Pub Date : 2013-10-01DOI: 10.1109/CEIDP.2013.6748334
Chen Yi-long, Qi Bo, Li Cheng-rong, Xi Chao-chao, Liao Yi-fan
It is very important of the surface charge distributions on the oil impregnated pressboard under nonuniform DC electric field, for the design and application issue of a converter transformer, which is not reported in the literature. In order to have a better understanding of the characteristics of the surface charges on oil impregnated pressboard produced by the non-uniform DC electric field, we studied surface charge distribution on oil impregnated pressboard produced by the needle plate electrode based on an electrostatic capacitive probe measuring system. It is found that under the highly non-uniform electric field, the surface charge polarity on oil impregnated pressboard mainly depend on the polarity of applied voltage and the accumulation and dissipation characteristics of the surface charges under the positive stress are different from that under the negative stress.
{"title":"Characteristics of surface charge on oil impregnated pressboard under non-uniform DC stress","authors":"Chen Yi-long, Qi Bo, Li Cheng-rong, Xi Chao-chao, Liao Yi-fan","doi":"10.1109/CEIDP.2013.6748334","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748334","url":null,"abstract":"It is very important of the surface charge distributions on the oil impregnated pressboard under nonuniform DC electric field, for the design and application issue of a converter transformer, which is not reported in the literature. In order to have a better understanding of the characteristics of the surface charges on oil impregnated pressboard produced by the non-uniform DC electric field, we studied surface charge distribution on oil impregnated pressboard produced by the needle plate electrode based on an electrostatic capacitive probe measuring system. It is found that under the highly non-uniform electric field, the surface charge polarity on oil impregnated pressboard mainly depend on the polarity of applied voltage and the accumulation and dissipation characteristics of the surface charges under the positive stress are different from that under the negative stress.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"219 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":"115741501","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.2013.6748267
J. Cheng, P. Werelius, D. Robalino, D. Wang
Dielectric Response Analysis of power transformer is widely used in a number of field tests and research projects. Both Dielectric Frequency Response (DFR) and Polarization and Depolarization Current (PDC) combined with proper paper-oil modeling are able to give more reliable condition assessment of power transformers. Power factor/dissipation factor test at power frequency (50/60 Hz) usually exhibits a flat response as a function of test voltage if the insulation is in good condition. However, the voltage dependent behavior starts to appear if the existence of the polarization voltage is prolonged. The mineral oil and cellulose of the transformer/bushing insulation system form the interface where electric charges accumulate and thus the nonlinear property shows. The nonlinear property depends on the electric field strength as well as the geometry of the insulation system. Several transformers with different power ratings and a condenser bushing are tested by the Dielectric Response method from 20 V to 1.4 kVrms. The measurements show that the nonlinear behavior may exist at low frequencies while the high frequency parameters are voltage independent. Furthermore, lager power transformers are less sensitive to the test voltages. The high voltage distortion of the PDC method could be more than the DFR method because of its longer polarization period. The test voltage and frequency need to be carefully chosen before carrying out any insulation test.
{"title":"The nonlinear behavior of the transformer insulation system","authors":"J. Cheng, P. Werelius, D. Robalino, D. Wang","doi":"10.1109/CEIDP.2013.6748267","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748267","url":null,"abstract":"Dielectric Response Analysis of power transformer is widely used in a number of field tests and research projects. Both Dielectric Frequency Response (DFR) and Polarization and Depolarization Current (PDC) combined with proper paper-oil modeling are able to give more reliable condition assessment of power transformers. Power factor/dissipation factor test at power frequency (50/60 Hz) usually exhibits a flat response as a function of test voltage if the insulation is in good condition. However, the voltage dependent behavior starts to appear if the existence of the polarization voltage is prolonged. The mineral oil and cellulose of the transformer/bushing insulation system form the interface where electric charges accumulate and thus the nonlinear property shows. The nonlinear property depends on the electric field strength as well as the geometry of the insulation system. Several transformers with different power ratings and a condenser bushing are tested by the Dielectric Response method from 20 V to 1.4 kVrms. The measurements show that the nonlinear behavior may exist at low frequencies while the high frequency parameters are voltage independent. Furthermore, lager power transformers are less sensitive to the test voltages. The high voltage distortion of the PDC method could be more than the DFR method because of its longer polarization period. The test voltage and frequency need to be carefully chosen before carrying out any insulation test.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"96 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":"124287146","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.2013.6748264
Jia Meng, Yewen Zhang, F. Zheng, Z. An
Electroluminescence generated during the short circuit of the polarized Linear low density polyethylene (LLDPE) sample is investigated. By measuring the electroluminescence and damped oscillation discharge current, the relations between the electroluminescence and discharge current was discussed. Results show that the luminescence comes from space charge recombination, which was partly demonstrated by the equivalent capacitance decided (damped oscillatory) period of short-circuit current.
