What are the energy storage devices for subway power supply

How much energy does New York City subway use?

In 2021, the New York City Transit Subway system consumed approximately 1,500 GWh of traction energy with a demand of about 3,500 megawatts (MW), costing around $203M. Subway trains introduced in the past 20 years have included the capability to perform regenerative braking. All new subway car procurements require regenerative braking capability.

How is energy storage used in energy recovery applications?

In energy recovery applications, energy storage is used to reduce energy consumption through the capture and release of regenerated energy from rolling stock. Typically, energy produced by the train during braking is consumed by other trains operating in the vicinity.

How many MWh of storage will a 78th Street substation have?

a total of 26 MWh of storage recharged overnight. Control would be based on power draw at each individual substation. Figure 11. Power Demand at the Roosevelt Avenue and 78th Street Substation During a Weekday Figure 11 shows demand at the Roosevelt Avenue and 78th St. substation, one of 13 substations serving the 7 Line.

How much power would a 7 line substation use a day?

Peak demand on the 7 Line is approximately 26 MW for 2 hours, twice per day. A 25% reduction in demand would require a total of 26 MWh of storage recharged overnight. Control would be based on power draw at each individual substation. Figure 11. Power Demand at the Roosevelt Avenue and 78th Street Substation During a Weekday

How much does ESS cost per substation?

Twenty-five percent (25%) demand reduction would result in $166,140 annual savings per substation. The maximum ESS cost to realize a 10-year ROI would be approximately $1,661,400 per substation (based on current demand power rate). Avoided Generation Capacity Costs (AGCC).

How much would a 25% reduction in peak demand save a substation?

A 25% reduction in peak demand power across the 7 Line would save 78000 kW of demand power and approximately $2,159,820 in demand charges annually. Twenty-five percent (25%) demand reduction would result in $166,140 annual savings per substation.