Protection technology of coal mine power based on GOOSE network with information sharing

Abstract

For problems of override trip in short-circuit fault and fault line selection in single-phase earth fault of coal mine power system, a protection technology of coal mine power based on GOOSE network with information sharing was proposed. The technology realizes anti-override trip with blocking signal and line selection in single-phase earth protection with zero sequence full current vector information based on GOOSE network. On the basis of existing gigabit industrial Ethernet of coal mine and high-speed real-time communication mechanism of GOOSE, fault information can be shared between protection devices, which can realize anti-override trip effectively and improve accuracy of fault line selection in single-phase earth fault.

Keywords

• coal mine power system
• override trip
• single-phase earth fault
• goose
• fault information sharing
• zero sequence full current power directio