Epoxy used as insulating material in electronic and electrical devices plays an important role in system reliability. Addition of nanoparticles into epoxy can improve the insulating properties compared with undoped material. However, due to the change of the material structure, trap characteristics and charge behaviors are altered as a consequence. This possibly leads to a great risk of electric field distortion and discharge that degrades the insulation. From the viewpoint of safety, it is necessary to investigate the charge behavior on epoxy nanocomposites. This paper presents study aimed at clarifying the effect of nano-filler content on surface charge accumulation and decay behaviors of epoxy nanocomposites with SiO2 particles. Samples were prepared by dispersing nano-scale SiO2 into epoxy by mixing with shear force. Corona charging tests were performed at room temperature with a relative humidity of ~ 40%. The charge distribution was measured by means of an electrostatic voltmeter. Obtained results show the dependence of the accumulated charge as well as the charge decay rate upon the concentration of SiO2, varying as a function of the charge polarity, charging time and charging voltage. It is suggested that the charge dynamics is dependent upon the characteristics of localized surface states that are altered by the nanoparticles.
{"title":"Effects of SiO2 particles on surface charge of epoxy nanocomposites","authors":"B. Du, Li Wang, J. Zhang, Yong Liu, Y. Gao","doi":"10.1541/IEEJFMS.133.224","DOIUrl":"https://doi.org/10.1541/IEEJFMS.133.224","url":null,"abstract":"Epoxy used as insulating material in electronic and electrical devices plays an important role in system reliability. Addition of nanoparticles into epoxy can improve the insulating properties compared with undoped material. However, due to the change of the material structure, trap characteristics and charge behaviors are altered as a consequence. This possibly leads to a great risk of electric field distortion and discharge that degrades the insulation. From the viewpoint of safety, it is necessary to investigate the charge behavior on epoxy nanocomposites. This paper presents study aimed at clarifying the effect of nano-filler content on surface charge accumulation and decay behaviors of epoxy nanocomposites with SiO2 particles. Samples were prepared by dispersing nano-scale SiO2 into epoxy by mixing with shear force. Corona charging tests were performed at room temperature with a relative humidity of ~ 40%. The charge distribution was measured by means of an electrostatic voltmeter. Obtained results show the dependence of the accumulated charge as well as the charge decay rate upon the concentration of SiO2, varying as a function of the charge polarity, charging time and charging voltage. It is suggested that the charge dynamics is dependent upon the characteristics of localized surface states that are altered by the nanoparticles.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"220 1","pages":"194-198"},"PeriodicalIF":0.0,"publicationDate":"2013-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78484049","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 : 2012-11-26DOI: 10.1109/ICHVE.2012.6357101
W. Lu, Q. Liu, Z. Wang
There have been increasing interests on natural esters as potential substitutes to conventional mineral oils in transformers, due to their less-flammable, non-toxic and environmentally friendly properties. The application has been successful in traction and distribution transformers with sealed type. But the susceptibility to oxidation and hence the suspected gelling behaviour prevent the application of natural esters in free-breathing transformers. This paper presents an experimental study of gelling/oxidation behaviour of thin films of a natural ester under thermal ageing. Ageing experiments were carried out with presence of air at different temperatures of 120 °C and 20 °C and durations up to 2 years. The gelling/oxidation behaviour of natural ester was evaluated in terms of changes in viscosity and acidity. Results showed that both viscosity and acidity can be used to assess gelling/oxidation behaviour of natural ester from initial liquid phase to eventually gelled form. In addition to temperature, the thickness of the thin film samples has a significant effect on the gelling speed, i.e. the thinner of the film, the faster of the gelling speed.
{"title":"Gelling behaviour of natural ester transformer liquid under thermal ageing","authors":"W. Lu, Q. Liu, Z. Wang","doi":"10.1109/ICHVE.2012.6357101","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357101","url":null,"abstract":"There have been increasing interests on natural esters as potential substitutes to conventional mineral oils in transformers, due to their less-flammable, non-toxic and environmentally friendly properties. The application has been successful in traction and distribution transformers with sealed type. But the susceptibility to oxidation and hence the suspected gelling behaviour prevent the application of natural esters in free-breathing transformers. This paper presents an experimental study of gelling/oxidation behaviour of thin films of a natural ester under thermal ageing. Ageing experiments were carried out with presence of air at different temperatures of 120 °C and 20 °C and durations up to 2 years. The gelling/oxidation behaviour of natural ester was evaluated in terms of changes in viscosity and acidity. Results showed that both viscosity and acidity can be used to assess gelling/oxidation behaviour of natural ester from initial liquid phase to eventually gelled form. In addition to temperature, the thickness of the thin film samples has a significant effect on the gelling speed, i.e. the thinner of the film, the faster of the gelling speed.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"110 1","pages":"643-647"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85768227","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 : 2012-11-26DOI: 10.1109/ICHVE.2012.6357009
Baoquan Liu, A. Jiang, Z. Fu
The statistical data show lightning strike is the major cause of the floating oil tanks ignition and the actual tank stroke-ignition process is still not completely known. The effects of direct lightning stroke on floating oil tank have been studied a lot in previous works and there is little research on the influence of lightning stroke in the vicinity of tank. In order to study the indirect effect of lightning on the floating roof oil tanks, refer to the lightning-induced overvoltage scale model experiment used for power distribution line, this paper designs two type of scale model experiment in laboratory concentrate on the effect of thundercloud and return stroke channel respectively. The former experiment was conducted. Preliminary application results show that if the floating roof and tank shell was connected by the shunts or bonding cable, the induced charge generated by the thundercloud model was not measured. No spark was observed during the entire experiment.
