APPLICATIONS OF DYNAMICMODELSINDISPATCHERTRAINING SIMULATORAND INOTHERSYSTEMDYNAMICPERFORMANCE STUDIES

Anumberofsteamturbine prime-mover models forextended systemdynamics simulation hasrecently evolved andbeendocumented fromplanning typeofstudies. Significant effort hasbeenexpended inthedevelopment resulting insome general awarenessofthis applicability. However, theeffective modelstructure as affected bylimited data,andindividual dynamicresponse characteristics of thesestate-of-the-art modelsremaintobeconsidered. Itwas notknownhowthesemodelsindividually respond dynamically intermsofclosed-loop responsetimeandnonlinear effects suchasdead-bands andlimits. Itwasalsonotknownhow wellthesemodelscan beusedina dispatcher training simula- tion.Thispaper presents computedresults ofindividual unit dynamic responsesoftwosuchmodelsouttoseveral minutes. Computations simulating loadfollowing andbreakeropening are included. The7 responsesshownonlinear effectsduetodead- bandsinseries withmajorcontrol paths.Theclosed-loop responsetimesarefoundtobenotdirectly related toanysingle timeparameterofthemodel. Effectsand limitations of integration timestepsandintegration methodsare illustrated. Theresults ofthecomputational studyshowthatthemodelscan beadapted fordispatcher training simulation, andtimesteps can beas long astwoseconds withappropriate choice ofintegration algorithm. Computational interface consideration forthesemodelsin other power systemstudies isalsoincluded inthispaper.