Researching the effects on different temperature of dc surface flashover characteristics on solid insulating dielectric in vacuum what can improve the reliability applied to complex environments. In this paper, we use the self-made polyimide (PI) sample as the object of study. The dc surface flashover characteristics at different temperatures (193-353K) are experimental studied, with theoretical analysis. It is found that the dc surface flashover voltage presented first decreased and then increased and finally decreased again with the increasing of temperature. The dc flashover voltage reached the maximum at 313K and minimum at 273K respectively. The experiments suggest that the electron emission near the cathode, the charge transport of dielectric insulators and the gas desorption are important reasons for the affecting of PI material dc flashover voltage as the temperature increased. Besides, the characteristics of the material itself also has important effects when the temperature varied.
{"title":"DC surface flashover characteristics on polyimide under different temperature in vacuum","authors":"Zhenjun Zhang, Xiaoquan Zheng, Wenbin Wu, Pei Yang, Ping Peng","doi":"10.1109/CEIDP.2013.6748278","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748278","url":null,"abstract":"Researching the effects on different temperature of dc surface flashover characteristics on solid insulating dielectric in vacuum what can improve the reliability applied to complex environments. In this paper, we use the self-made polyimide (PI) sample as the object of study. The dc surface flashover characteristics at different temperatures (193-353K) are experimental studied, with theoretical analysis. It is found that the dc surface flashover voltage presented first decreased and then increased and finally decreased again with the increasing of temperature. The dc flashover voltage reached the maximum at 313K and minimum at 273K respectively. The experiments suggest that the electron emission near the cathode, the charge transport of dielectric insulators and the gas desorption are important reasons for the affecting of PI material dc flashover voltage as the temperature increased. Besides, the characteristics of the material itself also has important effects when the temperature varied.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126607840","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}
Pub Date : 2013-10-01DOI: 10.1109/CEIDP.2013.6748241
M. Abou-Dakka, Yaoren Chen
Space charge evolution in Polypropylene (PP) loaded with two types of nanoparticles, synthetic and natural clay were investigated using weekly reversing polarity. The space charges were measured with the PEA technique after certain periods of poling with both polarities. The charge distribution in the host materials was substantially smaller with reverse polarity compared to single negative polarity. This majority of charge injected with single polarity is likely due to compatibilizers, which are polar materials. The apparent charges due to dipoles are neutralized when the field is inversed and the remaining charges that fall in deep traps require more than ± 25 kV/mm to be released. To obtain and maintain space charge suppression for both polarities the nanoclay concentration in PP should be below the percolation threshold and ensure uniform distribution of nano-particles throughout polymer matrix. The PNC with 2-wt% of synthetic clay stores lots of charges with reverse polarity, especially after the end of the positive periods. So the synthetic PNC with 2-wt% will not be an optimal concentration. It is seen that 4-wt% (PP1-S4%) for the synthetic PNC and the 2-wt% (PP2-N2%) for the natural PNC are the optimal PNC concentrations. They store minimal charge, particularly in central zones. The absolute value of charge with reverse polarity of all the filled and unfilled materials could store charges relatively of same order. The quantity of charge in the unfilled material, PP1-0% shows continuous increase of charges and it becomes higher than the filled PNC, (except the PP1-S2%), after the 1st W of single polarity poling and the 12th W of reverse polarity poling. But the quantity of charge in the natural PNC was small and unaffected by the loading with nanoclay. Therefore, more poling time is necessary to examine the effect of long term poling on the charge evolution as we have reported earlier for single poling.
