Turbine-Powered Compression For Portland Xpress Project

Map courtesy of Portland Natural Gas Transmission System.

Portland Natural Gas Transmission System (PNGTS) has filed an application with the US Federal Energy Regulatory Commission (FERC) requesting the authority necessary to implement Phase III of its Portland XPress Project. The project will include the addition of one new 6300-hp (4699-kW) compressor unit at the existing Eliot Compressor Station located in York County, Maine, USA, and modifications to the infrastructure at the existing Westbrook Compressor Station and Dracut Metering and Regulating Station located in Cumberland County, Maine, and Middlesex County, Massachusetts, USA, respectively. Upon completion, the project will increase the certificated capacity on PNGTS’s wholly owned north system from Pittsburg, New Hampshire, to Westbrook, Maine, and increase PNGTS’s certificated capacity on the system it jointly owns with Maritimes & Northeast Pipeline from Westbrook, Maine, to Dracut, Massachusetts.

PNGTS seeks authorization for the following additions, modifications, and improvements to existing facilities:

  • Installation of one new compressor building at the existing, jointly-owned Eliot Compressor Station housing one new 6300 hp rated Solar Centaur-50 compressor unit and appurtenant facilities including new valves and piping for station reversal; additional gas cooling equipment with associated piping and valves; and updates to existing cathodic protection, AC mitigation, and fire protection systems. These new facilities will be located entirely within the existing area of the Eliot Compressor Station in Eliot, Maine.

 

  • Modifications and additions at the existing Westbrook Compressor Station including the installation of new station discharge gas cooling equipment with associated piping and valves installed southeast of the existing compressor building; installation of a new electrical control building housing a motor control center, station control panel, and control system; installation of a new emergency generator building installed northeast of the existing compressor building housing updated emergency generator; updating existing piping for full station reversal capability; and updating existing cathodic protection, AC mitigation, and fire protection systems.

 

  • Modifications and additions at the existing Dracut M & R Station including the addition of actuators to existing bidirectional valves 8, 10, 12; the addition of new low flow meter and transmitters, and replacement of ultrasonic meter assemblies; installation of a new; installation of a new communications building to house additional control and communication equipment; upgrading burner management systems to improve efficiency, and burner inspection ports to support maintenance activities; updating existing Tennessee Gas Pipeline flow control valves FC1, FC2, and FC3; replacing battery backup and existing legacy chromatograph equipment inside existing data acquisition building; and, updating existing cathodic protection, AC mitigation, and fire protection systems.