Pub Date : 2012-11-26DOI: 10.1109/ICHVE.2012.6357088
Wei Hu, Haitao Yang, Jia Yan, Xiao-hui Zhu
Risk assessment is defined to measure the probability and security of risk resources synthetically. In this paper, risk assessment theory is employed firstly to maintenance tactics of transformer, the probability and severity of all failure modes of transformer are measured synthetically, and risk maintenance tactics of usual transformer's failure modes are obtained .Based on these, 5×5 risk matrix and 4 kinds of risk ranges are adopted to express the risk of all transformer's failure modes, and responding risk maintenance strategies are obtained; finally, a example is analysis to verify the correctness of the risk assessment frame and risk maintenance strategies. And the Visual Basic language and the Access database are applied in this paper to design the MIS of the transformer risk management.
{"title":"The transformer fault management information system design based on the risk assessment","authors":"Wei Hu, Haitao Yang, Jia Yan, Xiao-hui Zhu","doi":"10.1109/ICHVE.2012.6357088","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357088","url":null,"abstract":"Risk assessment is defined to measure the probability and security of risk resources synthetically. In this paper, risk assessment theory is employed firstly to maintenance tactics of transformer, the probability and severity of all failure modes of transformer are measured synthetically, and risk maintenance tactics of usual transformer's failure modes are obtained .Based on these, 5×5 risk matrix and 4 kinds of risk ranges are adopted to express the risk of all transformer's failure modes, and responding risk maintenance strategies are obtained; finally, a example is analysis to verify the correctness of the risk assessment frame and risk maintenance strategies. And the Visual Basic language and the Access database are applied in this paper to design the MIS of the transformer risk management.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"12 1","pages":"528-531"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80033094","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.2012.6357035
F. Sadaoui, A. Beroual
This paper deals with the influence of the polarity of voltage of different gases (N2, dry Air, SF6 and CO2) and mixtures (SF6-N2, SF6-dry air and SF6-CO2) on breakdown voltage (UBDV) in a sphere-plane and point-plane electrode arrangements under standard lightning impulse voltage stress. It's shown that in point-plane electrode geometry, the negative breakdown voltage UNBDV is always higher than the positive one (UPBDV) for all investigated gases. While in a sphere-plane electrode system, this rule is not respected. Depending on the electrode gap, the type of gas and its pressure, UNBDV can be either lower than UPBDV (dry air), or first higher and then lower or yet first lower and then higher; the inversion appears at a given pressure that it's not the same according to the gas, gap and polarity. For gas mixtures, UNBDV is always higher than UPBDV whatever SF6 content.
{"title":"Influence of polarity on breakdown voltage of gases in divergent electric field under lightning impulse voltages","authors":"F. Sadaoui, A. Beroual","doi":"10.1109/ICHVE.2012.6357035","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357035","url":null,"abstract":"This paper deals with the influence of the polarity of voltage of different gases (N<sub>2</sub>, dry Air, SF<sub>6</sub> and CO<sub>2</sub>) and mixtures (SF<sub>6</sub>-N<sub>2</sub>, SF<sub>6</sub>-dry air and SF<sub>6</sub>-CO<sub>2</sub>) on breakdown voltage (U<sub>BDV</sub>) in a sphere-plane and point-plane electrode arrangements under standard lightning impulse voltage stress. It's shown that in point-plane electrode geometry, the negative breakdown voltage UNBDV is always higher than the positive one (U<sub>PBDV</sub>) for all investigated gases. While in a sphere-plane electrode system, this rule is not respected. Depending on the electrode gap, the type of gas and its pressure, U<sub>NBDV</sub> can be either lower than U<sub>PBDV</sub> (dry air), or first higher and then lower or yet first lower and then higher; the inversion appears at a given pressure that it's not the same according to the gas, gap and polarity. For gas mixtures, U<sub>NBDV</sub> is always higher than U<sub>PBDV</sub> whatever SF<sub>6</sub> content.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"134 1","pages":"496-499"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75842474","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.2012.6357140
L. Tong, L. Zhihong, L. Ruihai, Zhang Xiaohong, LI Yancheng, Li Ziyun, Du Jinyang, Gao Junguo
Insulation failure is one of the major causes of catastrophic failure of high voltage apparatus. It is important for the study of partial discharge behavior in electrical apparatus to know the degration of insulating materials. This paper focuses on the analysis of acoustic signal produced by partial discharge in insulation oil. The needle-plane electrode system is assembled to simulate the partial discharge in insulation oil. Wavelet transform is used to analyze acoustic signal. The energy distribution of each level and time domain waveform is analyzed. A low-noise amplifier and a de-coupler are used to detect the acoustic signal with high-sensitivity. A digital acquire card is used to get the acoustic signal and save data in computer.
