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Command switches | Associated function | |||||
|  | Default status, no action. | ||||
 | PSS is activated until the system is stabilized. | |||||
| | The generator has no rotor damper windings. | ||||
| The generator has rotor damper windings to damp torque oscillations | |||||
| | Default status, no action. | ||||
| Fault is triggered on bus 1. | |||||
| | Default status, no action. | ||||
| Fault is triggered on bus 3. | |||||
| | Default status, no action. | ||||
| Switches are closed: the line between buses 1 and 3, and between buses 3 and 2 are reconnected. | |||||
| | The trigger function is inactive. Signals are not synchronized with respect to a reference signal. | ||||
| Signals are synchronized with the oscillations' frequency of the system. | |||||
| | The trigger function is inactive. | ||||
| The oscilloscopes are waiting for a fault initiation to display the signal waveforms for 6 seconds. | |||||
Table 3: Control switch descriptions
| Anchor | ||||
|---|---|---|---|---|
|
Control Indicators | Description | |
D1 |  | Switch closed (line connected) |
| Switch open (line disconnected) | |
D2 |  | Switch closed (line connected) |
| Switch open (line disconnected) | |
Damping |  | The generator is equipped with rotor damper windings |
 | The generator is not equipped with rotor damper windings. | |
Oscillating |  | The system is oscillating. |
 | The system is not oscillating. | |
Stability |  | The system is stable. |
 | The system is not stable. | |
PSS |  | The PSS is enabled. |
 | The PSS is no longer enabled. | |
Recording |  | Data is being saved. |
 | No data is being saved. | |
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Tab | Oscilloscopes | Waveforms displayed on the oscilloscopes |
Display1 | Oscilloscope 1 | “Generator mechanical angle (degree)”. Mechanical angle of the generator delta in degrees. |
Oscilloscope 2 | “BUS 4 magnitude voltage (pu)”. Voltage magnitude in pu of phase A on bus 4. | |
y-axis scale | Setting the y-axis scale on the oscilloscope displaying the rotor mechanical angle. | |
y-axis offset | Setting y-axis offset on the oscilloscope displaying the rotor mechanical angle. | |
Display 2 | Oscilloscope 1 | “Generator mechanical angle (degree)”. Generator mechanical angle delta in degrees for 6 seconds, when a fault occurs and trigger “Trig-Acq.Gr. 2” is active. |
Oscilloscope 2 | “BUS 4 magnitude voltage (pu)”. Voltage magnitude in pu of phase A on bus 4 over a period of 6 seconds when a fault occurs and trigger “Trig-Acq.Gr. 2” is active. | |
y-axis scale | Setting the y-axis scale on the oscilloscope displaying the rotor mechanical angle | |
y-axis offset | Setting the y-axis offset on the oscilloscope displaying the rotor mechanical angle. | |
delta_file | File number for delta angle data saved during fault. | |
voltage_file | File number for bus 4 voltage data saved during fault. |
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