Power System stability and control course, Homework module 4 1. Open Power World Simulator case Problem 12_3. This case models the system from Example 1 in slides of lecture 5prime except with the rate feedback gain constant, Kf, 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, Ka, becomes too large. In the simulation this instability will be indicated by undamped oscillations in the terminal voltage (because of the limits on Vr the response does not grow to infinity but rather bounces between the limits). Using transient stability simulations, iteratively determine the approximate value of Ka at which the system becomes unstable. The value of Ka can be on the Generator Information Dialog, Stability, Exciters page. Case Problem 12_3.PWB Status: Initialized Simulator 19 GSO - File Case Information Draw Onelines Tools Options 07 # Edit Mode L10 Network - Aggregation - Solution Details Add Ons Window 09 Case Description... Power Hinw list... AX Em Case Summary... Quick Power Flow List... Difference Simulator Flows Options... Custom Case Info... AUX Export Format Desc... Case Data Area/Zone Filters... Monitoring... Case information Run Mode Model Explorer.. Mode Problem 123 Open Windows View... Substation Oneline View... Viewer Views X Transient Stability Data Not Transferred Bus 2 X12 = 0.20 Bus 1 Bus 4 XTR = 0.10 Infinite Bus slack Bus 3 X23 = 0.20 1.0946 pu X13 = 0.10 Delta (Deg): Speed (Hz): P: 100.00 MW Angle = 6.59 Deg Eqp: Edp: Efd: Vr: Angle = 0.00 Deg Run Mode Solution Animation Stopped JAG Viewing Current Case Type here to search O A $72 4X ENG 12:47 AM 3/1/2021 Power System stability and control course, Homework module 4 1. Open Power World Simulator case Problem 12_3. This case models the system from Example 1 in slides of lecture 5prime except with the rate feedback gain constant, Kf, 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, Ka, becomes too large. In the simulation this instability will be indicated by undamped oscillations in the terminal voltage (because of the limits on Vr the response does not grow to infinity but rather bounces between the limits). Using transient stability simulations, iteratively determine the approximate value of Ka at which the system becomes unstable. The value of Ka can be on the Generator Information Dialog, Stability, Exciters page. Case Problem 12_3.PWB Status: Initialized Simulator 19 GSO - File Case Information Draw Onelines Tools Options 07 # Edit Mode L10 Network - Aggregation - Solution Details Add Ons Window 09 Case Description... Power Hinw list... AX Em Case Summary... Quick Power Flow List... Difference Simulator Flows Options... Custom Case Info... AUX Export Format Desc... Case Data Area/Zone Filters... Monitoring... Case information Run Mode Model Explorer.. Mode Problem 123 Open Windows View... Substation Oneline View... Viewer Views X Transient Stability Data Not Transferred Bus 2 X12 = 0.20 Bus 1 Bus 4 XTR = 0.10 Infinite Bus slack Bus 3 X23 = 0.20 1.0946 pu X13 = 0.10 Delta (Deg): Speed (Hz): P: 100.00 MW Angle = 6.59 Deg Eqp: Edp: Efd: Vr: Angle = 0.00 Deg Run Mode Solution Animation Stopped JAG Viewing Current Case Type here to search O A $72 4X ENG 12:47 AM 3/1/2021