7.2 PROPORTIONAL PLUS INTEGRAL CONTROLLER
The block diagram of an uncontrolled single-area system with an integral controller, is shown in Fig 7.1
The integral controller gives signal to the speed changer ie ∆Pc. Hence we can write
Fig 7.1 Block diagram of a proportional plus integral controller
Taking Laplace transformation
The negative sign indicates that for a positive frequency error, the speed changer signal should be decreased and ...
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