Methods of Determining Regulator Parameters for Power System Dynamic Equivalents

Abstract

In this paper, two novel methods are proposed for determining the regulator parameters in the construction of power system dynamic equivalents based on coherency. The methods are based on the idea that the governor of the equivalent generator should have the characteristics which are the sum of the characteristics of the governors of the generators belonging to the coherent groups. Also, AVR should have the average characteristics of the AVRs of the coherent generators. The indicial response or the frequency response is used as the representative characteristic, and the equivalent parameters are determined so as to approximate the above ideal characteristics. The methods are applied to the construction of a dynamic equivalent of a sample ten-machine system, and their validity is examined.