New SCADA Design for Centralized Monitoring and Remote Operations for Seattle-Tacoma International Airport.

The Port of Seattle needed engineering services to help with the process of implementing a new Alternative Utility Facility (AUF) power generation facility for the Seattle-Tacoma International Airport. The new facility needed to be capable of closed transition power transfers and islanding from a local power grid.

How We Did It

Harris Group provided a new SCADA system which allows for centralized monitoring and remote operation of all medium-voltage substations, distribution center main and branch breakers and select low-voltage substations and distribution center main and tie breakers.

Harris Group provided all project management, architectural, electrical and communications design for this SCADA project. The Sea-Tac Airport Electrical distribution system included 2 medium voltage substations, 3 medium voltage switchgear lineups and 20 low voltage power centers. Full meter data historical reporting was provided to all Substations, Distribution Centers and Power Centers.

Harris Group created the system to include a development server to provide virtualized test and development environment to test patches and new configurations and additions prior to deploying on the SCADA runtime environment. Graphical User Interface (GUI) software runs on a fault tolerant virtual server platform and utilizes the Port’s existing Industrial Control System (ICS) local area network (LAN). The GUI provided real-time SCADA service for the Airport’s power distribution system. In addition, the system records events and meter data for historical reporting.

Harris Group created the system to inlcude a development server to provide virtualized test.

The SCADA system was built on Programmable Logic Controllers (PLC’s) installed at each of the Substations, Distribution Centers and Power Centers 

The SCADA system now interfaces each facility via a SCADA interface cabinet. SCADA control features include open and close capabilities at all breakers a requirement for transfer of power between sources. Indication features included Open, Close, Trip and out of Service for “all” breaker positions.

Real-time and historic meter data was required for the complete Power Distribution system, including Substations, Distribution Centers, Power Centers and the Alternate Utility Facility. 

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