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

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Regenesys Electricity Storage Technology
discount rate of 7% and 20-yr life. As discussed above, Area Regulation and Spinning Reserve
is an additional one time benefit, that offsets the cost of the Regenesys plant, and thereby
increase the benefit/cost ratios. Only the lower value for the estimated cost offset shown in
Table 4 is used for the Benefit/Cost ratio calculations, since the higher value is believed only
pertinent to island systems such as Puerto Rico, rather than transmission systems in the 48
contiguous states. Power Quality (reliability) is an alternative or additional secondary benefit,
the Net Present Value of which is factored in using a discount rate of 7% and 20-yr life. In Table
5, FOAK refers to the first of kind commercial plant, and NOAK refers to the n th of kind plant,
as defined for Table 3, above.
Table 5
Benefit Cost Ratios for 10 MW/100 MWh Regenesys units in T&D Applications
Application
T&D Deferral/
Peak Shaving
T&D Deferral +
Area Regulation
Spinning Reserve
T&D Deferral +
Transmission PQ
T&D Deferral +
Area Regulation
Spinning Reserve
+ Xmission PQ
FOAK
Cost, $
NOAK
Cost, $
Low NPV
Benefits, $
High NPV
Benefits, $
BC Ratio,
FOAK
BC Ratio,
NOAK
15 x 10 6 8 x 10 6 5.30 x 10 6 15.9 x 10 6 .35 - 1.06 .66 - 1.99
8 x 10 6 1 x 10 6 5.30 x 10 6 15.9 x 10 6 0.66 – 1.98 5.3 – 15.9
15 x 10 6 8 x 10 6 10.6 x 10 6 42.4 x 10 6 0.71 - 2.82 1.32 - 5.30
8 x 10 6 1 x 10 6 10.6 x 10 6 42.4 x 10 6 1.32 - 5.3 10.6 - 42.4
References and Bibliography
Seminal Papers
“A novel approach to utility scale energy storage” by Price A, Bartley S, Male S, and Cooley G,
IEE Power Engineering Journal, June 1999.
“The Regenesys Energy Storage System” by Anthony Price, Power generation by
Renewables, Professional Engineering Publishing Limited (2000) 331 pp. ISBN 1 86058 309 1,
Institution of Mechanical Engineers, December 1999.
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