Aggregation of exciter models for constructing power system dynamic equivalents

Constructing a dynamic equivalent for a power system involves several steps: the partition of the system involves several steps: the partition of the system into coherent areas, the coherent area aggregation exciter models. A trajectory sensitivity method is used to tune the aggregate exciter parameters of the reduced models. The optimal results are used to evaluate the aggregation from the DYNRED program and a weighted the aggregation from the DYNRED program and a weighted MVA based method. A three-machine system with one coherent area satisfying the theoretical coherency conditions is used to investigate the impact of the variations of the individual generator, network, and excimer parameters on the aggregate exciter model parameters. The results are then applied to the exciter aggregation of a larger 48-machine system.