{"title":"Characterization of acoustic signal produced by partial discharge in insulation oil","authors":"L. Tong, L. Zhihong, L. Ruihai, Zhang Xiaohong, LI Yancheng, Li Ziyun, Du Jinyang, Gao Junguo","doi":"10.1109/ICHVE.2012.6357140","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357140","url":null,"abstract":"Insulation failure is one of the major causes of catastrophic failure of high voltage apparatus. It is important for the study of partial discharge behavior in electrical apparatus to know the degration of insulating materials. This paper focuses on the analysis of acoustic signal produced by partial discharge in insulation oil. The needle-plane electrode system is assembled to simulate the partial discharge in insulation oil. Wavelet transform is used to analyze acoustic signal. The energy distribution of each level and time domain waveform is analyzed. A low-noise amplifier and a de-coupler are used to detect the acoustic signal with high-sensitivity. A digital acquire card is used to get the acoustic signal and save data in computer.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"2 1","pages":"422-425"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88747370","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.2012.6357142
Minghui Bao, Shiying Tang, Junjia He, Xiao-ran Yin, Qian Wang, Gaolin Wu, Yan Yang
Since the XLPE cables are widely used in power system and electrical treeing is one of the major breakdown mechanisms for solid dielectrics subjected to high electrical stresses, it's of great importance to study the electrical treeing phenomena in XLPE cable insulation for the improvement of safety and reliability of power system. The process of electrical treeing includes three stages: initiation, propagation and breaking down. In this paper, the initiation phenomena of electrical treeing in XLPE cable insulation are studied. XLPE samples are obtained from a commercial XLPE power cable, in which electrical trees have been grown from pin to plane. The process of electrical treeing in XLPE samples are uninterrupted recorded by an online microphotograph system. The growing time and structure of tree initiation subjected to various voltages, frequencies and pin-plane spacings are analyzed. The results show that trees in different structures have the similar initiation structure. With the larger voltage and shorter pin-plane spacing, the time for initiation was longer and less dispersed. The influence of frequency on initiation is relatively small.
{"title":"The initiation phenomena of electrical treeing in XLPE cable insulation","authors":"Minghui Bao, Shiying Tang, Junjia He, Xiao-ran Yin, Qian Wang, Gaolin Wu, Yan Yang","doi":"10.1109/ICHVE.2012.6357142","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357142","url":null,"abstract":"Since the XLPE cables are widely used in power system and electrical treeing is one of the major breakdown mechanisms for solid dielectrics subjected to high electrical stresses, it's of great importance to study the electrical treeing phenomena in XLPE cable insulation for the improvement of safety and reliability of power system. The process of electrical treeing includes three stages: initiation, propagation and breaking down. In this paper, the initiation phenomena of electrical treeing in XLPE cable insulation are studied. XLPE samples are obtained from a commercial XLPE power cable, in which electrical trees have been grown from pin to plane. The process of electrical treeing in XLPE samples are uninterrupted recorded by an online microphotograph system. The growing time and structure of tree initiation subjected to various voltages, frequencies and pin-plane spacings are analyzed. The results show that trees in different structures have the similar initiation structure. With the larger voltage and shorter pin-plane spacing, the time for initiation was longer and less dispersed. The influence of frequency on initiation is relatively small.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"2 1","pages":"431-434"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88266569","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.2012.6357126
Quan Zhou, Chao Sun, Ke Wu, Di Zou, Jingshu Liao
The space charge distribution of the polymer is an important factor affecting the insulating properties. This paper studies the characteristics of space charge distribution of SiC/LDPE nanocomposites surface modified by the coupling agent KH-560. The experimental results show that the interface between the nano-SiC particles and polyethylene itself is the main source of the trap, and add different nano-particles have different implications on space charge distribution of nanocomposites, and there is a certain inhibition of the charge injection of the same polarity. It can be analyzed that the coupling agent has important implications on the nature and level of the traps, because of the coupling agent KH-560 molecule containing asymmetric side chain and terminal group structure which prone to deep traps with negative polarity tendency. The modified SiC/LDPE nanocomposites have good suppression effect of space charge injection and its migration, which helps enhancing the electrical properties of LDPE.
