Open PowerWorld Simulator case _3. This case models the
Chapter , Problem 12.3(choose chapter or problem)
Open PowerWorld Simulator case Problem 12_3. This case models the system from Example 12.1 except with the rate feedback gain constant, \(K_f\), has been set to zero and the simulation end time was increased to 30 seconds. Without rate feedback the system voltage response will become unstable if the amplifier gain, \(K_a\), becomes too large. In the simulation this instability will be indicated by undamped oscillations in the terminal voltage (because of the limits on \(V_r\) the response does not grow to infinity but rather bounces between the limits). Using transient stability simulations, iteratively determine the approximate value of \(K_a\) at which the system becomes unstable. The value of \(K_a\) can be on the Generator Information Dialog, Stability, Exciters page.
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