TTS helps commission two Texas compressor stations

Category: Company News, Midstream

On-Time Commissioning Helps Plant Meet Growing Energy Demands in Mexico


TTS was asked to provide equipment and services for a major gas company in the process of building two large compressor stations near the Texas-Mexico border.  The projects were unique due to the amount of horsepower being installed. The end user of the gas being pumped through the line was the Mexico utility.  TTS completed the project on time and helped the client commission the plants ahead of schedule.

A Quarter Million HP to Manage & Control at the TX-MX Border

In 2016, a Texas pipeline company received a 168 mile (270 km) intrastate gas pipeline project from Mexico’s state-owned utility serving 37 million customers. Through the project, natural gas transportation services, set for operation in 2018, would help meet Mexico’s growing electric generation needs.

The planned facilities included 168 miles (270 km) of intrastate pipeline; a nearly 170,000 hp (126,769 kW) compressor station located outside of Corpus Christi, Texas; and a nearly 100,000 hp (74,570 kW) compressor station located outside of Brownsville, Texas.

With that scope in mind, TTS received a contract for building and commissioning the pipeline station’s control and emergency shutdown panels.

Pipeline from Texas-Mexico Border
Pipeline from Texas-Mexico Border

TTS Services and Solutions

For the last 35 years, TTS has been serving the power and energy industry with innovative and reliable engineering expertise.  The company has managed gas turbine installations, modernization projects and high-value engineering solutions for clients across the globe.

For the pipeline project, the team at TTS combined automation and controls experience and gas compressor station design expertise to achieve lower overall plant operating costs, increase flexibility and availability while reducing risk.  The scope of the project included the following control panel and automation upgrades and field services from TTS:

  • Network Topology: The SCPs and ESDs utilized the Ethernet-based Device Level Ring architecture for the processor I/O connections. This architecture, a combination of copper and fiber, is based on the Converged Plant wide Ethernet (CPwE) with Device Level Ring (DLR) architecture specified by Rockwell Automation. Each panel has two 1783-ETAP1F embedded switches for the Device Level Ring (DLR) over fiber between the panels. The SCP master panel has two Stratix 5700 managed Ethernet switches.
  • Power Supplies: Power supplies were configured in an N+1 configuration utilizing a redundancy module on the output of the power supplies. The first redundant power supply is fed from the 120VAC utility power and power supply fed from the 120VAC utility power and the second is fed from the UPS-supplied 120VAC inverter panel. Each power supply is sized to operate on its own with a 30% margin for the panel 24VDC devices and field I/O.
  • Inputs and Outputs (I/O): I/O modules were allocated to provide at least 20% spare. Each digital output was wired to a 24VDC interposing relay. Each digital input was wired to a 3-level terminal block with fuse and ground terminal. Each analog input card was wired for single-ended current input, and each input wired to a 3-level terminal block with fuse and ground terminal. Each analog output card was wired for current output and a 3-level terminal block with a ground terminal. Wiring from I/O cards utilizes Allen-Bradley factory cables with pre-wired card fronts.
  • Enclosures: Control panels for the SCP and ESP panels are NEMA Type 12 enclosures with top entry. Outdoor remote I/O panels were specified as NEMA type 4X and configured for bottom entry.
  • Chassis Configuration: Each chassis was sized for at least 10% spare card allocation.
  • Software: TTS provided programming based on the provided documentation, such as P&ID diagrams, cause and effect matrices, system descriptions and control philosophies. The software version of Studio5000 was specified by the operator and compatible with ControlLogix redundancy firmware. The software program is open and configurable by the pipeline company. TTS provided one copy of Logix Designer software, 9324-RLD700NXENM (Studio5000 Professional).

A Trusted Resource for On-time Execution

With the help of TTS, the plant in Mexico was able to commission services on-time and ahead of schedule.  The upgrades brought greater stability and reliability to the gas transportation pipeline.  Thus, the plant could begin to respond to the rising demand for energy in Mexico while providing revenue to the plant.

“TTS engineers and technicians logged over 15,000 man-hours in engineering, programming, fabrication, installation and commissioning to get this project completed for the customer,” said Dave Simmons, TTS’ director of engineering.

For more information on this project, read the full article from Compressor Tech 2 here.