Pub Date : 2013-10-20DOI: 10.1109/CEIDP.2013.6747070
M. Pattouras, A. Tzimas, S. Rowland
This study investigates the effect of barriers and interfaces on the lifetime of epoxy resin samples, as well as the growth characteristics of electrical trees. Four sample types are presented; all having been prepared in the point-plane configuration using a hypodermic needle as the HV electrode. Tests were carried out at 13 kV rms and sample images were taken at fixed one minute intervals during the test period. Results show that the incorporation of a barrier improves the time to breakdown of the epoxy resin tested. The inclusion of a major void defect did not accelerate failure of a sample which included an effective barrier.
{"title":"The effect of material interfaces on electrical tree growth and breakdown time of epoxy resin","authors":"M. Pattouras, A. Tzimas, S. Rowland","doi":"10.1109/CEIDP.2013.6747070","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747070","url":null,"abstract":"This study investigates the effect of barriers and interfaces on the lifetime of epoxy resin samples, as well as the growth characteristics of electrical trees. Four sample types are presented; all having been prepared in the point-plane configuration using a hypodermic needle as the HV electrode. Tests were carried out at 13 kV rms and sample images were taken at fixed one minute intervals during the test period. Results show that the incorporation of a barrier improves the time to breakdown of the epoxy resin tested. The inclusion of a major void defect did not accelerate failure of a sample which included an effective barrier.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127976551","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 : 2013-10-20DOI: 10.1109/CEIDP.2013.6747431
T. Andritsch, R. Kochetov, P. Morshuis, J. Smit, A. Vaughan
Polymer nanocomposites exhibit a number of desirable dielectric properties, like increased resistance to partial discharge, electrical treeing, dc breakdown strength, or a decreased intake of space charges. The permittivity is one of the properties at which a direct impact from the introduction of nanoparticles can be observed. Many applications would benefit from the ability to tailor the permittivity of their insulation. Both a reduction, for e.g. cable systems and GIS spacers, and an increase, for e.g. capacitors, would be desirable if they can be controlled and exploited accordingly. Hence there is an interest in predicting how a filler material would alter the permittivity. There are two main groups of theoretical approaches to the problem of composite permittivities. Effective medium theories, which utilize average fields or polarizabilities and induced dipole moments, and integral methods, which use low concentration formulae and integrate them to higher concentration. When modeling the permittivity of nanocomposites both methods struggle to deliver satisfying results. This exploratory work tries to make estimations about the bulk permittivity by taking into account the host-polymer interface, to which many of the astounding properties of polymer nanocomposites are ascribed. As a starting point for the modeling, nanocomposites are considered which are based on bisphenol-A type epoxy resin with aluminum oxide and magnesium oxide nanofiller. The selected filler materials are spherical or quasi-spherical, to minimize the influence of additional parameters like the aspect ratio.
{"title":"Modeling of the permittivity of epoxy nanocomposites","authors":"T. Andritsch, R. Kochetov, P. Morshuis, J. Smit, A. Vaughan","doi":"10.1109/CEIDP.2013.6747431","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747431","url":null,"abstract":"Polymer nanocomposites exhibit a number of desirable dielectric properties, like increased resistance to partial discharge, electrical treeing, dc breakdown strength, or a decreased intake of space charges. The permittivity is one of the properties at which a direct impact from the introduction of nanoparticles can be observed. Many applications would benefit from the ability to tailor the permittivity of their insulation. Both a reduction, for e.g. cable systems and GIS spacers, and an increase, for e.g. capacitors, would be desirable if they can be controlled and exploited accordingly. Hence there is an interest in predicting how a filler material would alter the permittivity. There are two main groups of theoretical approaches to the problem of composite permittivities. Effective medium theories, which utilize average fields or polarizabilities and induced dipole moments, and integral methods, which use low concentration formulae and integrate them to higher concentration. When modeling the permittivity of nanocomposites both methods struggle to deliver satisfying results. This exploratory work tries to make estimations about the bulk permittivity by taking into account the host-polymer interface, to which many of the astounding properties of polymer nanocomposites are ascribed. As a starting point for the modeling, nanocomposites are considered which are based on bisphenol-A type epoxy resin with aluminum oxide and magnesium oxide nanofiller. The selected filler materials are spherical or quasi-spherical, to minimize the influence of additional parameters like the aspect ratio.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"98 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115506667","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 : 2013-10-20DOI: 10.1109/CEIDP.2013.6747071
P. Amaro, M. Facciotti, A. Holt, J. Pilgrim, P. Lewin, R. C. Brown, G. Wilson, P. Jarman
