Pub Date : 2010-11-18DOI: 10.1109/ICHVE.2010.5640854
Sandra Jany, A. Nysveen, S. Ingebrigtsen
This paper presents results from dielectric tests along the surface of the base plate of an IGBT module as well as on printed circuit boards (PCBs). The PCBs have simplified geometries representative for base plates used in IGBT modules. The module will be applied in subsea converters, submerged in a liquid dielectric and exposed to subsea hydrostatic pressure. One base plate was cut to examine geometric details of the cross section with a microscope. These results were used for accurate modeling of the geometry used in FEM analysis of the electric field distribution. Pd-measurements with ac voltage were performed in both air and MIDEL 7131 oil on the base plate and the PCB test objects. The discharges were detected optically by using both a photomultiplier and a light-sensitive and high-speed CMOS video camera to respectively measure the pd inception voltage and the location of the discharges. It was found that at some critical voltage the pd activity increases rapidly before leading to an electric breakdown. The inception voltage of the measurements in oil showed up to be independent from the shape of the electrode geometry.
{"title":"Field characteristics and dielectric tests on an IGBT module plate","authors":"Sandra Jany, A. Nysveen, S. Ingebrigtsen","doi":"10.1109/ICHVE.2010.5640854","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640854","url":null,"abstract":"This paper presents results from dielectric tests along the surface of the base plate of an IGBT module as well as on printed circuit boards (PCBs). The PCBs have simplified geometries representative for base plates used in IGBT modules. The module will be applied in subsea converters, submerged in a liquid dielectric and exposed to subsea hydrostatic pressure. One base plate was cut to examine geometric details of the cross section with a microscope. These results were used for accurate modeling of the geometry used in FEM analysis of the electric field distribution. Pd-measurements with ac voltage were performed in both air and MIDEL 7131 oil on the base plate and the PCB test objects. The discharges were detected optically by using both a photomultiplier and a light-sensitive and high-speed CMOS video camera to respectively measure the pd inception voltage and the location of the discharges. It was found that at some critical voltage the pd activity increases rapidly before leading to an electric breakdown. The inception voltage of the measurements in oil showed up to be independent from the shape of the electrode geometry.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"6 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114085908","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 : 2010-11-18DOI: 10.1109/ICHVE.2010.5640744
Chao Tang, R. Liao, Lijun Yang, Fei-long Huang
In this paper, a set of accelerate thermal ageing experiments on oil immersed insulation paper were performed under 110❐ and lasted for more than 100 days. The degree of polymerization (DP), the frequency domain spectroscopy (FDS) and water concentration in insulating oil and paper, as well as the AC breakdown voltage of insulation paper were tested and analyzed. The results indicate that the dielectric properties can be used as indicators for the degradation evaluation of insulation paper. And the breakdown voltage of paper showed very little difference after accelerating thermal ageing, the electrical strength of oil-paper insulation system depends mainly on the performance of insulating oil.
{"title":"Research on the dielectric properties and breakdown voltage of transformer oil-paper insulation after accelerating thermal ageing","authors":"Chao Tang, R. Liao, Lijun Yang, Fei-long Huang","doi":"10.1109/ICHVE.2010.5640744","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640744","url":null,"abstract":"In this paper, a set of accelerate thermal ageing experiments on oil immersed insulation paper were performed under 110❐ and lasted for more than 100 days. The degree of polymerization (DP), the frequency domain spectroscopy (FDS) and water concentration in insulating oil and paper, as well as the AC breakdown voltage of insulation paper were tested and analyzed. The results indicate that the dielectric properties can be used as indicators for the degradation evaluation of insulation paper. And the breakdown voltage of paper showed very little difference after accelerating thermal ageing, the electrical strength of oil-paper insulation system depends mainly on the performance of insulating oil.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116029104","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 : 2010-11-18DOI: 10.1109/ICHVE.2010.5640748
J. Holto, E. Ildstad
In this study electrical tree growth in extruded isotactic and syndiotactic polypropylene (i-PP and s-PP) was compared, using a needle-plane geometry. Two main types of treeing were observed, either with one or multiple branches to the ground electrode before breakdown. Highest degree of simple branched trees was found in s-PP. The degree of crystallinity in s-PP was 53% lower than in i- PP and the spherulites size was found to be 5-15 times larger in i-PP than the crystalline areas observed in s-PP. The elasticity modulus for s-PP was half of that measured for i-PP. Despite these differences no significant difference in the propagation rate or time to breakdown during electrical tree growth was found.
