Citation

Usoro PB, Rouhani R, Mehra RK, Varaiya P. Math. Model. 1983; 4(2): 143-165.

Copyright

(Copyright © 1983, Elsevier Publishing)

DOI

10.1016/0270-0255(83)90025-8

PMID

unavailable

Abstract

A physically based mathematical model for an electric power system is developed to provide an adequate test bed for the testing and evaluation of slow speed dynamics emergency state control strategies. This model incorporates all the major components of the system, includes explicit representations for all the major physical variables and control, and is capable of simulating a wide variety of emergency contingencies. The dependence of the overall power system's behavior on the response characteristics of mechanical prime movers and the limitations placed on the overall system's response by absolute power and power rate capability constraints of the prime movers are described. Certain stochastic aspects of the system's behavior as well as the mechanisms governing cascading failures, which have characterized many major power system collapses in recent years, are introduced; and problems concerning the control of electric power systems under emergency state operating conditions are identified. Simulations are presented to demonstrate the behavior of the system under normal and emergency operating conditions and to show the importance of tie-line interconnection, especially to a region that is importing power from the rest of the system, as well as the effects of governor control action, initial pressure limiter and generation schedule prior to disturbances.