Generating Detailed SoftwareModels of Microprocessor-BasedRelays
Xiaorong Xie · 2006
I--Computer models ofrelays playanimportant roleinevaluating theperformance ofprotection systems duringsystem faults andotherdisturbances. Theuseof relay models wouldenable ustoinvestigate therelays with closed-loop simulations andapproximate actual relays' characteristics sothattheir performance canbeevaluated foravariety ofoperation conditions. Thispaperdescribes a unified approach forcomputer-based simulation of microprocessor-based relays. Thesoftware relaymodel developed isadetailed digital model, whichclosely follows thehardwareandfirmware architecture ofthephysical relays. Themodelisemployed fortesting theperformance oftherelaywitha variety ofsimulation tests. Results obtained haveverified theeffectiveness ofthepresented methodandtherelay models.