A sophisticated maximum capacity analysis for large turbine generators considering limitation of temperature

In this paper, the authors propose a sophisticated analysis method to determine possible maximum generator capacity and to evaluate the generator´s potential ability. The method is developed to survey generator design parameters on a large scale efficiently and objectively. The possible maximum generator capacity acquired by the proposed method satisfies the specifications of short circuit ratio, power factor and temperature limitations of armature and field windings. Armature voltage, armature current and field current are optimized simultaneously. An example adopting the proposed method is also shown in this paper. The results indicate the sensitivities of the calculated possible maximum generator capacity and the calculated loss for various development factors. The effectiveness of this method in the R&D phase is clarified by the example.