{"title":"Parametric conditions for generation of stable atmospheric pressure nonthermal plasmas","authors":"X. Deng, M.G. Kong","doi":"10.1109/CEIDP.2001.963636","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963636","url":null,"abstract":"Nonthermal plasmas generated at atmospheric pressure have recently found many applications such as surface cleaning and pollution control. One plasma generation configuration consists of two dielectrically insulated parallel plates with application of an AC voltage of several kV and several kHz. Such a plasma generating structure is very similar to many HV insulating systems and equipment and as such they share much similarity in the evolving plasma and associated plasma-structure interaction. In this contribution, we develop a one-dimensional numerical model to simulate discharge plasmas supported by such an insulated electrode structure and for simplicity we consider helium as the working gas. Assuming that the hydrodynamic approximation applies, various ionization, excitation and recombination processes are considered as sources of generation of charged particles and excited species. Boltzmann equations are then solved in conjunction with the Poisson equation. Numerical examples are then used to explore the conditions under which the induced plasma is nonthermal. Also studied is the dependence of the plasma upon frequency of the applied voltage and the pressure of the ambient gas. These correlative relationships should also be true for many insulating devices and systems.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125536957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Barrier discharge characteristics of wire-pole electrodes with ferro-electric barriers","authors":"Y. Kawada, T. Kaneko, T. Ito, J. Chang","doi":"10.1109/CEIDP.2001.963564","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963564","url":null,"abstract":"Corona discharge induced non-thermal plasma has been used for cleaning of dust particles, VOCs, NOx, SO/sub 2/, etc. in flue gas. Barrier discharge with ferro-electric materials can generate strong streamer corona and often can be used for such applications. In this paper, the characteristics of ferro-electric barrier discharge were experimentally investigated for wire-rod and wire-quadrupole type electrode geometries. In the present experimental apparatus, all the grounding electrodes covered by 1mm thick glass tubes and with/without 0.3mm thick barium titanate sheath on corona wires were tested. The dielectric constant of barium titanate is approximately 10,000. The results show that: (1) when corona wire is covered with barium titanate sheath, discharge current slightly decreases in each electrode configuration by comparison with no ferro-electric barriers; (2) compared with wire-rod, the current pulse frequency in the quadrupole become higher. The effects of dielectric barriers on the discharge current waveforms; were discussed in detail.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122425365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"High dielectric permittivity by ionic space charge polarization in polyethylene oxide","authors":"H. Kliem, A. Wagner","doi":"10.1109/CEIDP.2001.963627","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963627","url":null,"abstract":"The nominal static dielectric permittivity of polyethylene oxide can be as high as /spl epsi//sub r/'=150000. The permittivity depends strongly on frequency, humidity absorption, sample thickness, temperature, bias field, and dopant concentration. This behavior is due to an ionic space charge movement with blocking and accumulation of ions at the electrodes. The space charge polarization is modeled in the following way: mobile positive ions fluctuate in a three dimensional multi-well potential by thermal activation. A negative background charge of the same magnitude provides overall charge neutrality. To calculate the local field at each well, the Coulomb interactions between the ions and the image charges in the electrodes are considered. A Monte Carlo simulation yields the experimental results with respect to the investigated parameters. In the time domain a Kohlrausch behavior of the polarization current j/spl sim/t/sup -1.2/ is computed due to the attraction between the ions in the material and their image charges in the electrodes.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122539544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of the electrode materials on performance of plasma opening switch","authors":"B. Feng, Zeng Zhengzhong, Qiu Yuchang","doi":"10.1109/CEIDP.2001.963485","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963485","url":null,"abstract":"To compare erosion characteristics between different metallic materials, four metallic materials, namely duralumin, durimet, industrial pure molybdenum and copper-tungsten alloy, are used as plasma opening switch test-bed cathode under the impulse current condition for conduction time up to 3 microseconds, and their surface morphology and erosion characteristics are investigated by means of surface microcosmic analysis. The influences of the material microstructure, chemical composition and properties on their erosion characteristics and switch performance are analyzed.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122719789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Lightning shielding of transmission line and lightning stroke simulation model","authors":"H. Zhan, Fuchang Lin, Xiaoyu Wang","doi":"10.1109/CEIDP.2001.963630","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963630","url":null,"abstract":"In view of the insufficiencies of present lightning shielding theory (electrogeometric model and leader propagation model), the physical process of lightning stroke and the scatter of shielding failure on transmission line were studied. Some new knowledge of lightning shielding of transmission line and the simulation theory is proposed. A lightning stroke simulation model of transmission line, which is based on the probability of discharge, is proposed. The model was applied to calculate the rate of shielding failure of 500 kV ZM/sub 1/-39 transmission line. Calculated results using the proposed model show good agreement with field experiences.