{"title":"Effect of reverse polarity on space charge evolution in polypropylene with different concentration of natural and synthetic nano clay","authors":"M. Abou-Dakka, Yaoren Chen","doi":"10.1109/CEIDP.2013.6748241","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748241","url":null,"abstract":"Space charge evolution in Polypropylene (PP) loaded with two types of nanoparticles, synthetic and natural clay were investigated using weekly reversing polarity. The space charges were measured with the PEA technique after certain periods of poling with both polarities. The charge distribution in the host materials was substantially smaller with reverse polarity compared to single negative polarity. This majority of charge injected with single polarity is likely due to compatibilizers, which are polar materials. The apparent charges due to dipoles are neutralized when the field is inversed and the remaining charges that fall in deep traps require more than ± 25 kV/mm to be released. To obtain and maintain space charge suppression for both polarities the nanoclay concentration in PP should be below the percolation threshold and ensure uniform distribution of nano-particles throughout polymer matrix. The PNC with 2-wt% of synthetic clay stores lots of charges with reverse polarity, especially after the end of the positive periods. So the synthetic PNC with 2-wt% will not be an optimal concentration. It is seen that 4-wt% (PP1-S4%) for the synthetic PNC and the 2-wt% (PP2-N2%) for the natural PNC are the optimal PNC concentrations. They store minimal charge, particularly in central zones. The absolute value of charge with reverse polarity of all the filled and unfilled materials could store charges relatively of same order. The quantity of charge in the unfilled material, PP1-0% shows continuous increase of charges and it becomes higher than the filled PNC, (except the PP1-S2%), after the 1st W of single polarity poling and the 12th W of reverse polarity poling. But the quantity of charge in the natural PNC was small and unaffected by the loading with nanoclay. Therefore, more poling time is necessary to examine the effect of long term poling on the charge evolution as we have reported earlier for single poling.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114288107","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}
Pub Date : 2013-10-01DOI: 10.1109/CEIDP.2013.6748161
Lianwei Bao, Jian Li, Xiao Lei, P. Sun, Jin Zhang
On-line monitoring of dissolved gas in oil is one of effective methods of condition assessment of transformers. Compared with the power transformer, valve side windings of converter transformer withstand pulsating voltage during the converter process. This paper presents gas generation properties of oil insulation under pulsating voltages, which are different from those under individual AC voltage. Three discharge models were designed and lots of partial discharge experiments were carried out to research the variation characteristics of dissolved gases in oil under pulsating voltages. The increment of gases concentration in oil during the progress of s of different discharge models were analyzed, the experiment results under pulsating voltages showed that the dissolved gas component content was obviously different under pulsating voltage and pure AC voltage. The results can provide the basis experimental data for condition assessment of converter transformer by using the method of online monitoring of dissolved gas in oil.
{"title":"Gas generation properties of oil-paper insulation under pulsating voltage","authors":"Lianwei Bao, Jian Li, Xiao Lei, P. Sun, Jin Zhang","doi":"10.1109/CEIDP.2013.6748161","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748161","url":null,"abstract":"On-line monitoring of dissolved gas in oil is one of effective methods of condition assessment of transformers. Compared with the power transformer, valve side windings of converter transformer withstand pulsating voltage during the converter process. This paper presents gas generation properties of oil insulation under pulsating voltages, which are different from those under individual AC voltage. Three discharge models were designed and lots of partial discharge experiments were carried out to research the variation characteristics of dissolved gases in oil under pulsating voltages. The increment of gases concentration in oil during the progress of s of different discharge models were analyzed, the experiment results under pulsating voltages showed that the dissolved gas component content was obviously different under pulsating voltage and pure AC voltage. The results can provide the basis experimental data for condition assessment of converter transformer by using the method of online monitoring of dissolved gas in oil.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114518030","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}
Pub Date : 2013-10-01DOI: 10.1109/CEIDP.2013.6747435
Peng Liu, Z. Xiang, X. Ning, Hua Feng, Zongren Peng
The effect of electrode material on the space charge behavior in epoxy resin has been investigated using the pulsed electro-acoustic (PEA) technique. Common metallic electrode materials, i.e. gold, silver and copper, were selected and sputter-coated on the specimens, and the space charge dynamics after the application of various electric fields were monitored at 293 K and 313 K. The space charge accumulation thresholds of epoxy resin with the three electrodes at these temperatures were also derived. It is found that homo space charge close to the electrodes make up the majority of the space charge in the specimens. It is pointed out that charge injection from electrodes accounts for the space charge accumulation process. Experimental results demonstrate that the electrode material has a considerable effect on the space charge behavior in epoxy resin. Furthermore, the differences in the amount of space charge accumulation and in the space charge accumulation thresholds with gold, silver, and copper electrodes are qualitatively explained by their different work functions.
