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Recycling Energy: "operating Reserves"

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Grid "Operating Reserves," are essentially plant capacity used,
. . . to accommodate short-term fluctuations.
It's about extra power generated, that's constantly wasted and seldom ever used.

Just because, sometimes, a bit of power is quickly needed to stabilize grid frequency;
. . . . . . this power is needed within a second.
. . . At other times, power is needed within a minute.

New batteries, appear to be cheaper,
. . . provide more grid stability than conventional plants,
. . . react within a fraction of a second, and
. . . doesn't waste energy.

The system is a real-world example of the kind of battery storage,
. . . described in a recent study for 100% renewable power.

09-19-2014 Source:  "Operating Reserves"

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