S
HI.
AROUND 2 MONTHES AGO OUR OPERATOR INFORMED ME ABOUT RECIEVING "SRV NOT FOLLOWING COMMAND" ALARM IN ONE OF OUR GAS TURBINES (GE-MS_5002D / MARK VI ).
WHEN I MONITORED THAT THE FEEDBACK WAS 3.2% LESS THAN THE COMMAND. FROM THE COMMISSIONING TO THAT DATE I DID NOT SEE THAT PROBLEM SO I ASKED THEM TO STOP THE TURBINE TO RECTIFY THE PROBLEM. AFTER STOP THE TURBINE I DID STROK CHEDK AND FOUND THAT THE FEEDBACK WAS ALWAYS AROUND 1.1% LESS THAN THE COMMAND. AFTER ADJUSTING THE LVDT'S (0.7 VOLT) I DID LVDT AUTO CALIBRATION AND CHECKED THE STROK. STILL THERE WAS AROUND 1% ERROR. WE STARTED THE GAS TURBINE AGAIN AND WHEN IT GOT LOADED THE ERROR REACHED TO 2.5% AGAIN. BY PASSING THE TIME AFTER AROUND 2 WEEKS AGAIN WE GOT THE ALARM. WE DID NOT STOP IT AGAIN AND NOW SOMETIMES IT IS IN ALARM AND SOME TIMES IS OK (ALARM SET POINT = 3% AND TRIP SET POINT IS 5%).
PLEASE INFORM ME WHAT IS THE PROBLEM AND WHAT SHOULD I DO ?!!! THANKS.
AROUND 2 MONTHES AGO OUR OPERATOR INFORMED ME ABOUT RECIEVING "SRV NOT FOLLOWING COMMAND" ALARM IN ONE OF OUR GAS TURBINES (GE-MS_5002D / MARK VI ).
WHEN I MONITORED THAT THE FEEDBACK WAS 3.2% LESS THAN THE COMMAND. FROM THE COMMISSIONING TO THAT DATE I DID NOT SEE THAT PROBLEM SO I ASKED THEM TO STOP THE TURBINE TO RECTIFY THE PROBLEM. AFTER STOP THE TURBINE I DID STROK CHEDK AND FOUND THAT THE FEEDBACK WAS ALWAYS AROUND 1.1% LESS THAN THE COMMAND. AFTER ADJUSTING THE LVDT'S (0.7 VOLT) I DID LVDT AUTO CALIBRATION AND CHECKED THE STROK. STILL THERE WAS AROUND 1% ERROR. WE STARTED THE GAS TURBINE AGAIN AND WHEN IT GOT LOADED THE ERROR REACHED TO 2.5% AGAIN. BY PASSING THE TIME AFTER AROUND 2 WEEKS AGAIN WE GOT THE ALARM. WE DID NOT STOP IT AGAIN AND NOW SOMETIMES IT IS IN ALARM AND SOME TIMES IS OK (ALARM SET POINT = 3% AND TRIP SET POINT IS 5%).
PLEASE INFORM ME WHAT IS THE PROBLEM AND WHAT SHOULD I DO ?!!! THANKS.