hello every one
currently in one of our gas turbine (frame 6 mark 5 ) in start up ( utilizes Distillate fuel) when the rpm reaches to about 2200 to 2300 rpm, it seems the acceleration control loop do not perform properly and the control loop changes between temp control and acceleration control mode and the fluctuation in FSR between 14 to 20 appears then suddenly the gas turbine tripped due to over temp trip alarm (actually because excess fuel injection because lack of proper control). also all of the fuel line including the tubes, flow divider, check valves, servo valve, nozzles, bypass valve are checked and are OK, however the possibility of failure of 3 cards simultaneously is unlikely (also all cards have about one FSR in this situation)
also there is no problem in starting the gas turbine using gas fuel
also when the gas turbine goes to full speed even using Distillate fuel there is no problem.
I appreciate your guiding me regarding this.
currently in one of our gas turbine (frame 6 mark 5 ) in start up ( utilizes Distillate fuel) when the rpm reaches to about 2200 to 2300 rpm, it seems the acceleration control loop do not perform properly and the control loop changes between temp control and acceleration control mode and the fluctuation in FSR between 14 to 20 appears then suddenly the gas turbine tripped due to over temp trip alarm (actually because excess fuel injection because lack of proper control). also all of the fuel line including the tubes, flow divider, check valves, servo valve, nozzles, bypass valve are checked and are OK, however the possibility of failure of 3 cards simultaneously is unlikely (also all cards have about one FSR in this situation)
also there is no problem in starting the gas turbine using gas fuel
also when the gas turbine goes to full speed even using Distillate fuel there is no problem.
I appreciate your guiding me regarding this.