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122882420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Partial discharge patterns for silicone rubber insulators under salt-fog","authors":"I. Lopes, S. Jayaram, E. Cherney","doi":"10.1109/CEIDP.2001.963579","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963579","url":null,"abstract":"The paper presents an investigation on the use of partial discharge (PD) as a means to study the development of leakage current (LC) on silicone rubber insulators in a salt-fog chamber. Simultaneous measurements of low-level LC and PD on dead-end type silicone rubber insulators are performed. Signal processing techniques are then applied to the recorded PD data, features such as the maximum and mean charge of the PD pulses are extracted, and the PD trends are obtained using the moving average technique. The results show that PD is a sensitive method for detecting the transition from corona from water droplets to dry-band arcing and an alternative to study the early ageing stage of silicone rubber insulators.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116828613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Response of electrostatic probes to eccentric charge distributions","authors":"Torben Johansson, Iain Wilson","doi":"10.1109/CEIDP.2001.963629","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963629","url":null,"abstract":"The response of an electrostatic probe mounted in an electrode is examined with reference to eccentric charge distributions. The study involves using the probe /spl lambda/ function to derive a characteristic parameter. This parameter enables the response of the probe to different degrees of eccentricity to be quantitatively assessed.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121159868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Wavelets for the analysis and compression of partial discharge data","authors":"X. Ma, C. Zhou, I. Kemp","doi":"10.1109/CEIDP.2001.963550","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963550","url":null,"abstract":"One of the major problems encountered in the on-line condition monitoring of partial discharges for high voltage plant items is the huge volume of memory required to store PD data. This paper proposes wavelet-based and wavelet packet-based compression methods for PD measurement data, which are performed through wavelet decomposition, detail coefficient thresholding and signal reconstruction. All of the compression methods associated with these strategies are treated and the compression results as applied to practical PD data are compared. Using this technique in conjunction with the transitional compression method, it has been demonstrated that data from partial discharge activity can be compressed to approximately 5% of its original volume, which is very promising for practical on-line condition monitoring.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114834634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Crine, V. Buchholz, M. Colwell, S. Cherukupalli, Boaz Bernstein
{"title":"Influence of aging on polarization currents and return voltage measured in PILC cables","authors":"J. Crine, V. Buchholz, M. Colwell, S. Cherukupalli, Boaz Bernstein","doi":"10.1109/CEIDP.2001.963517","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963517","url":null,"abstract":"The condition assessment of PILC cables is a crucial factor for many utilities and this paper is devoted to the evaluation of some new diagnostic techniques enabling users to effectively manage their PILC cable assets. We used different electrical and chemical techniques to measure the electrical and dielectric properties of paper-impregnated insulation. The non-destructive electrical tests performed on three full-length field-aged PILC cables were : the isothermal relaxation current (IRC), the LIpATEST leakage current test and the return voltage method (RVM). Chemical tests were performed on small samples of paper tapes and oil taken from the same samples. They were : dielectric analysis, Fourier transform infra red (FTIR) spectroscopy and moisture content analysis, The electrical techniques ranked the cables consistently, that is one cable aged 23 years seemed to be more severely aged than the older (34 years) and younger (4 years) cables. This could possibly be explained by the acids detected in the oil of the 23 year old cable using FTIR spectroscopy. Although more data on more cables would be needed it already appears that the tested techniques could assess the condition of the insulation of PILC cables. It was observed that the electrical measurements performed on cable samples 9 to 40 meter long were highly sensitive to the sample length. The limits of the available commercial testing equipment are also discussed.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128067353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Temperature distribution in fluids treated by pulsed electric fields [food preservation]","authors":"H. van den Bosch, P. Morshuis, J. Smit","doi":"10.1109/CEIDP.2001.963603","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963603","url":null,"abstract":"An approximate analytical model as well as a model using the finite element method are presented for calculation of the temperature distribution in a fluid flowing continuously through a pulsed electric field treatment chamber for preservation. Three parameters in an axisymmetric cofield geometry, with electric field direction coincident with the flow direction, are varied to determine their effect on the maximum temperature. The calculation results are compared with experimental results.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115983983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}