{"title":"Preparation of SiC/LDPE nanocomposites surface modified by KH-560 and its space charge property","authors":"Quan Zhou, Chao Sun, Ke Wu, Di Zou, Jingshu Liao","doi":"10.1109/ICHVE.2012.6357126","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357126","url":null,"abstract":"The space charge distribution of the polymer is an important factor affecting the insulating properties. This paper studies the characteristics of space charge distribution of SiC/LDPE nanocomposites surface modified by the coupling agent KH-560. The experimental results show that the interface between the nano-SiC particles and polyethylene itself is the main source of the trap, and add different nano-particles have different implications on space charge distribution of nanocomposites, and there is a certain inhibition of the charge injection of the same polarity. It can be analyzed that the coupling agent has important implications on the nature and level of the traps, because of the coupling agent KH-560 molecule containing asymmetric side chain and terminal group structure which prone to deep traps with negative polarity tendency. The modified SiC/LDPE nanocomposites have good suppression effect of space charge injection and its migration, which helps enhancing the electrical properties of LDPE.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"96 3 1","pages":"274-277"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80299478","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.2012.6357019
Xiangdong Xu, T. Bengtsson, J. Blennow, S. Gubanski
Solid dielectric material characterization is commonly performed through measurement of dielectric frequency response. A technique, called arbitrary waveform impedance spectroscopy (AWIS), has been developed as one of its modified versions. It is capable, among other features, of obtaining a broad dielectric response spectrum from one single measurement, provided the applied test voltage is rich in harmonic components. As AWIS is a technique, rather than an instrument, it can be optimized to reach signal to noise ratio in the 106 range. However, both the electrode arrangements as well as the accuracy of the measurement setup limit the precision of the characterization. An air reference method and a contact-free electrode arrangement are presented in this paper for enhancing the dielectric characterization accuracy through avoiding problems introduced by electrode contacts. It is shown that by performing a calibration with electrode gap filled with air under the same conditions as the material is tested, the air reference method can improve the measurement accuracy substantially. This type of approach also eliminates the need for a detailed model of the analog measurement circuit. In conjunction with the contact-free measurements and harmonic-rich waveforms, the approach allows for avoiding complicated and time-consuming sample preparation procedures. Both the measurement methodology as well as the electrode arrangement are presented and evaluated by comparing results obtained with different instruments.