Corrosive sulfur in the last decade has been recognized as a major risk to high voltage transformers. An initial study undertaken by CIGRE on copper sulfide in transformer insulation investigated possible sources, i.e. Dibenzyl Disulfide (DBDS), it also looked at possible mitigating techniques, i.e. passivation, environmental influences, i.e. temperature, and improvement to oil corrosion standards, i.e. EN 62535. Although there was significant volume of research undertaken the high voltage industry still felt there is a lack of understanding in the process of copper sulfide formation and long-term effects of mitigation techniques. Hence a new CIGRE transformer working group, A2.40, was created. The identification of techniques with the ability to track the mechanism of copper sulfide (Cu2S) formation is fundamental to the current research objectives. The technique suggested in this paper involves the use of X-ray fluorescence (XRF), which is used for elemental analysis, to track the quantity of sulfur in the oil. As the deposits of Cu2S form in the conductors and paper insulation the amount of sulfur in the oil decreases. By using a series of laboratory experiments is possible to investigate how the rate of formation of Cu2S changes with time, suggesting that there is an initial chemical reaction needed for the Cu2S deposits to form. Scanning Electron Microscopy with Energy-dispersive X-ray spectroscopy (SEM-EDX) has been used to investigate the surface of copper at several different stages of the copper sulfide formation. By manipulating variables, i.e. temperature, it is possible to map their influence and provide a more precise risk assessment of transformer with corrosive oil to electrical utility companies. The experimental results suggest the possibility of developing a method to indirectly measure Cu2S deposition on conductors and insulation paper by tracking sulfur concentration changes in the transformer oil.
{"title":"Tracking copper sulfide formation in corrosive transformer oil","authors":"P. Amaro, M. Facciotti, A. Holt, J. Pilgrim, P. Lewin, R. C. Brown, G. Wilson, P. Jarman","doi":"10.1109/CEIDP.2013.6747071","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747071","url":null,"abstract":"Corrosive sulfur in the last decade has been recognized as a major risk to high voltage transformers. An initial study undertaken by CIGRE on copper sulfide in transformer insulation investigated possible sources, i.e. Dibenzyl Disulfide (DBDS), it also looked at possible mitigating techniques, i.e. passivation, environmental influences, i.e. temperature, and improvement to oil corrosion standards, i.e. EN 62535. Although there was significant volume of research undertaken the high voltage industry still felt there is a lack of understanding in the process of copper sulfide formation and long-term effects of mitigation techniques. Hence a new CIGRE transformer working group, A2.40, was created. The identification of techniques with the ability to track the mechanism of copper sulfide (Cu2S) formation is fundamental to the current research objectives. The technique suggested in this paper involves the use of X-ray fluorescence (XRF), which is used for elemental analysis, to track the quantity of sulfur in the oil. As the deposits of Cu2S form in the conductors and paper insulation the amount of sulfur in the oil decreases. By using a series of laboratory experiments is possible to investigate how the rate of formation of Cu2S changes with time, suggesting that there is an initial chemical reaction needed for the Cu2S deposits to form. Scanning Electron Microscopy with Energy-dispersive X-ray spectroscopy (SEM-EDX) has been used to investigate the surface of copper at several different stages of the copper sulfide formation. By manipulating variables, i.e. temperature, it is possible to map their influence and provide a more precise risk assessment of transformer with corrosive oil to electrical utility companies. The experimental results suggest the possibility of developing a method to indirectly measure Cu2S deposition on conductors and insulation paper by tracking sulfur concentration changes in the transformer oil.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132151568","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 : 2013-10-20DOI: 10.1109/CEIDP.2013.6747439
M. Facciotti, A. Holt, A. Amaro, R. C. Brown, P. Lewin, G. Wilson, P. Jarman
Corrosion of copper conductors in mineral oil insulated power transformers is a well-known problem in electrical power management and distribution worldwide. Recently, some corrosive compounds containing sulfur (e.g. DBDS, dibenzyl disulfide) have been identified to play an important role in this process. A common strategy to limit corrosion, either as precaution or remedy, is the addition of a passivator (Irgamet 39™, I39™) in the oil, with a recommended concentration of 100 ppm to protect the surface of conductors from chemical attack from corrosive oil components. In this study, samples of naturally non-corrosive oil with different concentrations of I39™ are used to treat copper surfaces that are aged under inert atmosphere and analyzed with X-ray Photoelectron (XPS) to assess directly the effective amount of passivator covering the surface of metal and its dependence on the original concentration in oil. The main aim is, therefore, to determine the effect of the concentration of I39™ originally in oil on the effective surface coverage of copper conductors to observe its distribution and to verify the recommended passivator concentration to be used.