{"title":"Electrical treeing in extruded polypropylene high voltage cable insulation","authors":"J. Holto, E. Ildstad","doi":"10.1109/ICHVE.2010.5640748","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640748","url":null,"abstract":"In this study electrical tree growth in extruded isotactic and syndiotactic polypropylene (i-PP and s-PP) was compared, using a needle-plane geometry. Two main types of treeing were observed, either with one or multiple branches to the ground electrode before breakdown. Highest degree of simple branched trees was found in s-PP. The degree of crystallinity in s-PP was 53% lower than in i- PP and the spherulites size was found to be 5-15 times larger in i-PP than the crystalline areas observed in s-PP. The elasticity modulus for s-PP was half of that measured for i-PP. Despite these differences no significant difference in the propagation rate or time to breakdown during electrical tree growth was found.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116600186","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 : 2010-11-18DOI: 10.1109/ICHVE.2010.5640789
Xingliang Jiang, Songhai Fan
Both operating experiences and experiments show that the cross-section shape of iced conductor has an obvious influence on ice-melting time, however, it is ignored by almost all the existing ice-melting models which suppose that the iced conductor has a perfect circular cross-section shape. Based on the observed results in the natural icing station, this paper has analyzed the shape characteristic of iced conductor, and described the cross-section shape of iced conductor with an ellipse, then put forward a model to simulate the ice-melting process on the iced conductor with an elliptic cross-section. The simulated results have been validated in the natural icing station. Both the simulated results and the experimental results show that the ice-melting time of elliptic iced conductor is less than that of the circular iced conductor. For the elliptic iced conductor, our model is more precise than the existed ice-melting model.
{"title":"DC ice-melting model for elliptic glaze iced conductor","authors":"Xingliang Jiang, Songhai Fan","doi":"10.1109/ICHVE.2010.5640789","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640789","url":null,"abstract":"Both operating experiences and experiments show that the cross-section shape of iced conductor has an obvious influence on ice-melting time, however, it is ignored by almost all the existing ice-melting models which suppose that the iced conductor has a perfect circular cross-section shape. Based on the observed results in the natural icing station, this paper has analyzed the shape characteristic of iced conductor, and described the cross-section shape of iced conductor with an ellipse, then put forward a model to simulate the ice-melting process on the iced conductor with an elliptic cross-section. The simulated results have been validated in the natural icing station. Both the simulated results and the experimental results show that the ice-melting time of elliptic iced conductor is less than that of the circular iced conductor. For the elliptic iced conductor, our model is more precise than the existed ice-melting model.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115505869","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 : 2010-11-18DOI: 10.1109/ICHVE.2010.5640801
Yinwei Li, Youyuan Wang, Guojun Lu, Jin Wang, Jun Xiong
Switchgears are the key equipments in the distribution network. Operating switchgear with active Partial Discharge (PD) increases the risk of failure occurring at the time of switching leading to increased risk to the operator. PD in switchgears can be considered to take two forms, surface discharge and internal discharge, if allowed to continue, eventually causes the insulation to break down catastrophically. The electromagnetic pulses produced by PD are in large part conducted away by the surrounding metalwork but a small proportion impinges onto the inner surface of the casing. These charges escape through joints in the metalwork, or a gasket on a gas insulated switch, and pass, as local raised voltages, across the surface of the switch to earth. These pulses of charge were named by Transient Earth Voltages (TEV), and the level of these TEV signals are proportional to the condition of the insulation for switchgear of the same type and model, measured at the same point. So TEV is a very powerful comparative technique for noninvasively checking the condition of switches. In this paper, the Finite-Difference Time-Domain (FDTD) method was employed to simulate the propagation law of TEV in the switchgear. The simulation results show that, the TEV amplitude is proportional to the PD pulse amplitude, increases with PD pulse width decrease and decrease with the distance between detection point and PD source.