{"title":"Arbitrary waveform impedance spectroscopy for accurate contact-free dielectric characterization","authors":"Xiangdong Xu, T. Bengtsson, J. Blennow, S. Gubanski","doi":"10.1109/ICHVE.2012.6357019","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357019","url":null,"abstract":"Solid dielectric material characterization is commonly performed through measurement of dielectric frequency response. A technique, called arbitrary waveform impedance spectroscopy (AWIS), has been developed as one of its modified versions. It is capable, among other features, of obtaining a broad dielectric response spectrum from one single measurement, provided the applied test voltage is rich in harmonic components. As AWIS is a technique, rather than an instrument, it can be optimized to reach signal to noise ratio in the 106 range. However, both the electrode arrangements as well as the accuracy of the measurement setup limit the precision of the characterization. An air reference method and a contact-free electrode arrangement are presented in this paper for enhancing the dielectric characterization accuracy through avoiding problems introduced by electrode contacts. It is shown that by performing a calibration with electrode gap filled with air under the same conditions as the material is tested, the air reference method can improve the measurement accuracy substantially. This type of approach also eliminates the need for a detailed model of the analog measurement circuit. In conjunction with the contact-free measurements and harmonic-rich waveforms, the approach allows for avoiding complicated and time-consuming sample preparation procedures. Both the measurement methodology as well as the electrode arrangement are presented and evaluated by comparing results obtained with different instruments.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"27 1","pages":"170-173"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82313860","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.2012.6357081
Xiaohua Liu, Zhijin Zhang, Kai Zheng, Wen-jie Li, Guoqiang Yang
It is important to study the natural characteristic of pollution accumulation and flashover performance of insulator energized the operating voltage. This paper mainly focus on the insulator strings operating in a 500kV power network in Chongqing, tests and analyzes the pollution depositing rules and flashover performance of them. Test results indicate that: the value of equivalent salt deposit density (ESDD) on the top surface of insulator is lower than that on the bottom, as well as the value of non-soluble deposit density (NSDD);the accumulation rate of NSDD is heavier than that of ESDD; electric field distribution and precipitation exert a strong influence on the insulator obviously; at the same pollution level, the flashover voltage of natural contaminated insulator is 2 times as high as that of artificial polluted insulator, which mainly caused by the difference of pollution materials and non-uniform pollution distribution on the insulator surface. The results of this paper may be the reference for external insulation coordination and design in the pollution area.
{"title":"Analysis of the pollution accumulation and pollution flashover performance of outdoor 500kV insulator string","authors":"Xiaohua Liu, Zhijin Zhang, Kai Zheng, Wen-jie Li, Guoqiang Yang","doi":"10.1109/ICHVE.2012.6357081","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357081","url":null,"abstract":"It is important to study the natural characteristic of pollution accumulation and flashover performance of insulator energized the operating voltage. This paper mainly focus on the insulator strings operating in a 500kV power network in Chongqing, tests and analyzes the pollution depositing rules and flashover performance of them. Test results indicate that: the value of equivalent salt deposit density (ESDD) on the top surface of insulator is lower than that on the bottom, as well as the value of non-soluble deposit density (NSDD);the accumulation rate of NSDD is heavier than that of ESDD; electric field distribution and precipitation exert a strong influence on the insulator obviously; at the same pollution level, the flashover voltage of natural contaminated insulator is 2 times as high as that of artificial polluted insulator, which mainly caused by the difference of pollution materials and non-uniform pollution distribution on the insulator surface. The results of this paper may be the reference for external insulation coordination and design in the pollution area.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"103 1","pages":"250-253"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77846316","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.2012.6357131
Dibo Wang, Ju Tang, R. Zhuo, Jun-yi Lin, Jian-rong Wu, Xiao-xing Zhang
With changes in insulated defects, the environment, and so on, new partial discharge (PD) data are highly different from the original samples. It leads to a decrease in on-line recognition rate. Using ultra-high frequency (UHF) cumulative energy and its corresponding apparent discharge as inputs, a support vector machine (SVM) incremental method based on simulated annealing (SA) is constructed. Examples show that the new method speeds up the data update rate and improves the adaptability of the classifier.