{"title":"Scale model experiment for the study of lightning-induced spark discharge on large floating roof oil tanks","authors":"Baoquan Liu, A. Jiang, Z. Fu","doi":"10.1109/ICHVE.2012.6357009","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357009","url":null,"abstract":"The statistical data show lightning strike is the major cause of the floating oil tanks ignition and the actual tank stroke-ignition process is still not completely known. The effects of direct lightning stroke on floating oil tank have been studied a lot in previous works and there is little research on the influence of lightning stroke in the vicinity of tank. In order to study the indirect effect of lightning on the floating roof oil tanks, refer to the lightning-induced overvoltage scale model experiment used for power distribution line, this paper designs two type of scale model experiment in laboratory concentrate on the effect of thundercloud and return stroke channel respectively. The former experiment was conducted. Preliminary application results show that if the floating roof and tank shell was connected by the shunts or bonding cable, the induced charge generated by the thundercloud model was not measured. No spark was observed during the entire experiment.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"95 1","pages":"81-84"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86045103","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 : 2012-11-26DOI: 10.1109/ICHVE.2012.6357061
W. McDermid, J. Lambert
Manitoba Hydro has constructed a high voltage test facility for full electrical testing of equipment rated up to 550 kVac and 500 kVdc. The second stage of the project is the addition of a test system for power transformers up to 310 MVA 3-phase and up to 400 MVA 1-phase. This test system is based on a voltage source converter and includes compensation to facilitate load loss tests. The paper provides some details on the various aspects of the work.
{"title":"Power transformer testing at Manitoba Hydro's high voltage test facility","authors":"W. McDermid, J. Lambert","doi":"10.1109/ICHVE.2012.6357061","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357061","url":null,"abstract":"Manitoba Hydro has constructed a high voltage test facility for full electrical testing of equipment rated up to 550 kVac and 500 kVdc. The second stage of the project is the addition of a test system for power transformers up to 310 MVA 3-phase and up to 400 MVA 1-phase. This test system is based on a voltage source converter and includes compensation to facilitate load loss tests. The paper provides some details on the various aspects of the work.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"159 1","pages":"92-94"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76626180","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 : 2012-11-26DOI: 10.1109/ICHVE.2012.6357062
A. Al-arainy, N. Malik, M. Qureshi
This paper reports on the findings of a field study carried out to determine the causes of premature failures of pole mounted distribution transformers installed in mountainous regions of Saudi Arabia that have comparatively high isokauranic level. The study consisted of transformer failure data analysis, field surveys to inspect installation of transformers, protective devices and grounding arrangements and measurements of grounding resistances, and laboratory measurements on new and used transformers as well as on surge arresters. Based on the study, several possible causes were identified as contributory factors for high failure rates. Recommendations were extended both to power utility as well as local transformer manufacturers. With the implementations of these recommendations, the failure incidences reduced significantly. This paper provides a summary of the study and main findings.
{"title":"A study of failure of pole mounted distribution transformers","authors":"A. Al-arainy, N. Malik, M. Qureshi","doi":"10.1109/ICHVE.2012.6357062","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357062","url":null,"abstract":"This paper reports on the findings of a field study carried out to determine the causes of premature failures of pole mounted distribution transformers installed in mountainous regions of Saudi Arabia that have comparatively high isokauranic level. The study consisted of transformer failure data analysis, field surveys to inspect installation of transformers, protective devices and grounding arrangements and measurements of grounding resistances, and laboratory measurements on new and used transformers as well as on surge arresters. Based on the study, several possible causes were identified as contributory factors for high failure rates. Recommendations were extended both to power utility as well as local transformer manufacturers. With the implementations of these recommendations, the failure incidences reduced significantly. This paper provides a summary of the study and main findings.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"54 1","pages":"95-99"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78818605","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 : 2012-11-26DOI: 10.1109/ICHVE.2012.6357031
Bo Zhang, Wenzhuo Wang, Jinliang He, R. Zeng, H. Yin
The measurement of DC electric field is of great significant. This paper introduces the structure and working principle of the field-mill instrument firstly. Then the calibration method of field-mill instrument in a uniform space-charge-free field is introduced and the error in the calibration is studied by numerical calculation. The calibration coefficient is corrected to be more accurate afterwards. At last, the interaction between the field-mill instruments is discussed. By means of numerical calculation, the shortest distance between two field-mill instruments which can control the measurement error less than 5% is put forward.
