Yoshio Ebata

Development of the Intranet-based SCADA (supervisory control and data acquisition system) for power system

This paper proposes to apply the Intranet technology to SCADA (supervisory control and data acquisition system) for power system and presents the result of development of the Intranet-based SCADA trial system. The Intranet-based SCADA is concerned with real-time performance and reliability of supervisory control. How the trial system resolved these issues is discussed and various measurements at the trial system including picture display time, supervisory control response time and failover time are presented. Real time performance, system cost and maintainability of the Intranet-based SCADA are evaluated based upon the trial system. The feature of the Intranet-based SCADA such as failover between geographically separated servers and capability of supervisory control at night from another control center are discussed. Information security of the Intranet-based SCADA that should be paid particular attention to is also discussed.

Development of battery aggregation technology for smart grid

With the increasing implementation of Renewable Energy (RE) sources to the power grid, in the near future power grid will face problems such as power quality disturbances, lack of balancing capability for grid operation, and such. To face this challenge, creation of a Virtual Power Plant (VPP) by an aggregation of various Distributed Energy Resource (DER) are often reported and discussed as a solution. However, VPP created by battery aggregation is seldom discussed. This paper discusses the method and result of demonstrating VPP by battery aggregation and application to Load Frequency Control (LFC), Peak Shift (PS), and Reserve Margin (RM) functions.