NV Energy Electricity Storage Valuation

Ellison, James F. ; Bhatnagar, Dhruv ; Samaan, Nader A. ; Jin, Chunlian

关键词: electrical energy storage;    storage valuation;    operating reserve;    and variable generation;   

DOI  :  10.2172/1107491
RP-ID  :  PNNL-22546
PID  :  OSTI ID: 1107491
Others  :  Other: TE1400000

美国|英语

来源: SciTech Connect

【 摘 要 】

This study examines how grid-level electricity storage may benet the operations of NV Energy in 2020, and assesses whether those benets justify the cost of the storage system. In order to determine how grid-level storage might impact NV Energy, an hourly production cost model of the Nevada Balancing Authority (\BA") as projected for 2020 was built and used for the study. Storage facilities were found to add value primarily by providing reserve. Value provided by the provision of time-of-day shifting was found to be limited. If regulating reserve from storage is valued the same as that from slower ramp rate resources, then it appears that a reciprocating engine generator could provide additional capacity at a lower cost than a pumped storage hydro plant or large storage capacity battery system. In addition, a 25-MW battery storage facility would need to cost $650/kW or less in order to produce a positive Net Present Value (NPV). However, if regulating reserve provided by storage is considered to be more useful to the grid than that from slower ramp rate resources, then a grid-level storage facility may have a positive NPV even at today's storage system capital costs. The value of having storage provide services beyond reserve and time-of-day shifting was not assessed in this study, and was therefore not included in storage cost-benefit calculations.