6 Effect of power imbalance on system frequency

The new frequency is calculated as follows 2 2 1 2 1

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The new frequency is calculated as follows. ( ) ( ) ( ) ( ) 2 2 1 2 1 0 2 60 2 e m e k t I t k I ω π = = Assuming ω m = ω , since m ω ω then, ( ) ( ) ( ) ( ) ( ) ( ) 2 2 2 0 2 60 200 2 60 300 e e k t t k t ω π π ω = = Therefore ( ) 60 2/3 48.98 f t = = . This change is not permissible since it is too big. The power consumed has to be generated instantaneously. There are ways of storing energy in small scale, e.g. in batteries, or even in large scale, e.g. dams, but the latter cannot be built everywhere. Hence a way to store energy is in rotating masses. Power systems are provided with primary frequency regulation. Basically this is a closed loop control signal related to the frequency deviation from the normal standard frequency.
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