Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2002.07b
- /
- Pages.894-899
- /
- 2002
A Study on Diagnosis of Partial Discharge Type Using Wavelet Transform-Neural Network
웨이블렛-신경망을 이용한 부분방전 종류와 진단에 관한연구
Abstract
In this papers, we proposed the new method in order to diagnosis partial discharge type of transformers. For wavelet transform, Daubechies filter is used, we can obtain wavelet coefficients which is used to extract feature of statistical parameters (maximum value, average value, dispersion, skewness, kurtosis) about high frequency current signal per 3-electrode type (needle-plane electrode, IEC electrode and Void electrode.). Also. these coefficients are used to identify Signal of internal partial discharge in transformer. As a result. from compare of high frequency current signal amplitude and average value. we are obtained results of IEC electrode> Void electrode> Needle-Plane electrode. otherwise. In case of skewness and kurtosis, we are obtained results of Void electrode> IEC electrode > Needle-Plane electrode. As Improved method in order to diagnosis partial discharge type of transformers, we use neural network.
Keywords
- Acoustic Emission Signals;
- Discrete Wavelet Transform;
- Wavelet coefficient;
- Feature Extraction;
- Multi-Decomposition;
- Neural-Network