MAkINg ThE DIFFERENCE Rail iNdUSTRy
SEPTA breaks into new trackside storage market
US transport authority SePTA ( S o u t h e a s t e r n P e n n s y l v a n i a TransportationAuthority)isdemonstrating how rail operators can plugintoanewrevenuestreamand improvetheirenvironmentalperformance.in2016,itmadeitsthirdforay intocapturingthebrakingenergyfrom subwaycarsandstoringitusingSaft energystoragesystems. Under braking, a six-car metro train can generate up to 3 MW. By capturing this energy (which would otherwisebelost)inastoragedevice, itcanbeusedeithertopoweraccelerationoftrainsortohelptheoperatoroftheelectricitydistributiongrid balancesupplyanddemand. SePTA’s energy storage journey startedin2011whenitusedagovernment grant to fund a pilot project adjacenttothetracksonitsMarketFrankfordline.Thetrialindicatedthat SePTA could reduce its energy bill by$135,000persubstation.Asecond pilotwasthencommissionedin2014 toevaluateamixofbatteryandsupercapacitorenergystorage,takingthe totalpowercapacityto1.8MW. Thelatestprojectisthefirsttobe operatedonacommercialbasisand requirednoupfrontinvestmentfrom SePTA.Undera20-yearagreement, Constellation, a leading competitive
In 2016 Saft provided 8.7 MW of battery capability for SEPTA subway line.
energycompany,willfund,ownand operate lithium-ion (Li-ion) battery systemsthatadd8.7MWpower. in turn, demand response and managementspecialistViridityenergy willprovidethecommercialinterface with the energy market through its software. “SEPTA is undertaking a unique combination of regenerative braking
capture and reuse, coupled with revenuegenerating, market-based services. Indeed, the value is so compelling that the project has expanded from a single battery installation to a fleet of nine batteries that will be operational in the coming months,” highlights Viridity President,RajChudgar. firstname.lastname@example.org