Development of an integrated Condition Monitoring and Diagnosis system (IEC61850) for cubicle-GIS

This paper describes an integrated CMD (Condition Monitoring & Diagnosis) system based on CBM (Condition Based Maintenance) for CGIS (Cubicle Gas Insulated Switchgear) to inspect the failure possibility of the electrical and mechanical components of CGIS in advance. The smart method monitors and diagnoses the condition of CGIS using UHF (Ultra High Frequency) antenna for partial discharge (moving particles, electrode protrusions, floating electrodes, void in solid insulation etc.), pressure sensor for leakage and burst out of tank, and coil current, and stroke sensor for VI (Vacuum Interrupter) trouble (contact abrasion, coil aging, motor dam-age, disoperation etc.). The proposed method can communicate with the smart grid in IEC61850 protocol. The logical nodes for condition monitoring and diagnosis of CGIS are shown. The intelligent monitoring and diagnosis method can prevent the failures of CGIS carrying the enormous blackout as well as the unnecessary displacement of the sound CGIS without damage.