{"title":"XPS study on direct detection of passivator Irgamet 39™ on copper surfaces aged in insulating mineral oil","authors":"M. Facciotti, A. Holt, A. Amaro, R. C. Brown, P. Lewin, G. Wilson, P. Jarman","doi":"10.1109/CEIDP.2013.6747439","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747439","url":null,"abstract":"Corrosion of copper conductors in mineral oil insulated power transformers is a well-known problem in electrical power management and distribution worldwide. Recently, some corrosive compounds containing sulfur (e.g. DBDS, dibenzyl disulfide) have been identified to play an important role in this process. A common strategy to limit corrosion, either as precaution or remedy, is the addition of a passivator (Irgamet 39™, I39™) in the oil, with a recommended concentration of 100 ppm to protect the surface of conductors from chemical attack from corrosive oil components. In this study, samples of naturally non-corrosive oil with different concentrations of I39™ are used to treat copper surfaces that are aged under inert atmosphere and analyzed with X-ray Photoelectron (XPS) to assess directly the effective amount of passivator covering the surface of metal and its dependence on the original concentration in oil. The main aim is, therefore, to determine the effect of the concentration of I39™ originally in oil on the effective surface coverage of copper conductors to observe its distribution and to verify the recommended passivator concentration to be used.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126484264","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.2013.6748210
W. Liu, Y. Fu, X. Zou, X. Wang
It is well known that the modification of insulator surface electric field contributes significantly to the surface flashover in vacuum. For the purpose of studying the surface electric field, an on-line measurement system based on Kerr electro-optical effect is developed. And the preliminary experiments are performed, in which a modified surface field is observed when insulator is being stressed by a HV nanosecond square pulse.
{"title":"An electro-optical measurement on electric field of insulator surface under HV pulse in vacuum","authors":"W. Liu, Y. Fu, X. Zou, X. Wang","doi":"10.1109/CEIDP.2013.6748210","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748210","url":null,"abstract":"It is well known that the modification of insulator surface electric field contributes significantly to the surface flashover in vacuum. For the purpose of studying the surface electric field, an on-line measurement system based on Kerr electro-optical effect is developed. And the preliminary experiments are performed, in which a modified surface field is observed when insulator is being stressed by a HV nanosecond square pulse.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"17 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":"117224953","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.2013.6748236
Daochun Huang, Zheng Zheng, Z. Huang, Xiongjie Xie, J. Ruan, F. Huo
In order to give reference for the study of 1000kV ultra high voltage (UHV) AC compact transmission line grading ring design and corona characteristics, based on the 1000kV UHV AC compact transmission line pre-designed parameters, 3D electrostatic field finite element numerical analysis whole model to calculate the electric field distribution of composite insulator and grading ring was built, and the influence of pipe diameter, ring diameter, installation position and small grading ring to the maximum electric field strength on the surface of the grading ring was analyzed. Based on the numerical analysis results, four kinds of grading rings with different parameters were preliminary selected for true type test. 3D electrostatic field finite element model according to the corona test arrangement was built, the electric field of four kinds of grading rings were analyzed and compared with the whole model, and the correction coefficients were obtained between the whole model and corona testing simulation model. The research results can be a reference for the optimization design and following corona characteristics test parameters correction for 1000kV AC compact transmission line grading rings.
