Current distribution management systems in Japan

This paper presents current distribution management systems (DMSs) in Japan. Distribution management systems have been installed in control centers in order to improve distribution system reliability and effective operation of distribution equipment. Computer systems of DMS moves from concentrated computer systems (CCSs) to distributed computer systems (DCSs) because DCSs have advantages of stable operation by divided functions to computers and easy connections to information systems. This paper presents backgrounds of introduction of DCSs to DMS, software environments, introduction examples, and futures of DMS.