Study On Operation-optimization Of Gas-Steam Combined Cycle Plant Unit

Along with technical advance in science and with the increasing of people'senvironmental protection consciousness, gas turbine and combined cycle plantsare more and more important in electric power industry. For the sake of demand of national economy development, China import 21 sets gasturbine and combined cycle units. How to making the operation of these machines moreeconomic become one of the questions need to be settled urgently. This article chooses a S109FA combined cycle unit with unfired, triplepressure HRSG with reheater, made by GE Co. as study object, set up a theorymodel, and workout a suit of software to calculate the optimal operationparameters of combined cycle unit in different gas turbine inlet temperature,and keep the unit's electric efficiency in the highest level, and based on theseresults, analyze these parameters' influence to the combined cycle efficiency.Thses results have upper reference value to the acting operation of the combinedcycle units.