PsyCor International, Inc. recently installed the web-enabled Real-Time Security Data Display that is accessed via the North American Electric Reliability Council’s (NERC) Security Coordinator Information System website. The work was done for EPRI who then posted the facility on NERC’s website for electric utility Security Coordinators to visually monitor system security. The site displays power flows over specific transmission paths (flow gates) that indicate the system status. The RSDD also displays real-time bus voltages on critical buses in the grid. The site has been designed to display up to 50 flow gates and 300 bus voltages, although it has significantly more capacity. Up to 200 users may access the site simultaneously.
"Our use of SISCO’s AX-S4 ICCP product, and most importantly SISCO’s support, helped make this project happen on schedule."
PsyCor used their ODMS Viewer/Editor software package to produce images used by the website. This software provides a viewport into the data contained in an underlying Common Information Model (CIM) schema. For the RSDD, the ODMS Viewer/Editor obtains the real-time data from SISCO’s AX-S4 ICCP for the points defined in the CIM database and displays it on various backgrounds. The backgrounds for the RSDD system include a transmission line map of North America, or a simple North America map illustrating the various reliability regions of the USA. The AX-S4 ICCP software feeds the data to the CIM database for use by the ODMS Viewer/Editor.
The diagram below provides an overview of the activities performed in the RSDD site. SISCO’s AX-S4 ICCP provides the interface from the ODMS Viewer/Editor to both the ISN and the NERC ICCP node. The system is laid out in a fashion to provide for the NERC firewall to provide the needed security without duplication.
Topology of the RSDD System - Numbers Correlate Action Order for Data Push to ODMS Viewer/Editor and for a User Data Request
Flowgate flows and bus voltage points are obtained from the ISN directly, and some data, such as the Transmission Loading Relief, is obtained from another page in the NERC website. These sources bring their data into the CIM database such that the ODMS Viewer/Editor sees all data in one contiguous model for display.
ODMS Viewer/Editor determines where the information should be displayed on the screen relative to the geographic background. Also, based on predetermined limits, ODMS Viewer/Editor displays the information in various colors to indicate normal, caution, or out of limits operation for each data element displayed.
This project began in April 2000 and was delivered in June. To meet this ambitious schedule required close cooperation by all contracting parties. SISCO provided support not only in their delivery and installation of AX-S4 ICCP, but they also provided valuable on-site assistance through their New Jersey office location being minutes away from the NERC facilities in Princeton, NJ.
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