The Study Of Hybrid Modeling And Simulation To Digital Relay Protection

At present, most of power systems'simulation tools have not the systematic model of relay protection system and can not reflect the control rules of relay protection system truly and completely. Using hybrid system theory that considers both continuous events and discrete events'dynamic character synthetically, the paper establishes the hybrid model library using modeling methods of GHPN net. All kinds of digital protection models can be established using element models in the hybrid model library. Digital simulation results denote that the relay protection model is feasible on the software flat named Dymola. It reflected clearly the inside dynamic behavior of the digital protection models.