G1 is offline and you are ramping G2 from 40 to 10 (using PID as you should). Is there a maximum ramp rate? What would you do if G2 tripped offline and locked out at 30 MW?
Yes there are ramp rates. When plant total is 40MW or less, maximum generation decrease rate is 1.5MW/min which should executed with PID. If G2 tripped offline, start G1 and bring it up to the last known value of G2 before it tripped and continue ramp down at 1.5 MW/min to 10MW, wait 5 min before shutting down. Notify PSOSE of violation.