Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Electrical breakdown or electrical treeing simulation in high voltage solid insulation material

Please login with a confirmed email address before reporting spam

I need to simulate an electrical tree i.e. breakdown path or cracks in insulation material created by the application of high voltage. For which,

  1. I am using AC/DC Electrostatics physics (time dependant).

  2. Define the geometry.

  3. Assign the material to it.

  4. Created a random perturbation (air bubble) into my base material.

  5. Applied the required voltage across the sample according to its breakdown strength.

  6. Added my partial differntial equations for electrical treeing: phase field model.

But the breakdown path/electrical tree doesnot initiate.

Can anyone please guide me in simulating electrical tree (breakdown path) in solid insulation material (Polyethylene). Do I need to add some other module for breakdown detection?

Thanks.


2 Replies Last Post Dec 4, 2020, 12:49 p.m. EST
Robert Koslover Certified Consultant

Please login with a confirmed email address before reporting spam

Posted: 3 years ago Dec 1, 2020, 7:37 p.m. EST
Updated: 3 years ago Dec 1, 2020, 7:39 p.m. EST

I am not aware of any breakdown physics being explicitly included in the AC/DC Electrostatics module. You can compute field strengths, but if you want to model the breakdown process, you will need a much more complicated implementation than merely electrostatics. Perhaps this article will be of interest to you: https://www.comsol.com/release/5.5/plasma-module . See also https://www.comsol.com/plasma-module . I suggest you contact Comsol Support and ask for their specific recommendations..

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
I am not aware of any breakdown physics being explicitly included in the AC/DC Electrostatics module. You can compute field strengths, but if you want to model the breakdown process, you will need a much more complicated implementation than merely electrostatics. Perhaps this article will be of interest to you: https://www.comsol.com/release/5.5/plasma-module . See also https://www.comsol.com/plasma-module . I suggest you contact Comsol Support and ask for their specific recommendations..

Please login with a confirmed email address before reporting spam

Posted: 3 years ago Dec 4, 2020, 12:49 p.m. EST
Updated: 3 years ago Dec 4, 2020, 1:03 p.m. EST

Thankyou sir for your reply. I am using partial differential equations to develop a phase field model for this phenomena as you said "breakdown physics being explicitly included in the AC/DC Electrostatics module" Can it be implicitly developed using phase field model? Under this condition do I need to use any other module.

Thankyou for your time.

Thankyou sir for your reply. I am using partial differential equations to develop a phase field model for this phenomena as you said "breakdown physics being explicitly included in the AC/DC Electrostatics module" Can it be implicitly developed using phase field model? Under this condition do I need to use any other module. Thankyou for your time.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.