Proceedings ArticleDOI
An adaptive filter algorithm for on-site partial discharge measurements
TLDR
A PD (partial-discharger) measuring device to improve on-site measurements has been developed that is based on a digital filtering algorithm that suppresses external sinusoidal disturbances effectively.Abstract:
A PD (partial-discharger) measuring device to improve on-site measurements has been developed that is based on a digital filtering algorithm. The adaptive filter reduces periodic interference, e.g. from broadcasting stations. The filter principle is based on a fast Fourier transform that it suppresses external sinusoidal disturbances effectively. Even partial discharges with an apparent charge less than the basic interference level can easily be detected. >read more
Citations
More filters
Journal ArticleDOI
Wavelet-based denoising of partial discharge signals buried in excessive noise and interference
L. Satish,B. Nazneen +1 more
TL;DR: A novel, semi-automatic, and empirical wavelet-based method is proposed to recover PD pulses buried in excessive noise/interference comprising of random, discrete spectral, pulsive, and any combination of these interferences occurring simultaneously and overlapping-in-time with the PD pulses.
Journal ArticleDOI
Evaluation of digital filters for rejecting discrete spectral interference in on-site PD measurements
V. Nagesh,B.I. Gururaj +1 more
TL;DR: A critical study of the performance of several digital filters for rejecting discrete spectral interference in partial-discharge (PD) testing is reported, and the nonadaptive methods are found to be stable against impulsive disturbances, while adaptive methods are unstable.
Journal ArticleDOI
Partial Discharge Testing of Aerospace Electrical Systems
F Alrumayan,Ian Cotton,A Nelms +2 more
TL;DR: In this article, two electrical test techniques that can be used to measure partial discharge activity are introduced, and the balanced technique is used to examine the partial discharge performance of four test objects that are stressed with high voltages at varying frequencies of both sine and square waveforms.
Proceedings ArticleDOI
A new threshold function for de-noising partial discharge signal based on wavelet transform
TL;DR: A new nonlinear threshold function for de-noising PD signal using wavelet transform (WT) technique that is continuous as the soft threshold function and also uses the unused coefficients which are less than threshold value which are set to zero in different threshold function.
Proceedings ArticleDOI
Self-learning digital filter for the field location of partial discharge in cables
Zhifang Du,M.S. Mashikian +1 more
TL;DR: In this article, a self-learning digital filter aimed at mitigating the permanent background noise encountered during field tests has been shown to be mainly due to amplitude modulation (AM) radio signals.
References
More filters
Journal ArticleDOI
On the use of windows for harmonic analysis with the discrete Fourier transform
TL;DR: A comprehensive catalog of data windows along with their significant performance parameters from which the different windows can be compared is included, and an example demonstrates the use and value of windows to resolve closely spaced harmonic signals characterized by large differences in amplitude.
Journal ArticleDOI
A Commentary on Partial Discharge Measurement and Detection
TL;DR: In this paper, a critical review is presented on the various electrical methods available for partial discharge detection and measurement in terms of their chronological development and application on cable, capacitor, transformer, and machine insulation specimens.
Journal ArticleDOI
A New Method for Detection and Location of Distributed Partial Discharges (Cable Faults) in High Voltage Cables Under External Interference
TL;DR: In this paper, the authors proposed a new electronic PD detection and location method of high sensitivity and accuracy, which allows the recording and evaluation of partial discharges in HV cables even under the influence of external interference.
Proceedings ArticleDOI
The application of the pulse discrimination system to the measurement of partial discharges in insulation under noisy conditions
I. A. Black,N. K. Leung +1 more
TL;DR: The test results demonstrate that a single small pulse can be detected when it is buried in interference, and shows that partial discharge characteristics taken under quiet conditions are similar to those recorded with considerable radio and pulse interference.
Related Papers (5)
Wavelet-based denoising of partial discharge signals buried in excessive noise and interference
L. Satish,B. Nazneen +1 more
Evaluation of digital filters for rejecting discrete spectral interference in on-site PD measurements
V. Nagesh,B.I. Gururaj +1 more