Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619870
D. Tehlar, U. Riechert, G. Behrmann, Markus Schraudolph
Top quality high voltage pre-test of solid insulating material requires long test intervals because the initiation of partial discharge (PD) in voids not only demands a sufficiently high electric field, but also the availability of a start electron. The latter leads to a statistical distribution of the time to PD inception, such that long test intervals are required to rule out the presence of voids. This makes 100% screening economically infeasible. However, if the PD is activated using ionizing radiation, the necessary test interval can be reduced to a minimum, without risking that small voids will be missed. It has already been shown that pulsed X-rays are able to trigger PD in voids and not affect the measured PD magnitude. Based on this method, known as Pulsed X-ray Induced Partial Discharge (PXIPD), a test stand for routine testing of insulators up to 420 kV has been developed and put into commercial operation. A very low measurement noise level permits an automatic analysis of the results. Already more than 20,000 insulators for installation in GIS have been screened using this PXIPD method on an industrial scale. Investigation of insulators with natural defects demonstrates the effectiveness and reliability of this new system. In combination with the short test cycle time and the ability to unambiguously link PD to a specific insulator the system allows for a leaner GIS production.
{"title":"Test stand for high voltage insulator partial discharge testing with ultra short X-ray pulses","authors":"D. Tehlar, U. Riechert, G. Behrmann, Markus Schraudolph","doi":"10.1109/ICSD.2013.6619870","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619870","url":null,"abstract":"Top quality high voltage pre-test of solid insulating material requires long test intervals because the initiation of partial discharge (PD) in voids not only demands a sufficiently high electric field, but also the availability of a start electron. The latter leads to a statistical distribution of the time to PD inception, such that long test intervals are required to rule out the presence of voids. This makes 100% screening economically infeasible. However, if the PD is activated using ionizing radiation, the necessary test interval can be reduced to a minimum, without risking that small voids will be missed. It has already been shown that pulsed X-rays are able to trigger PD in voids and not affect the measured PD magnitude. Based on this method, known as Pulsed X-ray Induced Partial Discharge (PXIPD), a test stand for routine testing of insulators up to 420 kV has been developed and put into commercial operation. A very low measurement noise level permits an automatic analysis of the results. Already more than 20,000 insulators for installation in GIS have been screened using this PXIPD method on an industrial scale. Investigation of insulators with natural defects demonstrates the effectiveness and reliability of this new system. In combination with the short test cycle time and the ability to unambiguously link PD to a specific insulator the system allows for a leaner GIS production.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123120635","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 : 2013-10-08DOI: 10.1109/ICSD.2013.6619690
Xingyi Huang, Fei Liu, P. Jiang, Toshikatsu Tanaka
Graphene and graphene oxide are increasingly attracting worldwide attention from academia and industry. The physical properties of graphene have been documented recently, and we have known that the sea of electrons in the two-dimensional, single layer of sp2 hybridized carbon atoms causes graphene to act both as electrical and thermal conductors. In contrast, graphene oxide, an oxidized graphene sheet with carboxylic acid at the edges and phenol hydroxyl and epoxide groups on the basal plane, is generally considered to be an insulating material. Is graphene oxide is an insulating material? This work tries to answer this question by measuring the temperature-dependent electrical property of graphene oxide paper by using a broadband dielectric spectroscopy.
