Governor Performance During System Disturbances

This paper describes short-circuit tests which were made on a large power system under normal load conditions, in order to ascertain the operating characteristics of the system and the turbine governors during system disturbances. The introduction gives a brief description of the main features of the station and the connected System, a statement of the tests, and a list of the major conclusions. Part I covers the short-circuit tests on the system to determine the stability limits. Part II describes the load transfer and short-circuit tests to produce ``governor pumping.'' Part, III deals with the short circuits which were made to investigate the effect of a special valve mechanism on the stability limits. Part IV contains a discussion of miscellaneous tests, data, and general comments. In appendixes A and B, a detailed description of the system station and test equipment is given with estimates of the stability limits and short-circuit currents to be expected. Appendix C deals with the theory of the change in speed of a rotating body for a given energy differential.