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

EPRI Proprietary Licensed Material
Regenesys Electricity Storage Technology
any given installation for small incremental cost. (See next section for a further discussion of
cost factors.) Of course, using a Regenesys energy storage plant for multiple applications
implies a capability to be able to dispatch the plant to an alternative or additional application
when called upon to do so.
It must be clear from the information presented previously in this chapter that Regenesys energy
storage systems are best suited to applications that utilize diurnal energy storage or the like, e.g.,
load leveling. With an appropriately sized converter, however, a Regenesys plant could also be
available for much of the time for short discharge time applications. Thus, while being used for
diurnal energy storage that typifies long discharge time applications such as load leveling, the
Regenesys plant could also be used to help mitigate system instability or to improve power
reliability for customers for whom this can be an economic benefit and thus a marketable
commodity.
Innogy and others have proposed a long list of potential applications for systems that can
accommodate both short and long discharge times, including:
o Load Leveling
o Energy Arbitrage
o Transmission Deferral/Support, supply-side Peak Shaving
o Provision of ancillary services such as area/frequency regulation, spinning reserve,
and black start
o Maximization of generation assets profitability by providing ramping, load following,
dispatch for emissions minimization
o System Stability and FACTS Storage
o Minimization of impacts of T&D disturbances on power reliability
o Power quality for industrial (transmission) customers provided from the supply side
of the meter
o Peak shaving on the customer side of the meter
o Power quality for commercial customers provided on their side of the meter
Many of these potential applications for energy storage provide no benefit to the T&D system,
for which this Handbook is intended. However, while not directly benefiting the T&D system,
some of these applications can be readily served as additional functions by storage plants
installed for T&D benefit (e.g., ancillary services such as area/frequency regulation). Some of
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