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Vapor Recovery Compressor

Problems

  • An existing vapor recovery compressor in a remote location would periodically shut down, causing a tank to over-pressure and vent hydrocarbon gases to the atmosphere.
  • Operators would then be dispatched to correct the problem, but they needed to drive 40 miles to get to the compressor station.

Solutions

  • A backup compressor was installed (by others).
  • A PLC was installed to automate both the primary and backup compressors with lead/lag control based on operator-defined setpoints.
  • A SCADA system was installed to bring critical compressor data from the remote location to the operator control room so the operators could monitor compressor status and schedule maintenance before breakdowns occurred.
  • Provided detailed electrical drawings including:
    • PLC drawings
    • Conduit Layout drawings
    • Motor control drawings

Results

  • More productive employees.
  • More reliable equipment.
  • Able to achieve environmental compliance.

Details

Client: Aera Energy Company
Location: Ventura, CA

PLCs:
  • (1) Allen Bradley SLC 5/04
  • 64 discrete, 4 analog
HMIs:
  • (1) SCADA node - Wonderware InTouch 7.11 (provided by others)
Remote Alarming:
  • Paging system (provided by others)
Data Historian:
  • Wonderware InSQL Server (provided by others)
Other Components Integrated through SCADA:
  • ABB TotalFlow - 6713 flow meter
  • YZ - NJEX 7300G chemical injection skid
  • Motorola - 202T modem
Networking, Protocols, and Drivers:
  • Data Highway Plus
  • DF1
  • Modbus RTU
  • RS-232
  • RS-485
  • RSLinx
  • WWRSLinx