The Sitras SES system uses supercapacitors to store train braking energy and reuse it to save energy or stabilize voltage during peak times, Siemens said Monday.
TriMet’s southeast Tacoma substation will house the storage unit and TriMet intends to use it as a voltage stabilizer to avoid mass transit disruptions.
“With over 35 light rail systems operating in the U.S. and another 13 systems being built, light rail is an increasingly important method of transportation for growing cities and the need to make this travel as efficient and cost-effective as possible is paramount,” said Thierry Godart, president of Siemens’s North American smart grid business.
Sitras is part of Siemens’ portfolio of rail electrification systems, designed to connect rail infrastructure to power grids.
Siemens’ rail systems business is producing 18 rail vehicles for the line extension project and its mobility and logistics unit will deploy signaling and communication technologies on the new line.
The extended line is scheduled to begin operating in 2015 and will expand the MAX light rail service to 97 stations.