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HVDC system for a data center equipped with SiC power devices 数据中心的高压直流系统配备了SiC功率器件
2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-23 DOI: 10.1109/ICEPE-ST.2011.6123022
T. Ninomiya, A. Fukui, M. Mino, M. Yamasaki, Yasunori Tanaka, H. Ohashi
{"title":"HVDC system for a data center equipped with SiC power devices","authors":"T. Ninomiya, A. Fukui, M. Mino, M. Yamasaki, Yasunori Tanaka, H. Ohashi","doi":"10.1109/ICEPE-ST.2011.6123022","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123022","url":null,"abstract":"SiC power devices have attracted attention as the next-generation semiconductor devices that surpass silicon devices. The SiC has some superior physical properties when compared with the conventional silicon, and is expected to operate with lower on-resistance and under higher temperature. Furthermore the SiC device has higher thermal conductivity and then has the prominent feature of heat dissipation. Among many expected applications of SiC, this paper presents the application to the power supply system for the information and communication system such as a data center. Firstly, the development of a high power-density technology for a 5-kW isolated DC-DC converter using a hybrid-pair of Si-MOSFET and SiC-SBD is reported. Secondly, a new type DC circuit breaker using SiC-SIT is introduced.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127985887","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}
引用次数: 3
Studies of high current arcs using an optical fiber array based imaging system 基于光纤阵列成像系统的大电流电弧研究
2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-04 DOI: 10.1109/ICEPE-ST.2011.6123034
J. McBride, K. Cross
{"title":"Studies of high current arcs using an optical fiber array based imaging system","authors":"J. McBride, K. Cross","doi":"10.1109/ICEPE-ST.2011.6123034","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123034","url":null,"abstract":"A portable arc imaging system is presented for the study of high speed and high temperature unsteady plasma flows such as those found in the vicinity of high current switching arcs. The system permits direct measurement of arc light emission images with a capture rate of 1 million images per second (1MHz), and 8 bit intensity resolution. Novel software techniques are reported to visualise the arc motion and to measure arc trajectories. Results are presented on high current (2kA) discharge events where the electrode and arc runner surfaces are investigated using optical surface scanning methods; such that the position of the arc roots on the runner can be correlated to the measured trajectories. The results show evidence of the cathode arc root stepping along the arc runners.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"470 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133246970","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}
引用次数: 3
Partial discharge in vacuum on insulator surface under AC voltage application 交流电压作用下绝缘子表面真空局部放电
2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6123044
H. Kojima, K. Aoki, N. Hayakawa, M. Hanai, M. Homma, T. Shioiri, H. Okubo
{"title":"Partial discharge in vacuum on insulator surface under AC voltage application","authors":"H. Kojima, K. Aoki, N. Hayakawa, M. Hanai, M. Homma, T. Shioiri, H. Okubo","doi":"10.1109/ICEPE-ST.2011.6123044","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123044","url":null,"abstract":"In high voltage vacuum apparatus, e.g. vacuum circuit breaker, a partial discharge phenomenon, which is not breakdown but has a potential to lead breakdown, is observed under AC voltage application. We investigate the partial discharge along an insulator surface in vacuum under AC voltage application by the measurement of the charging and the light emission. Under sudden AC high voltage application, the partial discharge along the alumina surface occurred at the peak voltage of both polarities, but mainly at the negative polarity. The partial discharge was initiated near the rod electrode and spread out over the whole alumina surface. The partial discharge and subsequent charging behavior on the alumina surface under AC voltage application was verified to be dominated by the distortion of electric field due to not only the negative charges on the alumina surface but also the decrease phase of applied AC voltage.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127122300","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}
引用次数: 4
Intermediate-frequency vacuum arc movement on TMF contacts TMF触点上的中频真空电弧运动
2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6123048
Z. Liying, Wu Jianwen, Liu Bin, Sun Yihang
{"title":"Intermediate-frequency vacuum arc movement on TMF contacts","authors":"Z. Liying, Wu Jianwen, Liu Bin, Sun Yihang","doi":"10.1109/ICEPE-ST.2011.6123048","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123048","url":null,"abstract":"In this paper, the morphological changes at intermediate frequency (400Hz∼800Hz) were investigated under transverse magnetic field (TMF). The experiment was performed on a cup-type TMF contact with a contact diameter of 66mm and a contact gap of 4mm in single-frequency circuit. With high-speed photography, three different arc modes were identified: arc column expansion, arc column movement and diffuse arc. At the arc column expansion mode, the arc column is immobility and the diameter of arc column increases with the increasing current. At the arc column movement mode, arc velocity between 10m/s – 100m/s was observed. The arc column expansion mode plays an important role in the anode erosion in the intermediate-frequency vacuum arc. Furthermore, the arc velocity increases almost linearly with the total current at the same frequency. As the current frequency increase, the arc velocity also increases at the same current.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"278 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114482339","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}
