Analysis on Behaviour of Wavelet Coefficient during Fault Occurrence in Transformer

Sreewirote, Bancha; Ngaopitakkul, Atthapol

doi:10.1088/1755-1315/127/1/012008

Analysis on Behaviour of Wavelet Coefficient during Fault Occurrence in Transformer

Author(s)

Sreewirote, Bancha

Ngaopitakkul, Atthapol

Date Issued

March 5, 2018

Type

Conference Paper

DOI

10.1088/1755-1315/127/1/012008

Abstract

The protection system for transformer has play significant role in avoiding severe damage to equipment when disturbance occur and ensure overall system reliability. One of the methodology that widely used in protection scheme and algorithm is discrete wavelet transform. However, characteristic of coefficient under fault condition must be analyzed to ensure its effectiveness. So, this paper proposed study and analysis on wavelet coefficient characteristic when fault occur in transformer in both high- and low-frequency component from discrete wavelet transform. The effect of internal and external fault on wavelet coefficient of both fault and normal phase has been taken into consideration. The fault signal has been simulate using transmission connected to transformer experimental setup on laboratory level that modelled after actual system. The result in term of wavelet coefficient shown a clearly differentiate between wavelet characteristic in both high and low frequency component that can be used to further design and improve detection and classification algorithm that based on discrete wavelet transform methodology in the future.

Citation

Iop Conference Series Earth and Environmental Science, 127(1), 2018