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Chapter: Power System Operation and Control - Reactive Power -Voltage Control

Dynamic Response of Voltage Regulation Control

The response depends upon the roots of the characteristic eqn. 1 + G(S) = o.

DYNAMIC RESPONSE OF VOLTAGE REGULATION CONTROL

 

Consider


The response depends upon the roots of the characteristic eqn. 1 + G(S) = o.

 

As there are three time constants, we may write the three roots as S1, S2 and S3. A typical root locus plot is shown in Figure



Root locus

From the plot, it can be observed that at gain higher than Kc the control loop becomes ln stable.


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