SCADA System


Bath Engineering teamed with Webb Electric for this design/build project in Pensacola, Florida.  The scope of work called for designing, furnishing, installing, integrating, testing and commissioning a Supervisory Control and Data Acquisition (SCADA) for Pensacola Naval Air Station and associated facilities at Saufley Field and Corry Station.

The new SCADA system, which replaced the existing master station computer system, remote terminal units, and communication system, provided expanded monitoring and control capabilities for 39 wastewater lift stations, 13 water wells, 2 water reservoirs, 8 elevated water towers and 14 electric substations.

Bath provided value engineering for the replacement of inaccurate analog metering devices in 15kV substations with modern intelligent electronic devices.  This dramatically improved the accuracy and quality of data being received at the master station.

The master station consisted of computers, peripherals, local area networks, graphic displays, software and associated equipment to provide application, data processing, archiving, and the human-machine interface functions.  The master station had a dual-server redundant configuration with two local operator stations, one programmer’s station, and one remote operator station.  The master station included a wide area network consisting of a wireless Ethernet link between the primary master station at Pensacola Naval Air Station and the remote operator workstation at Corry Station.  The wireless Ethernet wide area network was based on unlicensed technology in the 902-928 MHz unlicensed spread spectrum.  A repeater was located on the top (elevator penthouse area) of the Navy hospital to provide a line-of-sight path between the two endpoints at Pensacola Naval Air Station and Corry Station.  60-foot antenna towers were installed at both end points.  A radio path analysis was performed to verify locations and antenna heights.

The remote terminal unit communications subsystem included three ultrahigh frequency repeaters, control station radios, remote terminal unit radios, antenna systems, and associated equipment to provide reliable asynchronous transmission of data between the master station and remote terminal units.  All remote terminal unit communication ports used DNP 3.0 protocols for master-to- remote terminal unit communication.  All radios operated in the UHF 406 to 420 MHz frequency band.  Radio channel spacing was 12.5 kHz.