Print Email Facebook Twitter Effect of acquisition parameters on equivalent time and equivalent bandwidth algorithms for partial discharge clustering Title Effect of acquisition parameters on equivalent time and equivalent bandwidth algorithms for partial discharge clustering Author Mor, A. R. (TU Delft DC systems, Energy conversion & Storage) Castro Heredia, L.C. (TU Delft DC systems, Energy conversion & Storage) Muñoz, F. A. (Universidad del Valle) Date 2017 Abstract The acquisition parameters of an unconventional Partial Discharge (PD) measuring system affect the way the PD pulses are recorded and in turn, the results of the data processing. The noise based on the oscilloscope's vertical resolution is a feature of the sampled signal that is always present when a digital acquisition system is used. In PD unconventional systems, several parameters such as the sampling frequency Fs, the acquisition time T, the number of samples N and the vertical resolution VR of the digitizer result in a wide oscilloscope-based noise variation, that could be quantified by the signal to noise ratio (snr). The classification map is a tool that came available with the development of unconventional systems, that due to their wide bandwidth are able to resolve PD pulses in time and apply clustering techniques for PD source separation. The equivalent time Teq and equivalent bandwidth Weq, used to plot the classification map, attempts to extract features of the PD pulses to form clusters so that classification of sources can be achieved. The classification map is based on the ability of separating PD sources by resorting to the parameters Teq and Weq, that are believed to show significant differences for distinct PD sources, while they are clearly consistent for the same source. This paper conducts a set of theoretical analysis and laboratory measurements to evaluate the influence of the oscilloscope-based noise on the results of Teq and Weq. The results proved that the classification map is heavily influenced by the signal to noise ratio. Subject Clustering techniquesEquivalent bandwidthEquivalent timePartial dischargesPhase resolved partial discharge pattern To reference this document use: http://resolver.tudelft.nl/uuid:2fc08a83-0471-4e0d-a875-233c35b6b9ad DOI https://doi.org/10.1016/j.ijepes.2016.12.017 ISSN 0142-0615 Source International Journal of Electrical Power & Energy Systems, 88, 141-149 Part of collection Institutional Repository Document type journal article Rights © 2017 A. R. Mor, L.C. Castro Heredia, F. A. Muñoz Files PDF 1_s2.0_S0142061516317628_main.pdf 3.83 MB Close viewer /islandora/object/uuid:2fc08a83-0471-4e0d-a875-233c35b6b9ad/datastream/OBJ/view