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How to implement Voltage dip by using Bus Fault during dynamic simulation?

asked 2019-10-09 03:05:40 -0500

LLL gravatar image

I build a SMIB to do the dynamic simulation.

During the simulation, I need to apply a Voltage dip(from 1PU to 0.7PU) at 2s for the point of connection (for example bus 4).

If I don't use the playback model, how can I implement the Voltage dip? Is it possibel to apply the Bus Fault? Thank you very much.

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answered 2019-10-10 06:13:04 -0500

perolofl gravatar image
  1. Calculate the three phase short circuit power at bus 4 with ASCC.

  2. Simulate a bus fault and use the following fault admittance in MVA: B = dV * Sc.

If the short circuit power is 5000 MVA and the voltage drop is 0.3 pu (1pu-0.7pu) the fault admittance becomes 0.3 * 5000 = 1500 MVA. The following fault is applied:

image description

This will roughly result in the wanted voltage dip to 0.7 pu. If needed, you can fine tune the fault admittance in order to come closer to 0.7 pu voltage.

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Thank you very much. It is very useful.

LLL gravatar imageLLL ( 2019-10-10 23:57:30 -0500 )edit

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Asked: 2019-10-09 03:05:40 -0500

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Last updated: Oct 10