Advanced simulation techniques for the analysis of power system dynamics

A description is given of SIMPOW, a digital power system simulator for studies in which the access to realistic models of all established and future electrical equipment such as multiterminal HVDC systems, phasewise-controlled static VAr controllers, superconducting magnetic energy storage, flexible AC transmission systems, and other advanced technologies is essential. The basic design concept of SIMPOW is examined, covering functional parts, power-frequency models, instantaneous value models, user-defined modeling, man-machine communication, and power-flow solution and integration procedures. Simulation stages and event handling are briefly considered. To illustrate the use of the simulation techniques described, three typical problems to which they have been applied successfully are presented in detail. They are the balancing of traction loads by means of phasewise controlled static VAr controllers, bulk power transmission by a multiterminal HVDC system, and simulation of electrical machine dynamics. Further improvements that are planned for SIMPOW are described.<>