Supervisory Control and Data Acquisition System, Gas Control, and Geographical Information System Supervisory Control and Data Acquisition (SCADA) is the use of computers and communications networks to gather field data from numerous remote locations, perform numerical analysis, and generate trends and summary reports. SCADA is employed for many different processes, such as management of electric power lines, operation of oil refineries, and operation of automobile assembly plants. SCADA systems make it possible to control a process that is distributed over a large area with a small group of people located in a single room. PG&E’s gas SCADA system monitors and controls 6,438 miles of transmission pipeline. SCADA reports are displayed in a structured format to enhance Gas Control Operators’ ability to monitor, forecast and send commands to field equipment. Some pipelines span long distances and are usually operated from a central location using a SCADA system. About 9,000 sensors and devices are installed along the length of the pipelines to enable the display of flow rates, equipment status, valve position status, pressure set points, and pressure control among other data. The current generation of SCADA used by PG&E is based on Citect software from Schneider Electric. PG&E’s pipelines are controlled and managed from the Primary Gas Control Center (Gas Control) located in San Francisco with an alternate (duplicate) control center located in Brentwood. Several compressor stations and local control stations, such as the Milpitas Terminal are situated along the pipelines, each with a separate local control system.
Supervisory Control and Data Acquisition System, Gas Control, and Geographical Information System Supervisory Control and Data Acquisition (SCADA) is the use of computers and communications networks to gather field data from numerous remote locations, perform numerical analysis, and generate trends and summary reports. SCADA is employed for many different processes, such as management of electric power lines, operation of oil refineries, and operation of automobile assembly plants. SCADA systems make it possible to control a process that is distributed over a large area with a small group of people located in a single room. PG&E’s gas SCADA system monitors and controls 6,438 miles of transmission pipeline. SCADA reports are displayed in a structured format to enhance Gas Control Operators’ ability to monitor, forecast and send commands to field equipment. Some pipelines span long distances and are usually operated from a central location using a SCADA system. About 9,000 sensors and devices are installed along the length of the pipelines to enable the display of flow rates, equipment status, valve position status, pressure set points, and pressure control among other data. The current generation of SCADA used by PG&E is based on Citect software from Schneider Electric. PG&E’s pipelines are controlled and managed from the Primary Gas Control Center (Gas Control) located in San Francisco with an alternate (duplicate) control center located in Brentwood. Several compressor stations and local control stations, such as the Milpitas Terminal are situated along the pipelines, each with a separate local control system.
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