{"title":"Calibration of field-mill instrument for measuring DC electric field","authors":"Bo Zhang, Wenzhuo Wang, Jinliang He, R. Zeng, H. Yin","doi":"10.1109/ICHVE.2012.6357031","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357031","url":null,"abstract":"The measurement of DC electric field is of great significant. This paper introduces the structure and working principle of the field-mill instrument firstly. Then the calibration method of field-mill instrument in a uniform space-charge-free field is introduced and the error in the calibration is studied by numerical calculation. The calibration coefficient is corrected to be more accurate afterwards. At last, the interaction between the field-mill instruments is discussed. By means of numerical calculation, the shortest distance between two field-mill instruments which can control the measurement error less than 5% is put forward.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"27 1","pages":"455-458"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78841096","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 : 2012-11-26DOI: 10.1109/ICHVE.2012.6357051
D. Wotzka
Five different regression functions have been applied for modeling of acoustic emission (AE) signal generated by partial discharges (PDs) occurring in oil immersed insulation of electric power transformers. In the paper methodology and results of the regression analysis are presented.
{"title":"Mathematical description of acoustic emission signals generated by partial discharges","authors":"D. Wotzka","doi":"10.1109/ICHVE.2012.6357051","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357051","url":null,"abstract":"Five different regression functions have been applied for modeling of acoustic emission (AE) signal generated by partial discharges (PDs) occurring in oil immersed insulation of electric power transformers. In the paper methodology and results of the regression analysis are presented.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"79 1","pages":"617-620"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88259135","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 : 2012-11-26DOI: 10.1109/ICHVE.2012.6357072
M. M. S. Shirazi, H. Borsi, E. Gockenbach
Inorganic nanofillers combined with organic polymers have been used for several years in order to enhance the electrical and dielectric properties of insulation materials. The advantages of using nanofillers can be explained by very large interface area of them in comparison with microfillers. To evaluate the influence of Al2O3and also γ-TiO2nanofillers separately on a cycloaliphatic epoxy resin system as an outdoor insulation system, specific DC volume resistivity, loss factor and permittivity were investigated. In this regard, several specimens with 2 mm thickness were produced containing 0%, 1%, 3%, 5% and 7% per weight under especial condition to have the most possible homogeneous distribution of nanofillers. Then the behavior of the mentioned parameters was investigated from 23 °C up to 170 °C at different frequencies. According to the results, DC volume resistivity of the specimens with Al2O3 shows higher resistance between 80 °C and 140 °C than the specimens without nanofiller. Adding TiO2 does not cause considerable changes in volume resistivity. Loss factor has no significant change up to glass transition temperature (Tg), but it reduces at the temperatures above Tg, when Al2O3 or TiO2 was added. Relative permittivity of the specimens containing Al2O3 and TiO2 were increased up to 110 °C. After this temperature, relative permittivity of all nanocomposites decreases in comparison to 0 wt. %.
