Multi-criteria Protection Technology Based on GOOSE in No Process Level Network

The state grid corporation proposes that power grid with the 35kV and lower voltage level should apply two layers network structure with no process level network when building smart substations, so a lot of applications based on process layer sharing information cant be achieved. In order to realize multi-criteria relay protection technology for smart substation, GOOSE network is proposed to realize information sharing mode, based on which switch and analog signal are transmit. Therefore, information sharing is realized, multi-criteria relay technology based on GOOSE network is built, the GOOSE message is analyzed thoroughly, and reliable methods to distinct GOOSE messages in different devices are put forward finally. By Combining the GOOSE network transmission mechanism, the schemes of busbar protection and single-phase grounding protection are mainly studied. And the improved implementation plan of the traditional protection is proposed, which effectively solve the hard problem of realizing multi-criteria relay protection technology in no process level network and promote the application of IEC61850 standards in the power distribution.