{"title":"The influence of polarizing field on an electroluminescence generated by LLDPE films","authors":"Jia Meng, Yewen Zhang, F. Zheng, Z. An","doi":"10.1109/CEIDP.2013.6748264","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748264","url":null,"abstract":"Electroluminescence generated during the short circuit of the polarized Linear low density polyethylene (LLDPE) sample is investigated. By measuring the electroluminescence and damped oscillation discharge current, the relations between the electroluminescence and discharge current was discussed. Results show that the luminescence comes from space charge recombination, which was partly demonstrated by the equivalent capacitance decided (damped oscillatory) period of short-circuit current.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"78 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":"114847145","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.2013.6748283
Bo Gong, Y. Tu, Yiyang Zhou, Ruihai Li, Fuzeng Zhang, Zhuo Xu, Dong Liang
In a high humidity environment, the composite insulating material will absorb moisture from the air, the dielectric properties of the material may change consequently, thus accelerating degradation of mechanical and insulating properties. High-temperature vulcanized (HTV) silicone rubber, commonly used as composite insulators shed and housing materials, has been investigated for their moisture absorption characteristics and dielectric properties during the moisture absorbing process. New and operated silicone rubber materials are stored at 90% relative humidity, moisture contents and dielectric parameters are measured periodically. The diffusion coefficient and maximum moisture content of silicone rubber based on Fick's diffusion law are calculated. Differences of water absorption and dielectric properties between silicone rubber materials before and after operating are discussed. Theoretical analysis and experimental studies have shown that moisture absorption characteristics of silicone rubber material are in good agreement with Fick's law, and at a constant ambient humidity the diffusion coefficient and maximum moisture content of new silicone rubber are less than that of the operated. With the contents of moisture increasing, the dielectric properties of silicone rubber materials change simultaneously, and significantly differ between silicone rubber materials before and after operating. Intrusion of moisture may change the dielectric properties of silicone rubber material, and dielectric loss factor and conductivity trends exactly coincide with the moisture content. Moisture may play a crucial role in degradation of silicone rubber composite insulators, which needs further verification.
