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

EPRI Proprietary Licensed Material
Regenesys Electricity Storage Technology
Table 1
T&D Applications Chosen for Detailed Analysis for Regenesys Technology
(See notes after table)
Application
1. Transmission
Deferral/Support
2. Area or
Frequency
Regulation
Size
MW
Duration
Hours
Plant
MWh
Response
Time
Duty
Cycle
10 10 100 Seconds 20-200
per year
10 0.25 N/A 100 ms Continuous
in daytime
Roundtrip
Efficiency
Plant
Footprint
60-65% 2.5 acres
60-65% N/A
3. Transmission
Customer PQ
10 1-2 N/A 100 ms 6 per year 60-65% N/A
Notes for Table 1:
a. T&D Deferral/Support, with Peak Shaving is regarded as the primary application of a
Regenesys ES plant and as such sizes the reference plant 100MWh/10MW.
b. Provision of Area Regulation and Spinning Reserve is regarded as a secondary
application for a Regenesys plant installed to meet the requirements of the primary
application.
c. Power Quality, or improved reliability, for sub-transmission customers, is regarded as an
alternative or additional secondary application for a Regenesys plant installed primarily
for the T&D Deferral/Support, with Peak Shaving, application .
In the transmission deferral/support application, the Regenesys battery would be dispatched from
20 to 200 times per year, depending on how close to the limits of the line or transformer the
system is being operated, and the local load requirements. When dispatched, the Regenesys
plant could be discharged for up to ten hours, since there are times when the peaks on
transmission facilities last for this long. Use of the Regenesys plant in this way could also
potentially increase network efficiency.
The transmission deferral/support use could be particularly attractive for Regenesys application
because of the low costs ($/kWh – see Cost section) for energy capacity and because of the long
expected life for the system.
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