Results 81 to 90 of about 17,847 (159)

Partial discharge characteristics of insulation used in inverter-fed traction motor under high frequency impulse

, 2012
Stator insulation in inverter-fed traction motors may prematurely lose its function due to continuous square impulses voltage of converters, whose insulation failure mechanism is different from that under power frequency AC voltage. Partial discharge (PD)
Cao, Kaijiang, Wu, Guangning, Luo, Yang, Cui, Yi   +3 more
core   +1 more source

Partial Discharge in Compressed Gases and Deterioration of Plastics by the Partial Discharge

IEEJ Transactions on Fundamentals and Materials, 1972
HOH, S., KOUNO, T., TAKAHASHI, Y., IWATA, Z.   +3 more
openaire   +2 more sources

A novel calibration method for PD measurement in power cables and joints using capacitive couplers

, 2004
Partial discharge (PD) measurements are universally accepted as a technique giving some indication of the state of the insulation in high voltage apparatus.
Xu, Y, Zhong, L, Chen, G
core  

Partial discharge pulse sequence patterns and cavity development times in transformer oils under ac conditions

, 2005
Discrete partial discharge (PD) pulse occurrence times within the PD pulse bursts in transformer oils were found to extend from approximately 0.42 to 2.9 mu s, with the discrete pulse separation times evincing a weak dependence on the inverse of the oil ...
POMPILI, Massimo, R. Bartnikas, MAZZETTI DI PIETRALATA, Carlo   +2 more
core   +1 more source

Identification of partial discharges in cable terminals of high-speed EMUs based on fuzzy C-means clustering

机车电传动
As an effective means to diagnose the insulation status of on-board cable terminals, partial discharge detection faces strong interference in the actual operating environment of trains. To address this issue, this paper proposed a strategy for separating
YANG Yanhua, CEHN Zhenbao, CAO Han, ZHANG Yanlin, LIU Kai, CHEN Kui, GAO Guoqiang   +6 more
doaj  

Condition Monitoring of Power Cables

, 2007
A National Grid funded research project at Southampton has investigated possible methodologies for data acquisition, transmission and processing that will facilitate on-line continuous monitoring of partial discharges in high voltage polymeric cable ...
Swaffield, D J, Hao, L, Swingler, S G, Lewin, P L   +3 more
core  

A new method for automatic Multiple Partial Discharge Classification

, 2011
A new wavelet based feature parameter have been developed to represent the characteristics of PD activities, i.e. the wavelet decomposition energy of PD pulses measured from non-conventional ultra wide bandwidth PD sensors such as capacitive couplers (CC)
Contin, A., Lewin, P.L., Michel, M, Hao, L, Hunter, Jack, Walton, C, Swaffield, D.J.   +6 more
core  

Partial discharge

, 2014
The main subject of this diploma’s thesis is the creation of laboratory task on the partial discharge. The thesis is made up of two parts: theoretical and practical. In the theoretical part there are information about partial discharge.
Macek, Vratislav
core   +2 more sources

Localization for Dual Partial Discharge Sources in Transformer Oil Using Pressure-Balanced Fiber-Optic Ultrasonic Sensor Array

Sensors
The power transformer is one of the most crucial pieces of high-voltage equipment in the power system, and its stable operation is crucial to the reliability of power transmission.
Feng Liu, Yansheng Shi, Shuainan Zhang, Wei Wang   +3 more
doaj   +1 more source

THE ANALYSIS OF PARTIAL DISCHARGE (PD) FROM ELECTRICAL TREEING IN LINEAR LOW DENSITY POLYETHYLENE (LLDPE) AND HIGH DENSITY POLYETHYLENE (HDPE)

Teknik, 2012
Recently, the transmission of electric energy has been developed by insulated cable. The suitable materialas an insulated cable is LLDPE and HDPE. In order to understand the quality of insulation system, themeasuring of PD has done.
Hermawan Hermawan, Abdul Syakur
doaj