

#Subtleties Inside Simulation#PointOnWaveSwtiching#POW#PSCAD#Ferro-resonance#Zero-missing