How to discriminate faulted phase from a non faulted phase, in case of distorted three phase current with equal amplitudes during fault condition ?

3 views (last 30 days)
I am working on fault detection and fault classification in power system transmission line model in MATLAB/Simulink. I have run the simulation model from 0 to 5 min in MATLAB/Simulink. I am getting the transmission line three phase to ground current as distorted with equal amplitudes during fault condition from 4.5 min to 4.55 min, the figure of which is attached below ? So, How to discriminate faulted phase from a non faulted phase, in case of distorted three phase to ground current with equal amplitudes, in order to have correct fault detection ?
I want only just some clue or tips or idea for this, I am not asking for an exact answer to the question.

Answers (2)

Suman Sahu
Suman Sahu on 10 Mar 2023
Hi Siddharth,
I do not have much knowledge in the power system transmission line models. So, I cannot directly help you with your code. However, I can guide you on possible ways how you can achieve this.
When the three-phase to ground current has equal amplitudes during a fault condition, it can be difficult to discriminate between the faulted phase and non-faulted phases based on the current amplitudes alone. In such cases, other methods can be used to determine the faulted phase. Here are some approaches that you can try:
  1. Phase comparison method: In this method, the phase angle difference between the voltage and current signals of each phase is compared. During a fault, the phase angle difference of the faulted phase will be different from the other phases. This method requires accurate phase angle measurements.
  2. Symmetrical component method: In this method, the positive, negative, and zero sequence components of the current signal are calculated. During a fault, the positive sequence component of the faulted phase will be different from the other phases. This method requires accurate sequence component calculations.
  3. Wavelet transform method: In this method, the current signal is decomposed into its time-frequency components using wavelet transform. The features of the wavelet coefficients can be used to discriminate the faulted phase from the non-faulted phases.
You can try these methods and see which one works best for your case.
Hope it helps.

Siddharth Kamila
Siddharth Kamila on 12 Mar 2023
okay sir

Products


Release

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!