Loading...
Search for:
iec-60270-method
0.012 seconds
Online Monitoring of Multi-source PD Signals in a Single-phase Transformer Model with IEC 60270 and RF Methods
, Ph.D. Dissertation Sharif University of Technology ; Vakilian, Mehdi (Supervisor)
Abstract
Transformers are the key component in power system transmission and distribution networks. Condition based maintenance will increase their expected life and online monitoring is essential to ensure operation reliability. In this work a new approach to transformer online monitoring is provided based on partial discharge (PD) measurement.Multi-source PD signal separated using time-frequency S transform (ST) that is applied to the PD signal waveforms. The resultant ST matrix is then converted to gray scale image from which high level features are extracted using Bag of Words (BoW). Gaussian mixture model (GMM) clustering is used to discover clusters in the feature space. For recognition of...