{"title":"Effect of electrode material on space charge behavior in epoxy resin","authors":"Peng Liu, Z. Xiang, X. Ning, Hua Feng, Zongren Peng","doi":"10.1109/CEIDP.2013.6747435","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747435","url":null,"abstract":"The effect of electrode material on the space charge behavior in epoxy resin has been investigated using the pulsed electro-acoustic (PEA) technique. Common metallic electrode materials, i.e. gold, silver and copper, were selected and sputter-coated on the specimens, and the space charge dynamics after the application of various electric fields were monitored at 293 K and 313 K. The space charge accumulation thresholds of epoxy resin with the three electrodes at these temperatures were also derived. It is found that homo space charge close to the electrodes make up the majority of the space charge in the specimens. It is pointed out that charge injection from electrodes accounts for the space charge accumulation process. Experimental results demonstrate that the electrode material has a considerable effect on the space charge behavior in epoxy resin. Furthermore, the differences in the amount of space charge accumulation and in the space charge accumulation thresholds with gold, silver, and copper electrodes are qualitatively explained by their different work functions.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129554761","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}
Pub Date : 2013-10-01DOI: 10.1109/CEIDP.2013.6747102
Y. Murakami, T. Sugiyama, R. Funo, M. Fukuma, M. Nagao
One electrical insulation evaluation technology is the pulsed electroacoustic method, which detects the acoustic pressure due to the space charge in the bulk. To improve its reliability, a measurement system for the apparent acoustic impedance of the sample is introduced into the space charge measurement system. The apparent acoustic impedance of a polyethylene terephthalate film increases as the applied mechanical pressure increases. The position of the lower electrode signal shifts under a lower mechanical pressure and magnitude of the lower electrode signal decreases. The larger silicone oil layer lead to a charge shift due to interfacial polarization and a smaller magnitude of the pressure wave generated from the interface between the silicone oil layer and the sample.
{"title":"Influence of interfacial condition between film and lower electrode on space charge measurement","authors":"Y. Murakami, T. Sugiyama, R. Funo, M. Fukuma, M. Nagao","doi":"10.1109/CEIDP.2013.6747102","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747102","url":null,"abstract":"One electrical insulation evaluation technology is the pulsed electroacoustic method, which detects the acoustic pressure due to the space charge in the bulk. To improve its reliability, a measurement system for the apparent acoustic impedance of the sample is introduced into the space charge measurement system. The apparent acoustic impedance of a polyethylene terephthalate film increases as the applied mechanical pressure increases. The position of the lower electrode signal shifts under a lower mechanical pressure and magnitude of the lower electrode signal decreases. The larger silicone oil layer lead to a charge shift due to interfacial polarization and a smaller magnitude of the pressure wave generated from the interface between the silicone oil layer and the sample.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129591235","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}
Pub Date : 2013-10-01DOI: 10.1109/CEIDP.2013.6748159
H. Couderc, É. David, M. Frechette, A. Medjdoub
Polymers filled with inorganic nanoparticles have been extensively investigated in recent years because of their improved mechanical and electrical properties compared with the unfilled polymers. The most commonly used inorganic particles are oxides, particularly silica, because of their good properties and low cost. However, oxides have a hydrophilic nature, which leads to presence of water at the interface between particles and matrix. Due to the predominance of the particle-matrix interfaces in the case of nanocomposites, the presence of water in the interlayer region can become problematic. Moreover, the hydrophobic nature of most polymers, particularly polyolefins such as polyethylene, may make difficult the movement of this interfacial water. In this paper, dielectric spectroscopy was used during drying isothermal treatment at 80°C. The Maxwell - Wagner - Sillars relaxation peak sharpens and shifts to lower frequencies by three decades with time, translating into a modification of the interface between silica and polyethylene by drying.
{"title":"Influence of water on PE — SiO2 nanocomposites dielectric properties","authors":"H. Couderc, É. David, M. Frechette, A. Medjdoub","doi":"10.1109/CEIDP.2013.6748159","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748159","url":null,"abstract":"Polymers filled with inorganic nanoparticles have been extensively investigated in recent years because of their improved mechanical and electrical properties compared with the unfilled polymers. The most commonly used inorganic particles are oxides, particularly silica, because of their good properties and low cost. However, oxides have a hydrophilic nature, which leads to presence of water at the interface between particles and matrix. Due to the predominance of the particle-matrix interfaces in the case of nanocomposites, the presence of water in the interlayer region can become problematic. Moreover, the hydrophobic nature of most polymers, particularly polyolefins such as polyethylene, may make difficult the movement of this interfacial water. In this paper, dielectric spectroscopy was used during drying isothermal treatment at 80°C. The Maxwell - Wagner - Sillars relaxation peak sharpens and shifts to lower frequencies by three decades with time, translating into a modification of the interface between silica and polyethylene by drying.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128599003","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}
Pub Date : 2013-10-01DOI: 10.1109/CEIDP.2013.6748143
T. Ueno, Hirotaka Nakaya, M. Kozako, M. Hikita, T. Ikegami, T. Sakurai, H. Ogawa, T. Kisakibaru, S. Yamada, T. Yoshimitsu, T. Hirose, S. Hiroshima
The Inverter surge is a high-voltage phenomenon that is generated by the overlap returning wave by impedance mismatching to an inverter and load like cables and motors. The inverter has been available by advancement of control system of electrical instrument, such as the industrial motor. The increase of current changing rate with the advance of power semiconductor causes the surge voltage to rise, increasing the number of failure events. The evaluation technology by partial discharge (PD) measurement is important because the mechanism leading to breakdown by the inverter surge is a cause of PD. In this study, a repetitive impulse voltage generator has been developed which is used in detecting PD in the inverter surge. We report the result that repetitive impulse voltage was applied to confirm the insulation dignity of inverter-fed motor insulation using the repetitive impulse voltage generator.
