PacifiCorp
250kW x 8hr VRB-ESS; peak shaving application
The VRB-ESS installation for PacifiCorp in Castle Valley, Utah, achieved substantial completion on February 23, 2004 and is the first large-scale commercial VRB-ESS in North America. The 250kW X 8 hour (2 MWh) unit which is connected to an 209 mile 25kV rural feeder, is being used as a load leveling (peak shaving) device to supply peak power capacity to a remote location in southeast Utah. The VRB-ESS will enable PacifiCorp to assure the energy supply, while deferring the need for a new sub-station. The system includes innovative control interface applications and is to provide considerable impact on local voltage and power factor control. The installation site is in an environmentally sensitive area of national parks in southern Utah, and the VRB-ESS is unobtrusive and flexible.