{"title":"Simulation of transient earth voltages aroused by partial discharge in switchgears","authors":"Yinwei Li, Youyuan Wang, Guojun Lu, Jin Wang, Jun Xiong","doi":"10.1109/ICHVE.2010.5640801","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640801","url":null,"abstract":"Switchgears are the key equipments in the distribution network. Operating switchgear with active Partial Discharge (PD) increases the risk of failure occurring at the time of switching leading to increased risk to the operator. PD in switchgears can be considered to take two forms, surface discharge and internal discharge, if allowed to continue, eventually causes the insulation to break down catastrophically. The electromagnetic pulses produced by PD are in large part conducted away by the surrounding metalwork but a small proportion impinges onto the inner surface of the casing. These charges escape through joints in the metalwork, or a gasket on a gas insulated switch, and pass, as local raised voltages, across the surface of the switch to earth. These pulses of charge were named by Transient Earth Voltages (TEV), and the level of these TEV signals are proportional to the condition of the insulation for switchgear of the same type and model, measured at the same point. So TEV is a very powerful comparative technique for noninvasively checking the condition of switches. In this paper, the Finite-Difference Time-Domain (FDTD) method was employed to simulate the propagation law of TEV in the switchgear. The simulation results show that, the TEV amplitude is proportional to the PD pulse amplitude, increases with PD pulse width decrease and decrease with the distance between detection point and PD source.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122443455","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 : 2010-11-18DOI: 10.1109/ICHVE.2010.5640807
Xiaoxing Zhang, Ju Tang, Yanbin Xie
Radical frequency (RF) measurement has become hot point in field of partial discharge detection. However, a big problem that hampers the application of this method is difficult to establish a relationship between data from RF measurement and apparent discharge quantity, that is, use RF signal to estimate the apparent discharge. In this paper, on the basis of the experiment model of metal protrusion, the relationship between RF measurement and pulse current method (IEC60270) was investigated. The relationship curves of energy, double integration, peak voltage, peak-peak voltage, area of the RF signal relative to apparent discharge quantity or the square of apparent discharge quantity were plotted and the optimal regression curve was found out. At the same time, the impacts of voltage and the distance between protrusion and plate were investigated as well. The results indicate that the optimal regression curve is energy of RF signal relative to square of apparent discharge quantity. The variation of voltage has no impact on the regression curve, that is, data from different voltage regress to one line. However, while the distance between protrusion and plate is changed, the slope of regression curve changes according to it and the same energy is corresponding to bigger discharge quantity. The results are valuable to be applied in the field of estimation of the discharge quantity of RF partial discharge signal.