{"title":"Is graphene oxide an insulating material?","authors":"Xingyi Huang, Fei Liu, P. Jiang, Toshikatsu Tanaka","doi":"10.1109/ICSD.2013.6619690","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619690","url":null,"abstract":"Graphene and graphene oxide are increasingly attracting worldwide attention from academia and industry. The physical properties of graphene have been documented recently, and we have known that the sea of electrons in the two-dimensional, single layer of sp2 hybridized carbon atoms causes graphene to act both as electrical and thermal conductors. In contrast, graphene oxide, an oxidized graphene sheet with carboxylic acid at the edges and phenol hydroxyl and epoxide groups on the basal plane, is generally considered to be an insulating material. Is graphene oxide is an insulating material? This work tries to answer this question by measuring the temperature-dependent electrical property of graphene oxide paper by using a broadband dielectric spectroscopy.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121720701","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 : 2013-10-08DOI: 10.1109/ICSD.2013.6619756
T. A. Ve, F. Mauseth, E. Ildstad
Space charge accumulation in extruded DC cable insulation can cause local electric field enhancement. For subsea cables with polymeric or damaged metallic water barriers, water will migrate into the insulation system. As high water content has been found to increase conductivity, absorbed water is expected to affect the transport and accumulation of charge in XLPE. This paper presents results from pulsed electro-acoustic measurements of space charge accumulation in XLPE insulation with low and high water content. The water content in the samples was controlled by a climate chamber, allowing the water content to vary in the range of 5-95 ppm. The measurements were performed at 20, 40 and 60 °C, with an applied DC voltage of 10 kV. The DC voltage was switched off during the measurements. The results show that increased water content at 20 °C leads to formation of positive hetero space charge near the cathode, while for the dry samples homocharge formed at both electrodes. At higher temperatures, increased water content decreased the magnitude of accumulated charge in the wet samples compared to the dry samples. Both high- and low water content samples showed accumulation of positive charge at both the anode and the cathode. The results could partly be explained by conductivity increasing with increasing water content, but also showed evidence of additional mechanisms occurring.
{"title":"Space charge accumulation in XLPE insulation at high temperature and water content","authors":"T. A. Ve, F. Mauseth, E. Ildstad","doi":"10.1109/ICSD.2013.6619756","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619756","url":null,"abstract":"Space charge accumulation in extruded DC cable insulation can cause local electric field enhancement. For subsea cables with polymeric or damaged metallic water barriers, water will migrate into the insulation system. As high water content has been found to increase conductivity, absorbed water is expected to affect the transport and accumulation of charge in XLPE. This paper presents results from pulsed electro-acoustic measurements of space charge accumulation in XLPE insulation with low and high water content. The water content in the samples was controlled by a climate chamber, allowing the water content to vary in the range of 5-95 ppm. The measurements were performed at 20, 40 and 60 °C, with an applied DC voltage of 10 kV. The DC voltage was switched off during the measurements. The results show that increased water content at 20 °C leads to formation of positive hetero space charge near the cathode, while for the dry samples homocharge formed at both electrodes. At higher temperatures, increased water content decreased the magnitude of accumulated charge in the wet samples compared to the dry samples. Both high- and low water content samples showed accumulation of positive charge at both the anode and the cathode. The results could partly be explained by conductivity increasing with increasing water content, but also showed evidence of additional mechanisms occurring.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121385685","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 : 2013-10-08DOI: 10.1109/ICSD.2013.6619783
Liyuan Xie, Yanhui Huang, Fei Liu, Xingyi Huang, P. Jiang
Barium titanate@ poly (methyl methacrylate) (BT@PMMA) nanocomposites were prepared via in situ atom transfer radical polymerization (ATRP). It was observed that the BT nanoparticles were coated with PMMA and excellently dispersed in the polymer matrix. Compared with the BT/PMMA nanocomposites prepared by the traditional solution blending, BT@PMMA nanocomposites show higher thermal conductivity and lower dielectric loss. The result is attributed to the strong interfacial bonding between the BT nanoparticles and the PMMA matrix.
