Technology of Digital Substation for Advanced Maintenance and Operation

摘要

The aged substation facilities in Japanese electric power industry has created the growing need to replace many of them. When replacing substation facilities, it is required to improve construction work efficiency, save costs, increase equipment reliability, and enhance maintenance and operation. To meet these needs, Fuji Electric developed IEDs and MUs in accordance with IEC 61850, an international standard that stipulates the configuration of digitalized substations. Connecting IEDs and MUs via Ethernet, we have been developing an IEC 61850 fully digitalized substation by using oversampling techniques and examining protection performance (3-cycle breaking).