{"title":"Moisture absorption characteristics of silicone rubber and its effect on dielectric properties","authors":"Bo Gong, Y. Tu, Yiyang Zhou, Ruihai Li, Fuzeng Zhang, Zhuo Xu, Dong Liang","doi":"10.1109/CEIDP.2013.6748283","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748283","url":null,"abstract":"In a high humidity environment, the composite insulating material will absorb moisture from the air, the dielectric properties of the material may change consequently, thus accelerating degradation of mechanical and insulating properties. High-temperature vulcanized (HTV) silicone rubber, commonly used as composite insulators shed and housing materials, has been investigated for their moisture absorption characteristics and dielectric properties during the moisture absorbing process. New and operated silicone rubber materials are stored at 90% relative humidity, moisture contents and dielectric parameters are measured periodically. The diffusion coefficient and maximum moisture content of silicone rubber based on Fick's diffusion law are calculated. Differences of water absorption and dielectric properties between silicone rubber materials before and after operating are discussed. Theoretical analysis and experimental studies have shown that moisture absorption characteristics of silicone rubber material are in good agreement with Fick's law, and at a constant ambient humidity the diffusion coefficient and maximum moisture content of new silicone rubber are less than that of the operated. With the contents of moisture increasing, the dielectric properties of silicone rubber materials change simultaneously, and significantly differ between silicone rubber materials before and after operating. Intrusion of moisture may change the dielectric properties of silicone rubber material, and dielectric loss factor and conductivity trends exactly coincide with the moisture content. Moisture may play a crucial role in degradation of silicone rubber composite insulators, which needs further verification.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"1198 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":"123418294","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.2013.6747417
Liu Guo-te, Hao Yan-peng, Zhang Wei, Chen Yan
Transmission line icing involves drop diameter, wind speed, temperature and other parameters. In this paper, according to the China Southern Power Grid micro-meteorological, icing master image, and site acquisition droplet spectrum data, we use fluent to simulate the insulator soft rime, hard rime of super-cooled water drip ice process field, calculation of insulator umbrella skirt edge, on the surface, the number of droplets impact mandrel. The results show that, the hard rime icing the average temperature of -3.65 °C, humidity above 98%, the average days of rainfall 1.95mm; hard rime formed mainly in the rain and fog hard weather, precipitation are hard rime liquid water main source, the ice physical process for ice stem growth and wet growth alternately.
{"title":"A comparative study of icing mechanism between soft rime and hard rime for the operating insulators","authors":"Liu Guo-te, Hao Yan-peng, Zhang Wei, Chen Yan","doi":"10.1109/CEIDP.2013.6747417","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747417","url":null,"abstract":"Transmission line icing involves drop diameter, wind speed, temperature and other parameters. In this paper, according to the China Southern Power Grid micro-meteorological, icing master image, and site acquisition droplet spectrum data, we use fluent to simulate the insulator soft rime, hard rime of super-cooled water drip ice process field, calculation of insulator umbrella skirt edge, on the surface, the number of droplets impact mandrel. The results show that, the hard rime icing the average temperature of -3.65 °C, humidity above 98%, the average days of rainfall 1.95mm; hard rime formed mainly in the rain and fog hard weather, precipitation are hard rime liquid water main source, the ice physical process for ice stem growth and wet growth alternately.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"21 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":"125908900","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.2013.6748288
E. Sili, J. Cambronne
Recent aircraft designs increasingly use electrical systems with higher voltages. This can lead to the occurrence of partial discharges. Tests for these phenomena are relatively poorly documented in comparison with other standardized tests available for aerospace components. After having investigated the effect of temperature, pressure, and moisture on the behaviour of the energy dissipated by the discharges and on polyimide film endurance during ageing under partial discharge. A complementary study is presented in this article where the applicability of the lifetime models presented in the literature in the case of an aging under electrical discharge in aeronautical environment is analysed and discussed. It has been demonstrated that one of these models can be used for the deduction of the lifetime of the polyimide aged under partial discharge in a combined variation of temperature and pressure.
{"title":"About the validity of lifetime models of polymers under electrical discharge in aeronautical environment","authors":"E. Sili, J. Cambronne","doi":"10.1109/CEIDP.2013.6748288","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748288","url":null,"abstract":"Recent aircraft designs increasingly use electrical systems with higher voltages. This can lead to the occurrence of partial discharges. Tests for these phenomena are relatively poorly documented in comparison with other standardized tests available for aerospace components. After having investigated the effect of temperature, pressure, and moisture on the behaviour of the energy dissipated by the discharges and on polyimide film endurance during ageing under partial discharge. A complementary study is presented in this article where the applicability of the lifetime models presented in the literature in the case of an aging under electrical discharge in aeronautical environment is analysed and discussed. It has been demonstrated that one of these models can be used for the deduction of the lifetime of the polyimide aged under partial discharge in a combined variation of temperature and pressure.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"46 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":"126162997","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.2013.6748107
Lizhi Zhao, Weigen Chen, Fu Wan, Jing Shi
Dissolved Gas Analysis (DGA) is regarded as one of the key technologies to diagnose the internal insulation condition of oil-immersed power transformers, since the concentrations and the generation rates of the fault characteristic gases dissolved in transformer oil can reflect the internal insulation defects and their developments. It is the precondition of DGA to find an accurate way to detect the composition and the content of the mixed gas. Comparing with the traditional on-line monitoring technologies, Laser Raman spectroscopy (LRS) has incomparable advantages, such as no carrier gas consumption, no sample gas separation, using single-frequency laser, which is easy to achieve online monitoring. Based on the basic principle of LRS, we elaborate the mechanism using LRS for quantitative and qualitative analysis and the relevant experimental methods. The Raman characteristic spectral lines of the seven fault characteristic gases in transformer are determined by calculating. Based on confocal Raman technology and high sensitivity gas sample cell, a LRS test device for gas detection is established. By using this device, a mixed gas sample containing the seven fault characteristic gases (H2, CH4, C2H6, C2H4, C2H2, CO, CO2) is tested. The results show that the qualitative and quantitative analysis of LRS for dissolved gas in transformer oil is feasible.