{"title":"Investigation of the relationship between PD measured with RF techniques and apparent charge quantity of metal protrusion in air","authors":"Xiaoxing Zhang, Ju Tang, Yanbin Xie","doi":"10.1109/ICHVE.2010.5640807","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640807","url":null,"abstract":"Radical frequency (RF) measurement has become hot point in field of partial discharge detection. However, a big problem that hampers the application of this method is difficult to establish a relationship between data from RF measurement and apparent discharge quantity, that is, use RF signal to estimate the apparent discharge. In this paper, on the basis of the experiment model of metal protrusion, the relationship between RF measurement and pulse current method (IEC60270) was investigated. The relationship curves of energy, double integration, peak voltage, peak-peak voltage, area of the RF signal relative to apparent discharge quantity or the square of apparent discharge quantity were plotted and the optimal regression curve was found out. At the same time, the impacts of voltage and the distance between protrusion and plate were investigated as well. The results indicate that the optimal regression curve is energy of RF signal relative to square of apparent discharge quantity. The variation of voltage has no impact on the regression curve, that is, data from different voltage regress to one line. However, while the distance between protrusion and plate is changed, the slope of regression curve changes according to it and the same energy is corresponding to bigger discharge quantity. The results are valuable to be applied in the field of estimation of the discharge quantity of RF partial discharge signal.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129404239","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 : 2010-11-18DOI: 10.1109/ICHVE.2010.5640757
Chuyan Zhang, Li-ming Wang, Zhi-dong Jia, Z. Guan
Composite insulators' shed plays a very important role in their contamination performance. As we have known, composite insulators with different shed profiles have different contamination flashover performances. In this paper, studies mainly focusing on the optimal design of composite insulators' shed. Based on the results of a great deal of artificial contamination test for specimen composite insulators with different profiles, this paper carried out the relationship between the shed parameter and the contamination flashover voltage. By the above work, flashover voltages of composite insulators can be enhanced greatly and the composite insulators will have higher utilization rate of the leakage distance. Therefore, the dimension of towers will be decreased and the cost of transmission systems will be reduced, especially in heavy pollution areas. Accordingly, this work can provide theoretical support of the external insulation design and the selection of insulators for 1000 kV UHV AC transmission projects in China.
{"title":"Research on the optimization of UHV AC composite insulators' shed","authors":"Chuyan Zhang, Li-ming Wang, Zhi-dong Jia, Z. Guan","doi":"10.1109/ICHVE.2010.5640757","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640757","url":null,"abstract":"Composite insulators' shed plays a very important role in their contamination performance. As we have known, composite insulators with different shed profiles have different contamination flashover performances. In this paper, studies mainly focusing on the optimal design of composite insulators' shed. Based on the results of a great deal of artificial contamination test for specimen composite insulators with different profiles, this paper carried out the relationship between the shed parameter and the contamination flashover voltage. By the above work, flashover voltages of composite insulators can be enhanced greatly and the composite insulators will have higher utilization rate of the leakage distance. Therefore, the dimension of towers will be decreased and the cost of transmission systems will be reduced, especially in heavy pollution areas. Accordingly, this work can provide theoretical support of the external insulation design and the selection of insulators for 1000 kV UHV AC transmission projects in China.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129433058","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 : 2010-11-18DOI: 10.1109/ICHVE.2010.5640791
Yingchun He, Youyuan Wang, Weigen Chen, Lin Du, Mingying Chen, Yali Liu
It is conducive to ensuring the safety and reliability of the power system that the timely and accurate evaluation of the reliability of the large generator. A composite evaluation method of the fault probability for the large generator based on the multi-characteristic parameters is proposed in this paper, and it can be employed to solve the difficult problem how the occurrence probability of fault modes of the large generator can be evaluated in the process of the reliability evaluation. Firstly, the set of the fault characteristic parameters for the large generator is established on the basis of the induction and arrangement of a large number of operation experiences and the preventive test code for the large generator. Secondly, according to the features of the fault characteristic parameters, two estimation methods of the fault mode occurrence probability are proposed, which are based on the fuzzy membership function and the relative deterioration degree respectively. Finally, on the basis of the improved analytic hierarchy process (IAHP) method, the composite estimation method of the fault probability for the large generator is presented, which can reasonably and adequately use the information of the various characteristic parameters. An assessment case is provided to illustrate the specific process of this evaluation method and to verify its effectiveness.
