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Study of electric field distribution in 11kv cast-resin dry-type transformer

Study of electric field distribution in 11kv cast-resin dry-type transformer / Muhamad Farhan Zakaria
Alatubah jenis acuan resin kering digunakan secara meluas pada masa kini kerana penyelenggaraanya mudah dilakukan berbanding dengan alatubah minyak direndam dan alatubah SF6. Dalam projek ini, kajian alatubah jenis acuan resin kering dilakukan dengan memodelkan bahagian tubuh keratan di AutoCad. Model ini digunakan untuk mengkaji pengagihan medan elektrik di penggulungan Voltan Tinggi (HV). Analisis medan elektrik dilakukan menggunakan perisian Kaedah Elemen Finit dimana dalam kajian ini ialah dengan menggunakan Comsol Multiphysics. Kajian ini menumpukan pertukaran pengedaran medan elektrik apabila terjadi salah pada penggulungan HV. Kesan salah aturan gulungan membawa kepada pembentukan jurang udara di konduktor. Jurang udara mempunyai nilai medan elektrik kira-kira 7.16 x105 V / m. Simulasi untuk ideal dan ketidakbetulan gulungan dapat dijayakan dan pengedaran medan elektrik telah direkodkan. Pengagihan medan elektrik telah diplotkan dalam graf dimana graf untuk ideal dan misalignment dibincangkan. Berdasarkan graf tersebut ia telah ditunjukkan bahawa kesan ketidakseimbangan mempengaruhi tingkah laku bidang elektrik. _______________________________________________________________________________________________________ Cast resin dry type (CRDT) transformer is widely used nowadays as it is easy maintenance compared to the oil immersed transformer and SF6 transformer. In this project, the sectional core and winding of CRDT transformer was build using AutoCad. This model is used to study the electric field distribution at the HV winding. The electric field analysis is performed using Finite Element Method software whereas in this study by using Comsol Multiphysics. The study focused change of the electric field distribution when misalignment happened at the HV winding. This misalignment was caused by the mishandling of the transformer and the lifetime of the transformer. The effect of the misalignment leads to the formation of the air gap at the conductor. The air gap had a maximum value of the electric field which approximately 7.16 x105 V/m. The simulation for ideal and misalignment was a success and the electric field distribution was recorded. The electric field distribution was plotted in a graph and the graph for ideal and misalignment was discussed. It is shown that the effect of misalignment influenced electric field behaviour.
Contributor(s):
Muhamad Farhan Zakaria - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875008726
Language:
English
Subject Keywords:
(CRDT); transformer; AutoCad
First presented to the public:
6/1/2019
Original Publication Date:
3/11/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 51
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-03-11 15:29:47.04
Date Last Updated
2020-10-09 16:02:17.721
Submitter:
Mohd Jasnizam Mohd Salleh

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