{"title":"Comparative investigation on dielectric property and thermal conductivity of in situ polymerized and solution mixed polymer nanocoposites","authors":"Liyuan Xie, Yanhui Huang, Fei Liu, Xingyi Huang, P. Jiang","doi":"10.1109/ICSD.2013.6619783","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619783","url":null,"abstract":"Barium titanate@ poly (methyl methacrylate) (BT@PMMA) nanocomposites were prepared via in situ atom transfer radical polymerization (ATRP). It was observed that the BT nanoparticles were coated with PMMA and excellently dispersed in the polymer matrix. Compared with the BT/PMMA nanocomposites prepared by the traditional solution blending, BT@PMMA nanocomposites show higher thermal conductivity and lower dielectric loss. The result is attributed to the strong interfacial bonding between the BT nanoparticles and the PMMA matrix.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122625075","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 : 2013-10-08DOI: 10.1109/ICSD.2013.6619904
Naiyi Li, Tianxi Xie, Zongren Peng, Shiling Zhang
Corona test is necessary for verifying the validity of grading ring design for insulators on ac transmission lines. But there seems a lack of standards about simulation test method for ultra-high voltage (UHV) power fittings, such as grading ring for insulators. This paper describes a test approach that specifically applies to grading ring for UHV insulators. First, based on finite-element (FE) calculation, a gradient equivalent coefficient which reflects difference of electric stresses acting on surface of grading rings mounted on different sites is determined. Next, refer to IEC and national standard, an available test voltage is corrected by previous coefficient considering interactions of three-dimensional environment. Finally, the corona test of a type of grading ring for UHV suspension composite insulators is performed using above method as an example. This method shows good effect by field observation on tangent towers with an ultraviolet camera and the tested grading rings have been applied in the UHV pilot project in China successfully.
{"title":"Corona test of grading ring for UHV insulators using gradient equivalent method","authors":"Naiyi Li, Tianxi Xie, Zongren Peng, Shiling Zhang","doi":"10.1109/ICSD.2013.6619904","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619904","url":null,"abstract":"Corona test is necessary for verifying the validity of grading ring design for insulators on ac transmission lines. But there seems a lack of standards about simulation test method for ultra-high voltage (UHV) power fittings, such as grading ring for insulators. This paper describes a test approach that specifically applies to grading ring for UHV insulators. First, based on finite-element (FE) calculation, a gradient equivalent coefficient which reflects difference of electric stresses acting on surface of grading rings mounted on different sites is determined. Next, refer to IEC and national standard, an available test voltage is corrected by previous coefficient considering interactions of three-dimensional environment. Finally, the corona test of a type of grading ring for UHV suspension composite insulators is performed using above method as an example. This method shows good effect by field observation on tangent towers with an ultraviolet camera and the tested grading rings have been applied in the UHV pilot project in China successfully.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122754073","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 : 2013-10-08DOI: 10.1109/ICSD.2013.6619768
I. Tsekmes, D. van der Born, P. Morshuis, J. J. Smit, T. J. Person, S. J. Sutton
Polymeric cables operating under high voltage direct current (HVDC), suffer from space charge accumulation and may exhibit a relatively low depletion rate of accumulated charges when the external field is removed. Increasing the reliability of polymeric dc cables is of crucial importance. The development of new polymeric materials with improved performance under dc electrical stresses requires a thorough investigation of the properties governing charge injection, transport and trapping. In this research, the space charge accumulation thresholds of three different polymeric dc minicables are examined with the use of space charge and conduction current measurements.
{"title":"Space charge accumulation in polymeric DC mini-cables","authors":"I. Tsekmes, D. van der Born, P. Morshuis, J. J. Smit, T. J. Person, S. J. Sutton","doi":"10.1109/ICSD.2013.6619768","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619768","url":null,"abstract":"Polymeric cables operating under high voltage direct current (HVDC), suffer from space charge accumulation and may exhibit a relatively low depletion rate of accumulated charges when the external field is removed. Increasing the reliability of polymeric dc cables is of crucial importance. The development of new polymeric materials with improved performance under dc electrical stresses requires a thorough investigation of the properties governing charge injection, transport and trapping. In this research, the space charge accumulation thresholds of three different polymeric dc minicables are examined with the use of space charge and conduction current measurements.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"155-156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122911761","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 : 2013-10-08DOI: 10.1109/ICSD.2013.6619830
M. Yoshiura, F. Yoshida
The development of the dye-sensitized solar cell (DSC) has been expected to supply another solar cell other than the silicon solar cells, for its convenient production processes. The nano-porous titanium oxide (TiO2) layer, photo-electrode of DSC, is constructed on a F-doped SnO2 transparent electrode(FTO), before the dye deposition. The structure of the porous TiO2 layer, such as the existence of charge traps, seems to influence the photoelectric conversion efficiency of DSC. The possibility of estimating the photo-electrode efficiency by the charge trap structure was studied with thermally stimulated current (TSC) measurement. As a result of the TSC measurement, four charge traps were detected in the electrode and were evaluated the energy trap depths of 0.07 eV, 0.138 eV, 0.385 eV and 0.381 eV. The escape frequency factors were also evaluated in large span from 10 s-1 to 108 s-1.