{"title":"Study on parameters design and corona characteristics test equivalent of grading rings for 1000kV UHV AC compact transmission line","authors":"Daochun Huang, Zheng Zheng, Z. Huang, Xiongjie Xie, J. Ruan, F. Huo","doi":"10.1109/CEIDP.2013.6748236","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748236","url":null,"abstract":"In order to give reference for the study of 1000kV ultra high voltage (UHV) AC compact transmission line grading ring design and corona characteristics, based on the 1000kV UHV AC compact transmission line pre-designed parameters, 3D electrostatic field finite element numerical analysis whole model to calculate the electric field distribution of composite insulator and grading ring was built, and the influence of pipe diameter, ring diameter, installation position and small grading ring to the maximum electric field strength on the surface of the grading ring was analyzed. Based on the numerical analysis results, four kinds of grading rings with different parameters were preliminary selected for true type test. 3D electrostatic field finite element model according to the corona test arrangement was built, the electric field of four kinds of grading rings were analyzed and compared with the whole model, and the correction coefficients were obtained between the whole model and corona testing simulation model. The research results can be a reference for the optimization design and following corona characteristics test parameters correction for 1000kV AC compact transmission line grading rings.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"30 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":"121116604","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.2013.6748163
Sen Wang, Bo Niu, Li-zhu He, Hua Hui, Zhizhong Li, Bin Zhu
In power grid, higher is the voltage level, longer is the composite insulator string, uneven is the potential distribution, especially the sheds near the conductor, its withstand voltage is several times higher than other sheds. For the electric field strength of composite insulator at high end is high, it is easy to produce corona which resulted in insulator degradation, life shortening and acid corrosion intensified by electric corrosion. A new interpolation electrode structure equipped with optimized grading ring is designed and developed to effectively improve potential distribution of composite insulator. Based on fuzzy clustering analysis method, the test data of 330kV composite insulator with different structures is analyzed and modeled. Field strength distribution function of composite insulator with different structure has obtained. Through field strength analysis, it is proposed to introduce the potential into 1~2 sheds of composite insulator core rod for reducing field strength at high end. Based on above method, a new interpolation electrode structure is designed; optimal design is conducted to grading ring of interpolation electrode structure through finite element algorithm simulation. The product has passed all type tests. Field strength and potential distribution of insulator shed are measured by fiber optic field strength measuring instrument. It is shown that the potential distribution of composite insulator has been improved greatly. The product has been applied and operated on a 330kV transmission line in Shaanxi Province for 3 years, and is under good operation condition.
{"title":"Study on improving the operation performance of composite insulator by interpolation electrode structure","authors":"Sen Wang, Bo Niu, Li-zhu He, Hua Hui, Zhizhong Li, Bin Zhu","doi":"10.1109/CEIDP.2013.6748163","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748163","url":null,"abstract":"In power grid, higher is the voltage level, longer is the composite insulator string, uneven is the potential distribution, especially the sheds near the conductor, its withstand voltage is several times higher than other sheds. For the electric field strength of composite insulator at high end is high, it is easy to produce corona which resulted in insulator degradation, life shortening and acid corrosion intensified by electric corrosion. A new interpolation electrode structure equipped with optimized grading ring is designed and developed to effectively improve potential distribution of composite insulator. Based on fuzzy clustering analysis method, the test data of 330kV composite insulator with different structures is analyzed and modeled. Field strength distribution function of composite insulator with different structure has obtained. Through field strength analysis, it is proposed to introduce the potential into 1~2 sheds of composite insulator core rod for reducing field strength at high end. Based on above method, a new interpolation electrode structure is designed; optimal design is conducted to grading ring of interpolation electrode structure through finite element algorithm simulation. The product has passed all type tests. Field strength and potential distribution of insulator shed are measured by fiber optic field strength measuring instrument. It is shown that the potential distribution of composite insulator has been improved greatly. The product has been applied and operated on a 330kV transmission line in Shaanxi Province for 3 years, and is under good operation condition.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"11 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":"124701511","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.2013.6748317
T. Wakimoto, H. Kojima, M. Hanai, N. Hayakawa
In recent years, the miniaturization and greater power output of motors for EVs and HEVs have led to the higher drive voltages and the increased adoption of rectangular wire in coils (higher volume ratio). In order to ensure that the motor is electrically insulated, it is necessary to restrict partial discharges between coil wires, and to do this, it is important to reduce the potential difference between wires resulting from the operation of the inverter and to ensure that the coil wire has the proper coating thickness. However, the measurement of partial discharges between wires results in variability in the measured values depending on the environment and methods, which is a problem for the stringently controlled design of motor insulation. To clarify the factors affecting the partial discharge inception voltage (PDIV) between wires as well as the mechanism, the effect of ambient humidity, pre-discharge conditions on the PDIV between wires was analyzed using rectangular wire with a coating thickness of 40 μm and 160 μm. As a result, it was confirmed that when a pre-discharge is performed in a high-humidity environment, transient characteristics were displayed in which PDIV momentarily decreased and then increased. We performed discharge observations and electric field analysis. The results showed that in high-humidity environments, the pre-discharge causes moisture to adhere to the coating surface, resulting in the increase in surface conductivity, which influences the electric field strength in the air gap.
