Topic
Partial discharge
About: Partial discharge is a research topic. Over the lifetime, 13997 publications have been published within this topic receiving 102058 citations. The topic is also known as: PD.
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01 Jan 1984
TL;DR: In this paper, the authors present a bibliography and survey of the literature concerned with theory and measurement of the stochastic behavior of pulsating partial discharge (PD) phenomena that can occur when insulation is subjected to electrical stress.
Abstract: The author presents a bibliography and survey of the literature concerned with theory and measurement of the stochastic behavior of pulsating partial-discharge (PD) phenomena that can occur when insulation is subjected to electrical stress. The types of PD phenomena considered include AC and DC generated electron avalanches, pulsating positive and negative corona in gases, and PD that occur in liquid media and in the presence of solid dielectric surfaces. The basic physical mechanisms of discharge initiation, growth, and memory propagation that determine the probability distributions for pulse occurrence times and pulse amplitudes are discussed. Consideration is also given to special problems associated with the measurement and interpretation of data on the various statistical properties of PD phenomena. >
195 citations
01 Jan 2004
TL;DR: The Physics of Air Breakdown and Applications SF6 Insulation Systems and their Monitoring Lightning Phenomena and Protection Systems Partial Discharge and their Measurement ZNO Surge Arresters Insulations for Outdoor Applications Overvoltage and Insulation Co-ordination on Transmission Earthing Circuit Breakers and Interruption Polymer Insulation Power Cable Numerical analysis of Electrical Fields in High Voltage Environments Optical Measurements and Monitoring in Pulsed Power - Principles and Applications as discussed by the authors.
Abstract: The Physics of Air Breakdown and Applications SF6 Insulation Systems and their Monitoring Lightning Phenomena and Protection Systems Partial Discharge and their Measurement ZNO Surge Arresters Insulations for Outdoor Applications Overvoltage and Insulation Co-ordination on Transmission Earthing Circuit Breakers and Interruption Polymer Insulation Power Cable Numerical Analysis of Electrical Fields in High Voltage Environments Optical Measurements and Monitoring in High Voltage Environments Pulsed Power - Principles and Applications.
194 citations
TL;DR: In this article, a defect such as a free metallic particle or stress-raising edge on an electrode could lead to breakdown in a gas insulated substation (GIS), but may be detected by the partial discharges it generates.
Abstract: A defect such as a free metallic particle or stress-raising edge on an electrode could lead to breakdown in a gas insulated substation (GIS), but may be detected by the partial discharges it generates. Of the various detection means available, most success has been achieved with either acoustic transducers to detect sound waves from the discharge, or electrical couplers to pick up the ultra-high-frequency (UHF) signals generated inside the GIS chambers. All new GIS in the UK are fitted with internal couplers for UHF monitoring, and two examples of continuous monitoring schemes on 400 kV GIS at nuclear power stations are described. Further developments, which are already well advanced, include specifying and measuring the coupler characteristics, making use of expert systems to interpret the UHF discharge data, and extending the monitoring system to include the performance of circuit breakers and other equipment. >
193 citations
TL;DR: In this article, the authors describe the formation of low-density domains or channels in the bulk by carrier injection from electrical contacts and subsequently dissociative trapping and recombination as a necessary prelude.
Abstract: Electrical discharge and breakdown in low‐mobility insulating liquids and solids involve the creation of low‐density domains or channels in the bulk by carrier injection from electrical contacts and subsequently dissociative trapping and recombination as a necessary prelude. Internal discharge such as electrical treeing and breakdown are initiated by impact ionization within such low‐density domains or channels and then followed by an indefinite increase in carrier multiplication in the conduction level that extends the channels and finally destroys the material inside them.
193 citations
TL;DR: In this paper, a TiO2 semiconductive nanoparticles with a large relaxation time constant is added into transformer oil to form semiconductorive nanofluids (SNFs), with the aim of enhancing insulating characteristics.
Abstract: In this paper, TiO2 semiconductive nanoparticles with a large relaxation time constant is added into transformer oil to form semiconductive nanofluids (SNFs), with the aim of enhancing insulating characteristics. ac, dc and lightning impulse breakdown voltage and partial discharge (PD) characteristics of oil samples before and after modification were measured according to ASTM standard methods. It was found that SNFs have ac, dc and lightning impulse breakdown voltage up to 1.2 times compared with pure oil. Meanwhile, the partial discharge resistance of SNFs was also dramatically improved. Charge trap and transportation characteristics of both samples have been measured by thermally stimulated current method (TSC) and pulse electroacoustic technique (PEA). It was found that electron shallow trap density and charge decay rate are greatly increased in semiconductive nanoparticles modified transformer oil. It is proposed that electron trapping and de-trapping processes in the shallow traps could be one of the main charge transport processes in dielectric liquids.
191 citations