Disturbances

Faults or Commutation failure (None =0, Valve= 1, DC=2, Misfiring = 3, DCY=4, DCD=5): Specifies the type of fault.

• 0 if no disturbance is desired;
• 1 for valve fault (short circuit);
• 2 for ground fault on converter terminals;
• 3 for simulation of commutation failure;
• 4 for a fault to be applied in the converter connected to the wye secondary of the transformer
• 5 for a fault to be applied in the converter connected to the delta secondary of the transformer
  
  
• Valve No. for fault or commutation failure (1-12): Number of valve to which the fault or the commutation failure is applied. Numbers 1 to 12 correspond to the following valves (see Figure 11 - 5): 1Y, 2Y, 3Y, 4Y, 5Y, 6Y, 1D, 2D, 3D, 4D, 5D, 6D.
• DC fault R: Value of fault resistance on converter terminals (ohm) (see Figure 11 - 5).

Reference step (None = 0, Iref =1, Vref=2): Specifies the reference step:

• 0 if no step is desired;
• 1 for a step in the current reference;
• 2 for a step in the voltage reference (see Figure 11 - 9).
• ΔIref or ΔVref: Step size for current or voltage reference (pu);
• Start time: Start time of the disturbance (second);
• End time: End time of the disturbance (second).