Taking 9FA gas turbine as the research object,on the premise of fully mastering the composition and working mechanism of gas turbine purge system,the control logic was deeply analyzed.According to the limit switch of purge valve and the pressure switch between valves,32 potential operating conditions of purge system can be arranged and combined,and their fault degrees were defined respectively,and the relevant fault type library was established.Further formulate corresponding preventive strategies according to the differences of combustion mode and fault degree in the actual operation of the unit.Through the effective analysis of the purge system control logic,mastering the logic realization mechanism of combustion mode locking,automatic shutdown,protection tripping,etc.,it is helpful to find out the problems in the operation of the purge system as soon as possible,further improve the reliability of the operation of the gas turbine purge system,and escort the safe and stable operation of the unit.
gas turbinepurge systemcombustion mode transitionmain protection
NETL
NSTL
万方数据
维普
