Is there a way to reconnect an induction motor dynamic model (I am using CIM6BL) once the connected voltage has recovered? Or will I have to write a controller UDM to do this?
Trip the motor by changing the load status to 0.
Reconnect the motor by changing the load status to 1.
Thanks! Am I able to do this inside a UDM, which is attached to another component? i.e. based on a flag or trigger inside the UDM, then disconnect/reconnect the motor?
Yes, it can be done in a UDM, however on a second thought maybe it is not physically correct to reconnect a tripped induction motor. If the the STATES in the motor a freezed when the motor is tripped the results will be wrong.
Plot the motor speed. If the speed is constant during the interval the motor is tripped the results are not correct. You have to check how PSSE handles a disconnected motor.
Ok, when the motor is tripped the speed is constant at -1.0 pu. I have also tried manually setting the load in/out of service and that causes severe instability. Otherwise, if I let the motor ride through the voltage contingency, upon voltage recovery the motor also becomes unstable.
Comments
What do you mean with reconnect? Is the motor on-line at start of simulation and tripped?
I aim to disconnect it at certain voltage ranges (either trip the machine or open breaker) and reconnect it once the voltage has recovered to normal range