{"title":"Evaluation of novel impulse voltage generator for detecting partial discharge","authors":"T. Ueno, Hirotaka Nakaya, M. Kozako, M. Hikita, T. Ikegami, T. Sakurai, H. Ogawa, T. Kisakibaru, S. Yamada, T. Yoshimitsu, T. Hirose, S. Hiroshima","doi":"10.1109/CEIDP.2013.6748143","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748143","url":null,"abstract":"The Inverter surge is a high-voltage phenomenon that is generated by the overlap returning wave by impedance mismatching to an inverter and load like cables and motors. The inverter has been available by advancement of control system of electrical instrument, such as the industrial motor. The increase of current changing rate with the advance of power semiconductor causes the surge voltage to rise, increasing the number of failure events. The evaluation technology by partial discharge (PD) measurement is important because the mechanism leading to breakdown by the inverter surge is a cause of PD. In this study, a repetitive impulse voltage generator has been developed which is used in detecting PD in the inverter surge. We report the result that repetitive impulse voltage was applied to confirm the insulation dignity of inverter-fed motor insulation using the repetitive impulse voltage generator.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"447 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123593759","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}
Pub Date : 2013-10-01DOI: 10.1109/CEIDP.2013.6748337
W. Xiaodong, Xu Tao, Lin Qin, Nan Jing
In order to provide a scientific reference for the constructions of AC transmission lines in high altitude areas, studying the contamination flashover performance of long string insulators at different altitude is necessary. In this paper, artificial pollution tests for double sheds porcelain insulator (XWP2-300) at simulated high altitude were performed in large artificial climate laboratory. Solid layer method was used and 50 % withstand voltage (U50%) were determined by the up-and-down method, then the flashover performance and the altitude correction factor of flashover voltage are obtained. The flashover performance of insulator at simulated high altitude is analyzed. It is shown that the relationship between U50% and SDD at different high altitudes can be expressed with the same equation, U50% as a function of insulator length is nonlinear when the length exceeds 5m, and U50% flashover strength is almost the same for different string configurations. The influences of SDD, insulator length, and string configuration on altitude correction factor were analysed. It is shown that altitude correction factor will be smaller with the increase of SDD, the altitude correction factors of different insulator length are approximately the same, and the value of exponent n for horizontal is smaller than that for I-String.
{"title":"Study on AC Contamination Performance and its Altitude Correction Factor of Long String Insulators","authors":"W. Xiaodong, Xu Tao, Lin Qin, Nan Jing","doi":"10.1109/CEIDP.2013.6748337","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748337","url":null,"abstract":"In order to provide a scientific reference for the constructions of AC transmission lines in high altitude areas, studying the contamination flashover performance of long string insulators at different altitude is necessary. In this paper, artificial pollution tests for double sheds porcelain insulator (XWP2-300) at simulated high altitude were performed in large artificial climate laboratory. Solid layer method was used and 50 % withstand voltage (U50%) were determined by the up-and-down method, then the flashover performance and the altitude correction factor of flashover voltage are obtained. The flashover performance of insulator at simulated high altitude is analyzed. It is shown that the relationship between U50% and SDD at different high altitudes can be expressed with the same equation, U50% as a function of insulator length is nonlinear when the length exceeds 5m, and U50% flashover strength is almost the same for different string configurations. The influences of SDD, insulator length, and string configuration on altitude correction factor were analysed. It is shown that altitude correction factor will be smaller with the increase of SDD, the altitude correction factors of different insulator length are approximately the same, and the value of exponent n for horizontal is smaller than that for I-String.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121360266","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}
Pub Date : 2013-10-01DOI: 10.1109/CEIDP.2013.6747106
L. Yawei, Z. Qiaogen, Yang Xiaolei, Zhou Jun, Yu Xinzhe
In order to research the extension processes of local arc on wet contaminated insulating surface under AC voltages, high speed camera was used to track the extension process, while, the voltage and leakage current waveforms were recorded by the measurement system. measurement systemObservationally, the extension process can be divided into two categories - The arc foot moving forward along the wet contaminated surface and the arc floating through air. In the case of applied voltage was low, the arc foot extension process was suppressed as the electric field ahead was limited. Arc length went on increasing as it was floating more seriously. When the applied voltage approach or reach flashover voltage, the fast extension of arc foot result in flashover rapidly, and the partial arc didn't had much time to float up. This also indicated that the extension of arc foot was only the result of arc propagation like arc floating instead of surface electric breakdown due to electric field concentration.
