No Load Application

• Start the Certification application

• Undock the panel at left (),
• Click on Certify_2 button (the panel title bar will display Certify_2)
• Increase the speed (click once on Increase speed button)

• Return to Certify_1 and click on the Graphic 1 tab
• Check the graphs to verify No Load operation stability
• The curves should stabilize in a few seconds after several oscillations.

Synchronous Network Operation

• Wait until speed stabilizes
• Switch to synchronous mode using the Operating Mode button at the far right of the graphs
• Change the Increase_servos set point. Click and hold the button for 15 seconds to increase the servomotors by 0.5
• In the Generic PID Speed Governor panel, increase the PID’s maximum limit to 1000 (Figure 67)
• Increase the gain integrator’s maximum value (Gi max) to 1000
• Increase the permanent droop (Bp) to 0.050
• Return to Certify_1 and view the results in Graphic 1, 2 and 3 panels
• The servomotors command must reach the BERTA reference “dxref berta”
• The speed does not change (Graphic 3 panel),
• Increase the Increase_servos set point again. Click and hold the button for 9 seconds to increase the servomotors by 0.3 (target set point: 0.8)
• View the new results in the Certify_1 graphic panels.

Islanded Operation

Once the synchronous operation is stabilized, switch to Islanded operation.

• The servomotors command increases
• The reference does not change
• The frequency varies
• Gradually decrease the dPO to zero p.u.,
• The servomotors command is nearing the reference
• The speed stabilizes at 1.0
• The frequency is stable