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In power plant having 4 generators:
gas turbine 1 and 2 (35 MVA each)
gas turbine 3 (10 MVA)
steam turbine (20 MVA) running on exhaust of gtg1 and gtg2
plant has a load of 60 MW and also supplying 15 MW to the utility through three feeders. complete blackout is observed when a load of 35 MW is tripped due to a fault. After that outgoing feeders are tripped on over current, gtg2 is tripped due to reverse power and finally a complete blackout due to over frequency of the system.
gtg2, gtg3 and stg operates in droop and pf control mode while gtg1 is in iso and voltage control mode.
1. What are the possible solutions to keep the system operating after the disconnection of 35 MW load?
2. i think if one generator is removed from the system (gtg2), then the system will be stable. is this possible to suddenly open the CB of generator when it is operating at full load? what are the consequences of doing this on turbine?
Thank you in advance
gas turbine 1 and 2 (35 MVA each)
gas turbine 3 (10 MVA)
steam turbine (20 MVA) running on exhaust of gtg1 and gtg2
plant has a load of 60 MW and also supplying 15 MW to the utility through three feeders. complete blackout is observed when a load of 35 MW is tripped due to a fault. After that outgoing feeders are tripped on over current, gtg2 is tripped due to reverse power and finally a complete blackout due to over frequency of the system.
gtg2, gtg3 and stg operates in droop and pf control mode while gtg1 is in iso and voltage control mode.
1. What are the possible solutions to keep the system operating after the disconnection of 35 MW load?
2. i think if one generator is removed from the system (gtg2), then the system will be stable. is this possible to suddenly open the CB of generator when it is operating at full load? what are the consequences of doing this on turbine?
Thank you in advance