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

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Regenesys Electricity Storage Technology
the applications listed require power and energy capabilities that are much smaller (e.g.,
customer-side PQ) or much larger (e.g., FACTS storage) than are likely to be offered by Innogy
for at least for the next several years. As a result of these consideration, not all the applications
listed above are to be considered in detail in this section. Instead, only those applications shown
in Table 1 will be subjected to detailed consideration. It again should be noted that Innogy
believes that Regenesys electricity storage plants can only be built so as to provide a sufficiently
high benefits to offset their costs if combinations of applications are included. Descriptions of
the applications to be considered in detail for Regenesys are given in the following sub-sections.
Transmission Deferral/Support 4
When growing demand for electricity approaches the capacity of a transmission system,
transmission providers (wires company) currently add new lines and transformers. Since load
grows gradually, new facilities are larger than necessary at the time of their installation, and
there is an under-utilization of the new transmission assets during the first several years of
operation. To defer the purchase of a new line and/or transformer, a wires company could
instead install a Regenesys energy storage plant close to the load center and discharge the energy
storage plant as necessary (e.g., shave peaks at the sub-station) to keep from overloading existing
transmission assets. The deferral can be made until the load warrants purchase of conventional
transmission upgrades.
4 Applications descriptions have been adapted from “Battery Energy Storage for Utility Applications: Phase I
Opportunities Analysis”, P. Butler, Report for DOE by Sandia National Labs, SAND94-2605, 1994
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