The components of an ARES Energy Storage System may be deployed to create a robust Ancillary Services system which functions as a LESR (Limited Energy Storage Resource). These high-power short-duration energy storage systems are designed to provide grid-scale Regulation-Up, Regulation-Down, Spinning Reserves, VAR Support and Grid Inertia. The ARES Fast Response Ancillary Service technology bridges the power gap between large scale battery and flywheel installations and far larger pumped-storage hydro – at a lower life-cycle cost than batteries, a higher energy-to-power ratio than flywheels and a greater efficiency and far faster ramp-rate than pumped-storage hydro.
The ARES Ancillary Service facilities typically utilizes a single uphill track with a central queue of loaded shuttle-trains that travel up and down grade in response to an ISO (Independent System Operator) command to provide Reg-UP or Reg-Down frequency adjustment. In addition to its high charge / discharge efficiency of 80% they have an extremely fast ramp-rate on the order of seconds to ramp to full power.
ARES rail based energy storage systems are covered by one or more of the following US patents: 8593012, 8674541 with foreign patents pending and issued.
The expanding US western states market for energy storage is driven by the increased renewable portfolio standards, as well as the anticipated shutdown of heavy coastal generation facilities and a looming shortage of heavy inertia. There is an increasing need for large-scale, fast-responding storage facilities for ancillary services, renewables integration, load shaping, and transmission upgrade deferral.William Peitzke, ARES