{"title":"A multi-parameter evaluation method of large generator fault probability","authors":"Yingchun He, Youyuan Wang, Weigen Chen, Lin Du, Mingying Chen, Yali Liu","doi":"10.1109/ICHVE.2010.5640791","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640791","url":null,"abstract":"It is conducive to ensuring the safety and reliability of the power system that the timely and accurate evaluation of the reliability of the large generator. A composite evaluation method of the fault probability for the large generator based on the multi-characteristic parameters is proposed in this paper, and it can be employed to solve the difficult problem how the occurrence probability of fault modes of the large generator can be evaluated in the process of the reliability evaluation. Firstly, the set of the fault characteristic parameters for the large generator is established on the basis of the induction and arrangement of a large number of operation experiences and the preventive test code for the large generator. Secondly, according to the features of the fault characteristic parameters, two estimation methods of the fault mode occurrence probability are proposed, which are based on the fuzzy membership function and the relative deterioration degree respectively. Finally, on the basis of the improved analytic hierarchy process (IAHP) method, the composite estimation method of the fault probability for the large generator is presented, which can reasonably and adequately use the information of the various characteristic parameters. An assessment case is provided to illustrate the specific process of this evaluation method and to verify its effectiveness.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129441734","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 : 2010-11-18DOI: 10.1109/ICHVE.2010.5640794
R. Barnett, J. H. Nelson
For new installations of 500-kV gas insulated switchgear (GIS) at the Pin Hook, TN USA 500-kV Substation and the Maury, TN USA 500-kV Substation, the Tennessee Valley Authority (TVA) chose to install an advanced 6 gas monitoring system (GMS). This paper will discuss specifics of the GMS and how its use simplifies identification of leaking sections, facilitates planned outages for repair or replacement, and ultimately increases the availability and reliability of the equipment.
{"title":"SF6 gas monitoring and leakage detection in gas insulated switchgear","authors":"R. Barnett, J. H. Nelson","doi":"10.1109/ICHVE.2010.5640794","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640794","url":null,"abstract":"For new installations of 500-kV gas insulated switchgear (GIS) at the Pin Hook, TN USA 500-kV Substation and the Maury, TN USA 500-kV Substation, the Tennessee Valley Authority (TVA) chose to install an advanced 6 gas monitoring system (GMS). This paper will discuss specifics of the GMS and how its use simplifies identification of leaking sections, facilitates planned outages for repair or replacement, and ultimately increases the availability and reliability of the equipment.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128594591","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 : 2010-11-18DOI: 10.1109/ICHVE.2010.5640747
Zhijin Zhang, Haizhou Huang, Xingliang Jiang, Jianlin Hu, Caixin Sun
The electric performance of polluted insulator string may reduce under high altitude. The paper studies the AC pollution flashover performance of insulators at different height of altitude field and chamber climate separately. The test results show that: The deviation between test results with the artificial and field experiments is less than 8%, when the test carried out in climate chamber under low air pressure conditions, the characteristic exponent n describing the influence degree of air pressure on pollution flashover voltage which has influence on the pollution flashover voltage of insulators is mutative, and the value of n is related to the pollution, insulator type etc.. Under AC voltage, n is 0.50~0.60. The composite insulator is superior in external insulation selection in high altitude and heavy polluted areas. The results obtained by the test which carried out in climate chamber can guide the designing of the external insulation.
{"title":"Comparison of AC pollution flashover performance of insulators in chamber with high altitude spots","authors":"Zhijin Zhang, Haizhou Huang, Xingliang Jiang, Jianlin Hu, Caixin Sun","doi":"10.1109/ICHVE.2010.5640747","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640747","url":null,"abstract":"The electric performance of polluted insulator string may reduce under high altitude. The paper studies the AC pollution flashover performance of insulators at different height of altitude field and chamber climate separately. The test results show that: The deviation between test results with the artificial and field experiments is less than 8%, when the test carried out in climate chamber under low air pressure conditions, the characteristic exponent n describing the influence degree of air pressure on pollution flashover voltage which has influence on the pollution flashover voltage of insulators is mutative, and the value of n is related to the pollution, insulator type etc.. Under AC voltage, n is 0.50~0.60. The composite insulator is superior in external insulation selection in high altitude and heavy polluted areas. The results obtained by the test which carried out in climate chamber can guide the designing of the external insulation.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117220938","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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