Three phase transformer simulation unknown error: How do I fix it?

Iñigo Izaguirre

Hello,

I am trying to simulate the next three phase transformer. Is a 480/400 99KVA transformer with Dyn11 conection. I have done the next model with all the details of the design. I have also done two coil regions, non meshed ones for the first electromagnetic simulation and the volume defined as air winding is for the tenperature simulation will be done next to this simulation. In the picture you can see the model.

When I try to simulate the model it appears an error but it does not explain where is that error so I am wondering if somebody knows why I am getting this error. This is the error. I cant attach the project due to the size(any other way to upload it?). I would be very grateful of any help.

Thank you,

 

Iñigo Izaguirre

asoualmi

Hi,
Thanks for sharing the file. when you say the results are not very accurate, you compare with the measurement?can you give us a % of the difference?.
May be you can improve your results by increasing the quality of the mesh (refine a mesh in some part of the devic).
Best regards.

Iñigo Izaguirre

Okay I find the solution I had a voltage source in the circuit not defined. I will put here the model if anyone suggests me any improvement or error could I do or have. The results are not very accurate

Thank you

Iñigo Izaguirre

 

asoualmi

Hi,
Thanks for sharing the file. when you say the results are not very accurate, you compare with the measurement?can you give us a % of the difference?.
May be you can improve your results by increasing the quality of the mesh (refine a mesh in some part of the devic).
Best regards.

Iñigo Izaguirre

Abdessamed said:

Hi,
Thanks for sharing the file. when you say the results are not very accurate, you compare with the measurement?can you give us a % of the difference?.
May be you can improve your results by increasing the quality of the mesh (refine a mesh in some part of the devic).
Best regards.

Hello, yes I have compared with measurements where the output voltages are 4.7% lower than they should be(around 230V). I have put aided mesh as inactive and clicked mesh domain directly because if not it was too many nodes. But I dont know how to set up the mesh configuration. Can you explain me how to do the meshing part. This are the results I obtained.

 

asoualmi

Iñigo Izaguirre said:

Hello, yes I have compared with measurements where the output voltages are 4.7% lower than they should be(around 230V). I have put aided mesh as inactive and clicked mesh domain directly because if not it was too many nodes. But I dont know how to set up the mesh configuration. Can you explain me how to do the meshing part. This are the results I obtained.

 

Hi,

On the PDF file shared with you (see request about   thermal simulation of a power transformer) you can see that there are different strategies of the mesh (you can for example use the strategy 2). To do it :

• Deactivate the aided mesh
• Clean all mesh information
• Create a mesh point (for example mesh point type small (with a small value and you assign this to points on which you want to refine the mesh, for the infinite ox you can put mesh point type large (with high value).

There is an example on PDF file showing how to apply the mesh on the geometry.

The last thing checks if you use the same condition as the measurement (materials, circuit, voltage (current source, resistance, number of tuns…etc).

Thanks.