{"title":"Study on the extension process of AC local arc on wet contaminated insulating surface","authors":"L. Yawei, Z. Qiaogen, Yang Xiaolei, Zhou Jun, Yu Xinzhe","doi":"10.1109/CEIDP.2013.6747106","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747106","url":null,"abstract":"In order to research the extension processes of local arc on wet contaminated insulating surface under AC voltages, high speed camera was used to track the extension process, while, the voltage and leakage current waveforms were recorded by the measurement system. measurement systemObservationally, the extension process can be divided into two categories - The arc foot moving forward along the wet contaminated surface and the arc floating through air. In the case of applied voltage was low, the arc foot extension process was suppressed as the electric field ahead was limited. Arc length went on increasing as it was floating more seriously. When the applied voltage approach or reach flashover voltage, the fast extension of arc foot result in flashover rapidly, and the partial arc didn't had much time to float up. This also indicated that the extension of arc foot was only the result of arc propagation like arc floating instead of surface electric breakdown due to electric field concentration.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114534386","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}
Pub Date : 2013-10-01DOI: 10.1109/CEIDP.2013.6748175
Zhuo Ran, Tang Ju, Fan Lei, L. Yonggang, Z. Xiaoxing
In order to solve the problem of the optical method for detecting partial discharge (PD) in the electric equipment in quantity, the integral value of the signals from the optical method has been analyzed to reflect naturally the energy of light released by PD from the principle of the optical method, then a linear relationship between the integral value and the charge quantity of PD has been deduced to give a guidance to detect charge quantity of PD in Gas Insulated Switchgear (GIS). Afterwards, as the result of PD experiments on four typical insulation defects in GIS based on optical method coupled with impulse current method, the relationship between the average integral value of signal of the optical and the average apparent charge quantity presented linear. However, the relation curve of different defects might be distinct as the PD properties under different defects were distinct. Besides, the distance between two electrodes would also influent the linear relation. The longer the two electrodes separate, the greater the slope of the relation curve would be. Therefore, PD charge quantity might be calculated through optical signal when the defect type could be assured. Results all above shows that the type and level of PD could be determined using the optical method, hence the PD online monitoring and fault diagnosis based on the optical method is feasible.
{"title":"Study on relationship between optical signals and charge quantity of partial discharge under four typical insulation defects","authors":"Zhuo Ran, Tang Ju, Fan Lei, L. Yonggang, Z. Xiaoxing","doi":"10.1109/CEIDP.2013.6748175","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748175","url":null,"abstract":"In order to solve the problem of the optical method for detecting partial discharge (PD) in the electric equipment in quantity, the integral value of the signals from the optical method has been analyzed to reflect naturally the energy of light released by PD from the principle of the optical method, then a linear relationship between the integral value and the charge quantity of PD has been deduced to give a guidance to detect charge quantity of PD in Gas Insulated Switchgear (GIS). Afterwards, as the result of PD experiments on four typical insulation defects in GIS based on optical method coupled with impulse current method, the relationship between the average integral value of signal of the optical and the average apparent charge quantity presented linear. However, the relation curve of different defects might be distinct as the PD properties under different defects were distinct. Besides, the distance between two electrodes would also influent the linear relation. The longer the two electrodes separate, the greater the slope of the relation curve would be. Therefore, PD charge quantity might be calculated through optical signal when the defect type could be assured. Results all above shows that the type and level of PD could be determined using the optical method, hence the PD online monitoring and fault diagnosis based on the optical method is feasible.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116490092","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}
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