METHOD FOR OPTIMIZING THE EFFICIENCY OF A MACHINE SET WITH A TURBINE AND A GENERATOR

摘要

A method for optimizing the efficiency of a set of machines comprising a double-controlled turbine and a generator. A correlation is determined between the efficiency beta , flow Q, variable height of fall H, gate opening DELTA gamma and runner opening phi on a model set of machines by test series. The determination yields a model optimum curve for the respective height of fall, the model optimum curve having the optimum gate opening as a function of flow and runner opening. An optimum efficiency for an operating point of a large-scale system is determined by, based on the model optimum curve, making variations of the gate opening DELTA gamma and of the runner opening phi on the large-scale system, the variations being such that the flow of the model set of machines would remain constant for the same variations, and wherein the flow of the large-scale system is also presumed to be constant. The power outputs before and after the variations are compared to determine stepwise the DELTA gamma / phi operating point with optimum efficiency.