{"title":"Transition of partial discharge inception voltage under high humidity for enameled rectangular wires","authors":"T. Wakimoto, H. Kojima, M. Hanai, N. Hayakawa","doi":"10.1109/CEIDP.2013.6748317","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748317","url":null,"abstract":"In recent years, the miniaturization and greater power output of motors for EVs and HEVs have led to the higher drive voltages and the increased adoption of rectangular wire in coils (higher volume ratio). In order to ensure that the motor is electrically insulated, it is necessary to restrict partial discharges between coil wires, and to do this, it is important to reduce the potential difference between wires resulting from the operation of the inverter and to ensure that the coil wire has the proper coating thickness. However, the measurement of partial discharges between wires results in variability in the measured values depending on the environment and methods, which is a problem for the stringently controlled design of motor insulation. To clarify the factors affecting the partial discharge inception voltage (PDIV) between wires as well as the mechanism, the effect of ambient humidity, pre-discharge conditions on the PDIV between wires was analyzed using rectangular wire with a coating thickness of 40 μm and 160 μm. As a result, it was confirmed that when a pre-discharge is performed in a high-humidity environment, transient characteristics were displayed in which PDIV momentarily decreased and then increased. We performed discharge observations and electric field analysis. The results showed that in high-humidity environments, the pre-discharge causes moisture to adhere to the coating surface, resulting in the increase in surface conductivity, which influences the electric field strength in the air gap.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"26 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":"124878066","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.2013.6748271
Ruihai Li, Kangtai Xu, Fuzeng Zhang, Zhuo Xu, Y. Tu, Bo Gong
Infrared temperature measurement technology is becoming increasingly applied in the detection of composite insulator defects. However, most evaluations of the operation condition of the insulators are based solely on the temperature rise without giving consideration to the factors of the environment, especially the temperature and humidity that the composite insulator is in. This paper focuses on the influence of temperature and humidity to temperature rise of the insulator and includes the study of a batch of overheating insulators from a transmission line. Differences are present in infrared temperature test results acquired from both the actual sites and in laboratories. Apart from this, the infrared test results change under various temperature and humidity in laboratory experiments. Therefore, taking consideration of the test environment is important in determining the degree of temperature rise. At last, suggestions on infrared detection are provided to guide testing at actual sites.
{"title":"A preliminary study on the impact of environment to the heat of insulator","authors":"Ruihai Li, Kangtai Xu, Fuzeng Zhang, Zhuo Xu, Y. Tu, Bo Gong","doi":"10.1109/CEIDP.2013.6748271","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748271","url":null,"abstract":"Infrared temperature measurement technology is becoming increasingly applied in the detection of composite insulator defects. However, most evaluations of the operation condition of the insulators are based solely on the temperature rise without giving consideration to the factors of the environment, especially the temperature and humidity that the composite insulator is in. This paper focuses on the influence of temperature and humidity to temperature rise of the insulator and includes the study of a batch of overheating insulators from a transmission line. Differences are present in infrared temperature test results acquired from both the actual sites and in laboratories. Apart from this, the infrared test results change under various temperature and humidity in laboratory experiments. Therefore, taking consideration of the test environment is important in determining the degree of temperature rise. At last, suggestions on infrared detection are provided to guide testing at actual sites.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"50 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":"124891077","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.2013.6748281
Baoxiang Wang, Lili Ma, C. Hao, Q. Lei
Polyacene quinone radical (PAQR) polymers were synthesized by the step-growth condensation of aromatic hydrocarbon derivatives reacting with pyromellitic anhydirde via a simple solvothermal method. The morphology and structures of PAQRs with varied polymerization processes were confirmed by the analysis of X-ray, IR, SEM and Raman measurement. The effects of different aromatic hydrocarbons on the synthesis of PAQR polymers were investigated and then utilized as an electrorheological (ER) material by dispersion in silicone oil. The ER performances are investigated as a function of electric field strength by using a rheometer, and the relationship between the conductivity and ER properties of different PAQR polymers are discussed.
{"title":"Synthesis of polyacene quinone radical polymers with controllable conductivity and their electrorheological behavior","authors":"Baoxiang Wang, Lili Ma, C. Hao, Q. Lei","doi":"10.1109/CEIDP.2013.6748281","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748281","url":null,"abstract":"Polyacene quinone radical (PAQR) polymers were synthesized by the step-growth condensation of aromatic hydrocarbon derivatives reacting with pyromellitic anhydirde via a simple solvothermal method. The morphology and structures of PAQRs with varied polymerization processes were confirmed by the analysis of X-ray, IR, SEM and Raman measurement. The effects of different aromatic hydrocarbons on the synthesis of PAQR polymers were investigated and then utilized as an electrorheological (ER) material by dispersion in silicone oil. The ER performances are investigated as a function of electric field strength by using a rheometer, and the relationship between the conductivity and ER properties of different PAQR polymers are discussed.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"38 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":"124917666","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：