{"title":"Evaluation of defect levels formed in the nano-porous titanium oxide layer of dye-sensitized solar cell","authors":"M. Yoshiura, F. Yoshida","doi":"10.1109/ICSD.2013.6619830","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619830","url":null,"abstract":"The development of the dye-sensitized solar cell (DSC) has been expected to supply another solar cell other than the silicon solar cells, for its convenient production processes. The nano-porous titanium oxide (TiO2) layer, photo-electrode of DSC, is constructed on a F-doped SnO2 transparent electrode(FTO), before the dye deposition. The structure of the porous TiO2 layer, such as the existence of charge traps, seems to influence the photoelectric conversion efficiency of DSC. The possibility of estimating the photo-electrode efficiency by the charge trap structure was studied with thermally stimulated current (TSC) measurement. As a result of the TSC measurement, four charge traps were detected in the electrode and were evaluated the energy trap depths of 0.07 eV, 0.138 eV, 0.385 eV and 0.381 eV. The escape frequency factors were also evaluated in large span from 10 s-1 to 108 s-1.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125136551","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 : 2013-10-08DOI: 10.1109/ICSD.2013.6619840
A. Kahouli, O. Gallot-Lavallée, P. Rain, O. Lesaint, C. Guillermin, J. Lupin
The dielectric properties of two grades of Bi-oriented isotactic polypropylene (BOiPP) are studied, using a variety of techniques: breakdown field measurements, dielectric spectroscopy, thermally stimulated depolarization currents, dc conduction currents. Standard (STPP) and high-crystallinity (HCPP) polypropylene films are investigated. Measurements are carried out over a wide temperature range, up to (-150°C/ +125°C). Breakdown field in both materials show a very small difference. On the other hand, dielectric losses and dc conduction currents are significantly lower in HCPP. Both materials show a decrease of dielectric losses versus temperature in the range (20-90°C), favorable for the application to ac power capacitors. The analysis of dc currents allows to evidence two main conduction mechanisms: (i) below 80°C in both materials, a hopping mechanism due to motion of electrons occurring in the amorphous phase; (ii) above 80°C, an ionic conduction in HCPP and a hopping conduction in STPP.
{"title":"A comparison of electric and dielectric properties of standard and high-crystallinity polypropylene films","authors":"A. Kahouli, O. Gallot-Lavallée, P. Rain, O. Lesaint, C. Guillermin, J. Lupin","doi":"10.1109/ICSD.2013.6619840","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619840","url":null,"abstract":"The dielectric properties of two grades of Bi-oriented isotactic polypropylene (BOiPP) are studied, using a variety of techniques: breakdown field measurements, dielectric spectroscopy, thermally stimulated depolarization currents, dc conduction currents. Standard (STPP) and high-crystallinity (HCPP) polypropylene films are investigated. Measurements are carried out over a wide temperature range, up to (-150°C/ +125°C). Breakdown field in both materials show a very small difference. On the other hand, dielectric losses and dc conduction currents are significantly lower in HCPP. Both materials show a decrease of dielectric losses versus temperature in the range (20-90°C), favorable for the application to ac power capacitors. The analysis of dc currents allows to evidence two main conduction mechanisms: (i) below 80°C in both materials, a hopping mechanism due to motion of electrons occurring in the amorphous phase; (ii) above 80°C, an ionic conduction in HCPP and a hopping conduction in STPP.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129667144","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 : 2013-10-08DOI: 10.1109/ICSD.2013.6619673
L. Zeghichi, L. Mokhnache, M. Djebabra
The aim of this work is to present the contribution of the Monte Carlo Method to simulate the basic phenomena in an electrical discharge, taking into account the different processes of atomic collisions (elastic or inelastic), in the case of oxygene and in a plan-plan system. Results have been compared with modelisation results to verify the breakdown criteria. The determination of the ambient electrical field depends on distributions of charged particles; by solving the Maxwell equations we get the resulting radial field.