{"title":"Investigation of a cycloaliphatic epoxy resin system considering Al2O3 and TiO2 nanofillers","authors":"M. M. S. Shirazi, H. Borsi, E. Gockenbach","doi":"10.1109/ICHVE.2012.6357072","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357072","url":null,"abstract":"Inorganic nanofillers combined with organic polymers have been used for several years in order to enhance the electrical and dielectric properties of insulation materials. The advantages of using nanofillers can be explained by very large interface area of them in comparison with microfillers. To evaluate the influence of Al<sub>2</sub>O<sub>3</sub>and also γ-TiO<sub>2</sub>nanofillers separately on a cycloaliphatic epoxy resin system as an outdoor insulation system, specific DC volume resistivity, loss factor and permittivity were investigated. In this regard, several specimens with 2 mm thickness were produced containing 0%, 1%, 3%, 5% and 7% per weight under especial condition to have the most possible homogeneous distribution of nanofillers. Then the behavior of the mentioned parameters was investigated from 23 °C up to 170 °C at different frequencies. According to the results, DC volume resistivity of the specimens with Al<sub>2</sub>O<sub>3</sub> shows higher resistance between 80 °C and 140 °C than the specimens without nanofiller. Adding TiO<sub>2</sub> does not cause considerable changes in volume resistivity. Loss factor has no significant change up to glass transition temperature (Tg), but it reduces at the temperatures above Tg, when Al<sub>2</sub>O<sub>3</sub> or TiO<sub>2</sub> was added. Relative permittivity of the specimens containing Al<sub>2</sub>O<sub>3</sub> and TiO<sub>2</sub> were increased up to 110 °C. After this temperature, relative permittivity of all nanocomposites decreases in comparison to 0 wt. %.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"2010 1","pages":"186-189"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86285157","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 : 2012-11-26DOI: 10.1109/ICHVE.2012.6357099
Yuan Zhou, M. Hao, G. Chen, G. Wilson, P. Jarman
Mineral oil has been widely used in power transformers and understanding the mechanism of the conduction process in mineral oil is important as it reflects the status of oil conditions. Dielectric spectroscopy, as a non-destructive measurement, has been employed for analyzing dielectric properties of material for many years. This paper presents findings from the study on new transformer oil by a frequency domain method. It has been found that the conductivity of the oil calculated from dielectric response in the low frequency range (100Hz~0.001Hz) comprises three stages: two steady states joined by a transient process. Both the distance between the two electrodes of the testing cell and the temperature of oil influence the starting frequency of the transient process. The oil model used to analyze the DC conductivity of oil has been applied to simulate the frequency-dependence conductivity curve and a new factor has been introduced into the model to improve its accuracy. According to this model, the mobility of charge carriers increases with temperature significantly, whilst density of initial charge carriers only increases slightly, indicating the crucial factor that influences the conductivity is the viscosity of the oil.
{"title":"Frequency-dependence of conductivity of new mineral oil studied by dielectric spectroscopy","authors":"Yuan Zhou, M. Hao, G. Chen, G. Wilson, P. Jarman","doi":"10.1109/ICHVE.2012.6357099","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357099","url":null,"abstract":"Mineral oil has been widely used in power transformers and understanding the mechanism of the conduction process in mineral oil is important as it reflects the status of oil conditions. Dielectric spectroscopy, as a non-destructive measurement, has been employed for analyzing dielectric properties of material for many years. This paper presents findings from the study on new transformer oil by a frequency domain method. It has been found that the conductivity of the oil calculated from dielectric response in the low frequency range (100Hz~0.001Hz) comprises three stages: two steady states joined by a transient process. Both the distance between the two electrodes of the testing cell and the temperature of oil influence the starting frequency of the transient process. The oil model used to analyze the DC conductivity of oil has been applied to simulate the frequency-dependence conductivity curve and a new factor has been introduced into the model to improve its accuracy. According to this model, the mobility of charge carriers increases with temperature significantly, whilst density of initial charge carriers only increases slightly, indicating the crucial factor that influences the conductivity is the viscosity of the oil.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"151 1","pages":"634-637"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86363742","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 : 2012-11-26DOI: 10.1109/ICHVE.2012.6357136
Sen Wang, Bo Niu, Jie Guo, Panfeng Hu, Zhizhong Li, Xiaoming Zhu
An over-voltage online monitoring system based on the impulse full current of arrester is developed in this paper. The system measures the wave head and amplitude of the impulse full current of arrester through external-integral rogowski coil, and transfers the measurement result to the upper computer via USB optical measuring system, and then implements the measurement and monitoring on over-voltage through function fitting software. This paper focus on the over-voltage fitting method based on the impulse full current of arrester, and achieves amplitude sample database of impulse current, amplitude of wave head and node voltage (residual voltage) by node voltage test and simulation of wave head and amplitude in different lightning and switching impulse action current, and obtains the impulse current and node voltage fitting algorithm according to mass of data, as well as compiles recovery software of impulse current-node voltage by use of Visual Basic to implement reduction of over-voltage amplitude.
{"title":"Over-voltage online monitoring system based on the impulse full current of arrester","authors":"Sen Wang, Bo Niu, Jie Guo, Panfeng Hu, Zhizhong Li, Xiaoming Zhu","doi":"10.1109/ICHVE.2012.6357136","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357136","url":null,"abstract":"An over-voltage online monitoring system based on the impulse full current of arrester is developed in this paper. The system measures the wave head and amplitude of the impulse full current of arrester through external-integral rogowski coil, and transfers the measurement result to the upper computer via USB optical measuring system, and then implements the measurement and monitoring on over-voltage through function fitting software. This paper focus on the over-voltage fitting method based on the impulse full current of arrester, and achieves amplitude sample database of impulse current, amplitude of wave head and node voltage (residual voltage) by node voltage test and simulation of wave head and amplitude in different lightning and switching impulse action current, and obtains the impulse current and node voltage fitting algorithm according to mass of data, as well as compiles recovery software of impulse current-node voltage by use of Visual Basic to implement reduction of over-voltage amplitude.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"38 1","pages":"348-352"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79279871","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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