Metrics

  • citations in SCIndeks: 0
  • citations in CrossRef:0
  • citations in Google Scholar:[]
  • visits in previous 30 days:4
  • full-text downloads in 30 days:2

Contents

article: 5 from 5  
Back back to result list
Frequency-time diagram of partial discharge pulses recorded on large generators
aUniversity of Belgrade, Electrical Engineering Institute 'Nikola Tesla'
bUniversity of Belgrade, Faculty of Electrical Engineering

emailnenad.kartalovic@ieent.org
Keywords: partial discharges; large generators; frequency-time diagram
Abstract
This paper analyses the use of equivalent frequency-equivalent time diagram (FT diagram) of partial discharge (PD) pulses, regarding voltage and charge pulses. The described approach is widely used for large generators insulation testing purposes. For sake of clarity the certain types of partial discharge phenomena in insulation of electric machines are described and explained. The contemporary FT analysis of PD pulses is based on equivalent frequency and equivalent pulse time width derived by signal processing techniques and calculations. The numerical simulation derived and experimentally derived results are compared and evaluated for each kind of PD pulses (voltage or charge pulses). Next, the high voltage (HV) device with distributed parameters connected to HV voltage source is simulated. The parameters used in the simulation correspond to one real large synchronous generator. The obtained results lead us to the conclusion that the processing of the strain of PD charge pulses gives much more accurate results than the processing of the strain of PD voltage pulses. The experiment conducted on a large hydro generator confirmed the previous conclusions. At a same time, the sources of recorded results dispersion are shown and explained.
References
*** (2000) High-voltage test techniques: Partial discharge measurements. IEC 60270
Altenburger, R., Heitz, C., Timmer, J. (2002) Analysis of phase-resolved partial discharge patterns of voids based on a stochastic process approach. Journal of Physics D: Applied Physics, 35(11): 1149-1163
Azuaje, C., Millan, A. (2006) Stator Deformation of Large Hydrogenerators and Its Effects on the Machines. in: IEEE/PES Transmission & Distribution Conference and Exposition: Latin America, pp.1-5
Boashash, B. (2003) Time-Frequency Signal and System Analysis. in: Time Frequency Analysis, Amsterdam: Elsevier, str. 85-158
Elektroprivreda Srbije, Elektrotehnički institut Nikola Tesla (2013) Formiranje dijagnostičkog centra za realizaciju monitoringa parcijalnih pražnjenja u is na generatorima u elektranama EPS. Beograd
Frigo, M., Johnson, S.G. (1998) FFTW: An Adaptive Software Architecture for the FFT. in: Proc. of the Int. Conf. on Acoustics, Speech, and Signal Processing, Vol. 3, pp. 1381-1384
Kartalović, N., Miljaković-Jevtić, I., Zec, F., Žigić, A., Babić, B. (2015) Savremene metode monitoringa i analize parcijalnih pražnjenja kod velikih generatora. in: 59. ETRAN, 8.-11. juna 2015, Srebrno jezero, Srbija, EE, EE2.3
Kartalović, N., Milosavljević, S., Jevtić-Miljaković, I. (2010) Numerička Analiza naelektrisanja parcijalnih pražnjenja. in: 54. Konferencije za ETRAN, Donji Milanovac, jun, Zbornik radova
Kartalović, N. (2000) Stohastičnost dielektrične čvrstoće gasne izolacije, ETF Beograd. disertacija
Kartalović, N., Kovačević, D., Milosavljević, S. (2011) An advanced model of partial discharge in electrical insulation. Facta universitatis - series: Electronics and Energetics, vol. 24, br. 1, str. 41-55
Lim, Y.S., Koo, J.Y. (2003) Comparative Analysis of Partial Discharge Patterns from Different Artificial Defects by Means of Conventional Phase-Resolved Partial Discharge Analysis and a Novel Chaotic Analysis of Partial Discharge. Journal of the Korean Physical Society, Vol. 42, No. 6, pp. 755-764. June
Milošević, A., Kartalović, N., Gavrilović, B., Savić, M.S. (2007) Numeričko modelovanje parametara parcijalnih pražnjenja. NM9 ETRAN 51, Herceg Novi
Morshuis, P.H.F. (2005) Degradation of solid dielectrics due to internal partial discharge: some thoughts on progress made and where to go now. IEEE Transactions on Dielectrics and Electrical Insulation, 12(5): 905-913
Osmokrovic, P., Kartalovic, N., Atanackov, N., Ostojic, D. (2000) Model law for gas isolated system. IEEE Transactions on Plasma Science, 28(1): 298-302
Schwab, A.J. (1981) Hoshspanungs Messtechnik: Messgerate und Messverfahren. Heidelberg: Springer-Verlag
Toader, M., Mariana, D. (2000) Electrical insulation study using partial discharge model. in: Electrotechnical Conference, 2000. MELECON 2000. 10th Mediterranean, 29-31 May 2000, Volume 3, Page(s): 1060 - 1063
 

About

article language: Serbian
document type: Professional Paper
DOI: 10.5937/zeint25-9539
published in SCIndeks: 05/01/2016
peer review method: single-blind

Related records

Tehnika (2016)
Numerical modeling of partial discharges parameters
Kartalović Nenad M., et al.

IMK-14 Istraživanje i razvoj (2016)
Application of MATLAB software in digital signal processing by fast Fourier transform
Gavrilović Snežana, et al.