Abstract
In order to analyze the system dynamics of a large integrated power system, it is required to analyze the system composed with detail models of power system components such as generators, loads and transmission networks. As it is time consuming and laborious task to analyze the total detail power system, the aggregation method is efficient. This paper proposes the engineering-based aggregation method using modal analysis, to improve the analytical accuracy that is fatal defect of engineering-based aggregation method. Furthermore, the proposed method is verified by using two types of systems in which it is difficult to apply the existing engineering-based aggregation method; one is the system with different control constants and the other is the system with weak coherency. The proposed method is to adjust the constants of control system of the aggregated system using modal analysis based on typical engineering-based aggregation method such as “the short- circuit current method".