{"title":"SA-SVM incremental algorithm for GIS PD pattern recognition","authors":"Dibo Wang, Ju Tang, R. Zhuo, Jun-yi Lin, Jian-rong Wu, Xiao-xing Zhang","doi":"10.1109/ICHVE.2012.6357131","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357131","url":null,"abstract":"With changes in insulated defects, the environment, and so on, new partial discharge (PD) data are highly different from the original samples. It leads to a decrease in on-line recognition rate. Using ultra-high frequency (UHF) cumulative energy and its corresponding apparent discharge as inputs, a support vector machine (SVM) incremental method based on simulated annealing (SA) is constructed. Examples show that the new method speeds up the data update rate and improves the adaptability of the classifier.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"4 1","pages":"388-391"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75249587","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.2012.6357147
Bo Niu, Sen Wang, L. Pu, Zhizhong Li, Peng Zhang
According to the characteristics of sending data on schedule of distributed sensor of transmission lines, a kind of uninterruptible power supply solution using a combination of independent solar power supply, battery and super capacitor hybrid energy storage is put forward in this paper. In this solution, the control strategy of Maximum Power Point Tracking (MPPT) that only sampling the input current is used to achieve maximum power point for solar modules, power converter is used with parallel mode to achieve the battery and super capacitor hybrid energy storage. The new power supply system has a higher energy density and power density. When distributed sensors communicating, at wide temperature range, the new power supply system can instantaneous output high power. At the same time, the solution can make the output current of the battery less volatile, prolong the life of the entire system and reduce the capacity and size of the entire power system, and improve power system stability.
{"title":"Development of a new power supply system of distributed sensors of transmission lines","authors":"Bo Niu, Sen Wang, L. Pu, Zhizhong Li, Peng Zhang","doi":"10.1109/ICHVE.2012.6357147","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357147","url":null,"abstract":"According to the characteristics of sending data on schedule of distributed sensor of transmission lines, a kind of uninterruptible power supply solution using a combination of independent solar power supply, battery and super capacitor hybrid energy storage is put forward in this paper. In this solution, the control strategy of Maximum Power Point Tracking (MPPT) that only sampling the input current is used to achieve maximum power point for solar modules, power converter is used with parallel mode to achieve the battery and super capacitor hybrid energy storage. The new power supply system has a higher energy density and power density. When distributed sensors communicating, at wide temperature range, the new power supply system can instantaneous output high power. At the same time, the solution can make the output current of the battery less volatile, prolong the life of the entire system and reduce the capacity and size of the entire power system, and improve power system stability.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"229 1","pages":"358-362"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77582173","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.2012.6357106
Junru Xiang, Jian Li, Zhaotao Zhang
Natural ester dielectric fluid is now available as substitute for conventional mineral oil and has already been widely used in distribution transformers. The influence of water content on the aging performance of natural ester-paper insulation is compared with that of mineral oil-paper insulation. Sealed stainless vessels containing copper, insulating paper with different initial water content and dielectric fluid (camellia oil based natural ester and mineral oil) were aged at 130 °C for 80 days. The degree of polymerization (DP) of paper, furfural concentration in oil and acid number in oil were measured during the aging. The results show that the water could accelerate the aging of insulating paper in both natural ester and mineral oil, while the degradation rate of insulating paper in natural ester is much lower than that in mineral oil. The mechanism of the slower degradation rate in natural ester is discussed.
{"title":"Influence of water content on the aging performance of natural ester-paper insulation","authors":"Junru Xiang, Jian Li, Zhaotao Zhang","doi":"10.1109/ICHVE.2012.6357106","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357106","url":null,"abstract":"Natural ester dielectric fluid is now available as substitute for conventional mineral oil and has already been widely used in distribution transformers. The influence of water content on the aging performance of natural ester-paper insulation is compared with that of mineral oil-paper insulation. Sealed stainless vessels containing copper, insulating paper with different initial water content and dielectric fluid (camellia oil based natural ester and mineral oil) were aged at 130 °C for 80 days. The degree of polymerization (DP) of paper, furfural concentration in oil and acid number in oil were measured during the aging. The results show that the water could accelerate the aging of insulating paper in both natural ester and mineral oil, while the degradation rate of insulating paper in natural ester is much lower than that in mineral oil. The mechanism of the slower degradation rate in natural ester is discussed.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"213 1","pages":"663-666"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73979266","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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