Handbook of Energy Storage for Transmission or ... - W2agz.com

EPRI Proprietary Licensed Material
Regenesys Electricity Storage Technology
Table 4
Estimated Benefits for Electricity Storage Applications (2002$)
(See notes for table)
Low Estimate Low Ref High Estimate Hi Ref
Peak Shaving/T&D Deferral, Note a $50/kW/year 1 $150/kW/year 2
Area Regulation/Spinning Reserve, Note b $700/kW 3 $1500/KW 4
Power Quality (reliability), Note c $50/kW/yr 5 $250/KW/yr 6
Notes for Table 4:
a. Peak Shaving combined with Deferral of T&D is regarded as the primary benefit of a
Regenesys ES plant. This application sizes the reference plant with a capacity of 10MW
and a storage capability of 100MWh during a 10-hour discharge
b. Provision of Area Regulation and Spinning Reserve is regarded as a secondary and
additional benefit for a Regenesys plant installed to meet the requirements of the primary
application. In order to estimate the value of this secondary application, Area Regulation
and Spinning Reserve is assumed to be provide a one-time benefit, at the time of
installation, that can offset the cost of the Regenesys ES plant.
c. Power Quality, or improved reliability, for sub-transmission customers, is regarded as an
alternative or additional secondary application. Thus, Power Quality (reliability) benefits
will always assumed to be additive to the Peak Saving/T&D Deferral benefit, but may be
additive to or an alternative to Area Regulation/Spinning Reserve benefits.
References for Table 4: Estimated Benefits
1. EPRI Energy Storage Workshop materials, Hurwitch et al, c.1991, adjusted for inflation
and updated
2. Cost of Puerto Rico BESS, as a proxy for the value of this function, adjusted for inflation
3. Bert Louks, EPRI Journal 1988, based on Dynastor projections, adjusted for inflation and
updated
4. H. Zaininger, SAND98-1904 (SMUD Wind and PV study)
5. S. Schoenung, “Superconducting Magnetic Energy Storage Benefits Assessment for
Niagara Mohawk Power Corporation,” report prepared for Oak Ridge National
Laboratory, DE-AC05-840R21400, 1994.
6. Projection by P. Symons of Symons/EECI for private-sector client
-------------------------------------------------------------------------------------
Table 5 shows Benefit/Cost Ratios based on the benefits listed in Table 4 and specific system
costs listed in Table 2. Note that T&D Deferral/Peak Shaving is the primary application. The
Net Present Value for the T&D Deferral benefit shown in Table 5 was calculated using a
Page 22