{"title":"Laser Raman spectroscopy applied in detecting dissolved gas in transformer oil","authors":"Lizhi Zhao, Weigen Chen, Fu Wan, Jing Shi","doi":"10.1109/CEIDP.2013.6748107","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748107","url":null,"abstract":"Dissolved Gas Analysis (DGA) is regarded as one of the key technologies to diagnose the internal insulation condition of oil-immersed power transformers, since the concentrations and the generation rates of the fault characteristic gases dissolved in transformer oil can reflect the internal insulation defects and their developments. It is the precondition of DGA to find an accurate way to detect the composition and the content of the mixed gas. Comparing with the traditional on-line monitoring technologies, Laser Raman spectroscopy (LRS) has incomparable advantages, such as no carrier gas consumption, no sample gas separation, using single-frequency laser, which is easy to achieve online monitoring. Based on the basic principle of LRS, we elaborate the mechanism using LRS for quantitative and qualitative analysis and the relevant experimental methods. The Raman characteristic spectral lines of the seven fault characteristic gases in transformer are determined by calculating. Based on confocal Raman technology and high sensitivity gas sample cell, a LRS test device for gas detection is established. By using this device, a mixed gas sample containing the seven fault characteristic gases (H2, CH4, C2H6, C2H4, C2H2, CO, CO2) is tested. The results show that the qualitative and quantitative analysis of LRS for dissolved gas in transformer oil is feasible.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"238 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":"124616303","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.2013.6748269
S. Wan, Xuesong Zhao, Xinyang Guo, Chen Lan, X. Bian, Wenjun Yao, M. Macalpine, Liming Wang, Z. Guan
Defects of high-voltage transmission lines are often accompanied with corona discharge; and corona discharge would produce ultraviolet. Based on this principle, the UV imager can be used in detecting the defect. Electric field strength is the main factor affecting the corona discharge, which is determined by power-supply and experimental model. In this paper, UV measurement of different defects was studied, and the effect of Applied-voltage on corona discharge of defects was acquired. A quadratic relationship exists between the UV strength produced by corona discharge and applied voltage. The quadratic coefficient A is between 0.31~0.37, which is increase with the length increasing at the experimental conditions in this paper.
{"title":"The effect of Applied-voltage on photon-number of corona discharge on transmission lines defect","authors":"S. Wan, Xuesong Zhao, Xinyang Guo, Chen Lan, X. Bian, Wenjun Yao, M. Macalpine, Liming Wang, Z. Guan","doi":"10.1109/CEIDP.2013.6748269","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748269","url":null,"abstract":"Defects of high-voltage transmission lines are often accompanied with corona discharge; and corona discharge would produce ultraviolet. Based on this principle, the UV imager can be used in detecting the defect. Electric field strength is the main factor affecting the corona discharge, which is determined by power-supply and experimental model. In this paper, UV measurement of different defects was studied, and the effect of Applied-voltage on corona discharge of defects was acquired. A quadratic relationship exists between the UV strength produced by corona discharge and applied voltage. The quadratic coefficient A is between 0.31~0.37, which is increase with the length increasing at the experimental conditions in this paper.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"78 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":"124813393","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.2013.6748335
M. Frechette, P. Mancinelli, C. Vanga-Bouanga, S. Savoie, É. David, D. Fabiani
Epoxy powder (EP) was ball-milled together with Graphene Oxide (GO) to form a new filler to be added to epoxy resin. The idea was that ball-milling would make interact the GO with the powder. The present trials and optical analysis seem to indicate that there is a cause-to-effect relation between the duo EP/GO and its agglomeration. Once the filler added to epoxy resin, the resulting composite was found to behave like a dielectric, with dielectric responses very similar to those of neat epoxy. In fact, over the frequency range of 10-2-106 Hz, the permittivities values were found to be lower than those of neat epoxy.
