Rapidly increasing application of Intranet technologies for SCADA (supervisory control and data acquisition system)

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The adoption of Internet and Intranet technologies has been rapidly spreading and existing systems are being replaced with new systems based on these new technologies. At changing environment of the power system industry, in 1999 Toshiba announced a concept of new middleware for power system network control systems including energy management systems (EMS), supervisory control and data acquisition systems (SCADA), and distribution management systems (DMS). This new middleware is based on latest Internet and Intranet technologies, offering the real-time operation and high reliability required for network control systems. Several systems are being manufactured, and some of which are already at the stage of commissioning tests. This paper focuses on a SCADA system for the ultra high voltage equipment pilot plant of Tokyo Electric Power Corp. (TEPCO) which has been working since December 2000, and uses Intranet technologies, with an emphasis on a functional overview and the features of the newly developed system.

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