{"title":"The Monte Carlo Method for the study of an electrical discharge","authors":"L. Zeghichi, L. Mokhnache, M. Djebabra","doi":"10.1109/ICSD.2013.6619673","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619673","url":null,"abstract":"The aim of this work is to present the contribution of the Monte Carlo Method to simulate the basic phenomena in an electrical discharge, taking into account the different processes of atomic collisions (elastic or inelastic), in the case of oxygene and in a plan-plan system. Results have been compared with modelisation results to verify the breakdown criteria. The determination of the ambient electrical field depends on distributions of charged particles; by solving the Maxwell equations we get the resulting radial field.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129754009","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 : 2013-10-08DOI: 10.1109/ICSD.2013.6619672
K. Zhou, Xiantao Tao, Wenbiao Tao
In order to understand the role of titanium isopropoxide (TIPT) catalyst on insulation rejuvenation for water tree aged cables, dielectric properties and micro structure changes are investigated for the rejuvenated cables. Needle-shape defects are made inside cross-linked polyethylene (XLPE) cable samples to form water tree in the XLPE layer. The water tree aged samples are injected by the liquid with phenylmethyldimethoxy silane (PMDMS) catalyzed by TIPT for rejuvenation, and the breakdown voltage of the rejuvenated samples is significantly higher than that of the new samples. By the observation of scanning electronic microscope (SEM), the nano-TiO2 particles are observed inside the breakdown channels of the rejuvenated samples. Accordingly, the insulation performance of rejuvenated samples is significantly enhanced by the nano-TiO2 particles. Through analyzing the products of hydrolysis from TIPT, the nano-scale TiO2 particles are observed, and its micro-morphology is consistent with that observed inside the breakdown channels. According to the observation, the insulation enhancement mechanism is described. Therefore, the dielectric property of the rejuvenated cables is improved due to the nano-TiO2 produced by the hydrolysis from TIPT.
{"title":"Effect of TIPT catalyst on insulation rejuvenation of water-tree aged cables","authors":"K. Zhou, Xiantao Tao, Wenbiao Tao","doi":"10.1109/ICSD.2013.6619672","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619672","url":null,"abstract":"In order to understand the role of titanium isopropoxide (TIPT) catalyst on insulation rejuvenation for water tree aged cables, dielectric properties and micro structure changes are investigated for the rejuvenated cables. Needle-shape defects are made inside cross-linked polyethylene (XLPE) cable samples to form water tree in the XLPE layer. The water tree aged samples are injected by the liquid with phenylmethyldimethoxy silane (PMDMS) catalyzed by TIPT for rejuvenation, and the breakdown voltage of the rejuvenated samples is significantly higher than that of the new samples. By the observation of scanning electronic microscope (SEM), the nano-TiO2 particles are observed inside the breakdown channels of the rejuvenated samples. Accordingly, the insulation performance of rejuvenated samples is significantly enhanced by the nano-TiO2 particles. Through analyzing the products of hydrolysis from TIPT, the nano-scale TiO2 particles are observed, and its micro-morphology is consistent with that observed inside the breakdown channels. According to the observation, the insulation enhancement mechanism is described. Therefore, the dielectric property of the rejuvenated cables is improved due to the nano-TiO2 produced by the hydrolysis from TIPT.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"287 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124575219","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：