{"title":"Preparation and dielectric responses of solid epoxy composites containing a mixture of epoxy powder ball-milled with GO","authors":"M. Frechette, P. Mancinelli, C. Vanga-Bouanga, S. Savoie, É. David, D. Fabiani","doi":"10.1109/CEIDP.2013.6748335","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748335","url":null,"abstract":"Epoxy powder (EP) was ball-milled together with Graphene Oxide (GO) to form a new filler to be added to epoxy resin. The idea was that ball-milling would make interact the GO with the powder. The present trials and optical analysis seem to indicate that there is a cause-to-effect relation between the duo EP/GO and its agglomeration. Once the filler added to epoxy resin, the resulting composite was found to behave like a dielectric, with dielectric responses very similar to those of neat epoxy. In fact, over the frequency range of 10-2-106 Hz, the permittivities values were found to be lower than those of neat epoxy.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"56 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":"128373453","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.2013.6748231
Bo Liu, Xinzhe Yu, Z. Su, Jun Zhou, Yueneng Xu
Icing flashover performance of insulator strings for UHV transmission lines is usually obtained by diverse test methods, but mostly based on the method of raising voltage to a flashover, including the method recommend in IEEE Std. 1783-2009. An icing flashover test method was proposed in this paper in consideration of the disadvantages and merits of existing methods. With the recommended method, full-scaled insulator strings are energized under a constant test voltage during icing, hardening and melting period until a flashover occurs or withstands. And then an Up-and-Down method is utilized to obtain the 50% flashover voltage. Then icing flashover test results obtained by this recommended method and IEEE method are compared by flashover voltage and arc & leakage current characteristics. It shows that the average flashover voltage obtained by IEEE method is about 17% higher than U50% obtained by the method recommended in this paper, while the deviation is much higher too. And from arc developing point, the withstanding process with a constant voltage provides a condition that arcs may develop by nature, which make this method fit the reality of operating insulators better. In conclusion, the test method recommended in this paper is more suitable for icing flashover tests and outdoor insulation design.
{"title":"Research on icing flashover test methods and leakage current analysis of full-scaled insulator strings","authors":"Bo Liu, Xinzhe Yu, Z. Su, Jun Zhou, Yueneng Xu","doi":"10.1109/CEIDP.2013.6748231","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748231","url":null,"abstract":"Icing flashover performance of insulator strings for UHV transmission lines is usually obtained by diverse test methods, but mostly based on the method of raising voltage to a flashover, including the method recommend in IEEE Std. 1783-2009. An icing flashover test method was proposed in this paper in consideration of the disadvantages and merits of existing methods. With the recommended method, full-scaled insulator strings are energized under a constant test voltage during icing, hardening and melting period until a flashover occurs or withstands. And then an Up-and-Down method is utilized to obtain the 50% flashover voltage. Then icing flashover test results obtained by this recommended method and IEEE method are compared by flashover voltage and arc & leakage current characteristics. It shows that the average flashover voltage obtained by IEEE method is about 17% higher than U50% obtained by the method recommended in this paper, while the deviation is much higher too. And from arc developing point, the withstanding process with a constant voltage provides a condition that arcs may develop by nature, which make this method fit the reality of operating insulators better. In conclusion, the test method recommended in this paper is more suitable for icing flashover tests and outdoor insulation design.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130885056","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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