Troubleshooting Fault Current Limiter Simulation in Ansoft Maxwell 14

[Arthur Filho]

Hi,

I'm trying to simulate a fault current limiter at ansoft maxwell 14 and i have a problem when i put the stranded option on winding, the current that appears is always positive, with the axis above zero. Anyone can answer me what's happening and how can i fix this?

Some date:
Transient
Winding: Voltage
Initial current: 0
R: 0
L: 0
V: 127*sqrt(2)*sin(2*3,14*60*time)

 

[Achy47]

Hi there,

Thank you for reaching out with your question about simulating a fault current limiter in Ansoft Maxwell 14. Based on the information you provided, it seems like you are experiencing a problem with the current direction when using the stranded option on the winding.

Firstly, it is important to make sure that the direction of the current is correctly specified in your simulation. In Ansoft Maxwell, the current direction is determined by the direction of the winding. Therefore, if the winding is oriented in the opposite direction, the current will also appear to be in the opposite direction.

If you are sure that the winding direction is correct, then the issue could be related to the initial conditions you have set for the simulation. Since you have specified an initial current of 0, the current will always start at 0 and then increase in the positive direction as the simulation progresses. This could explain why the current always appears to be positive.

One way to fix this could be to specify a non-zero initial current value that is in the opposite direction of the current you are trying to simulate. This will allow the current to initially flow in the desired direction and then increase or decrease accordingly.

Additionally, it is important to check the values you have set for the resistance (R) and inductance (L) of the winding. If these values are set to 0, it could also cause the current to always appear positive.

Lastly, I would recommend checking the waveform of the voltage source you have specified. Make sure it is a sinusoidal waveform with the correct frequency and amplitude. Any discrepancies in the voltage waveform could also affect the current direction.

I hope this helps you to troubleshoot the issue with your simulation. If you continue to have difficulties, I would recommend reaching out to Ansoft Maxwell's technical support team for further assistance.

Best of luck with your simulation!