Identification of excitation system parameters

A comprehensive set of tests were conducted to determine the parameters of the excitation system of a turbo-generator. Various test methods were investigated during preliminary tests on the isolated regulator. As a result of these, small-signal frequency response measurements were carried out on the excitation system with the generator on-line. In addition, the response of various generator and excitation variables were recorded following faults on the power system. From the frequency response tests and the fault recordings, small-, medium-, and large-signal models of the excitation system were proposed.