引用次数: 2
Electrical endurance capability of vacuum circuit breakers: Standards and tests results for MV equipment 真空断路器的电气耐久性能。中压设备标准和试验结果
2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6122939
G. Sandolache, L. Gaches, S. Melquiond, S. Chakraborty
{"title":"Electrical endurance capability of vacuum circuit breakers: Standards and tests results for MV equipment","authors":"G. Sandolache, L. Gaches, S. Melquiond, S. Chakraborty","doi":"10.1109/ICEPE-ST.2011.6122939","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6122939","url":null,"abstract":"Electrical endurance capability of circuit breakers is mostly demanded for sound economic reasons in order to verify the cumulative energy that may be interrupted without maintenance during the lifetime of the equipment. Reliability of the vacuum circuit breakers has been proven by superior electrical endurance at short-circuits current. Standards, particularly IEC, ANSI, JT, GB, GOST, present various test programs relative to the electrical endurance E2 class ability, the differentiation between being done by the type and number of operating sequences, testing current and successful criteria to pass the test. The paper presents the electrical endurance results obtained in respect with different standard testing programs for MV circuit breaker 40kV/ 25kA.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126532400","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}
引用次数: 0
High frequency model of metal-oxide surge arrester for researching on VFTO 用于VFTO研究的金属氧化物避雷器高频模型
2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6123057
Lin Xin, Wang Jing, Xu Jianyuan
{"title":"High frequency model of metal-oxide surge arrester for researching on VFTO","authors":"Lin Xin, Wang Jing, Xu Jianyuan","doi":"10.1109/ICEPE-ST.2011.6123057","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123057","url":null,"abstract":"In the simulation of very fast transient over-voltage (VFTO), establishing the accurate equivalent model of electrical equipments in GIS has a major effect on the calculation results. At present, nonlinear resistance model based on static V-I characteristics is used for metal-oxide surge arrester (MOA) when simulating the VFTO in GIS. But the result is not accurately, because polarization in high frequency electric field is neglected by this model. In this paper, combined with the conductive process of grain and grain boundary in the microstructure of arrester valve piece, based on the polarization theory in alternating electric field, the high frequency circuit model of arrester is proposed, and the model can accurately simulate polarization process of arrester in high frequency electric field by comparing the simulation and the actual waveform. Then based on a GIS in China, the VFTO is simulated with the high frequency model, and the effect of MOA on VFTO amplitude, spectrum characteristics and gradient are analyzed. The simulation results show that, MOA has some inhibitory effect on the amplitude and steepness of VFTO, especially for the equipments that nearing the arrester. In addition, the nearer equipment from the arcing disconnector, the greater steepness on it, conversely, the farther from the disconnector, the steepness is lower. The result has some practical significance for calculating and analyzing VFTO.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133029400","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}
引用次数: 4
The wavelets transformation fault line selection method based on rough sets signal enhancement 基于粗糙集信号增强的小波变换故障选线方法
2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6123000
Lingling Li, S. Huang, FengQiang Li, Hua Li, Huijuan Zhang
{"title":"The wavelets transformation fault line selection method based on rough sets signal enhancement","authors":"Lingling Li, S. Huang, FengQiang Li, Hua Li, Huijuan Zhang","doi":"10.1109/ICEPE-ST.2011.6123000","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123000","url":null,"abstract":"The wavelets transformation theory is a powerful way to process transient information in small current grounding system. But the limitation of sampling frequency may lead the information dropout of zero-sequence-current. Rough set has great abilities of knowledge discovery and data mining. It can enhance zero-sequence-current and overcome the boundedness of wavelets fault line selection method. The MATLAB simulation results proved through the preproceses by rough set, the accuracy of the wavelets fault line selection method was improved.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133408220","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}
引用次数: 1
Finite element methode analysis of performance of inductive saturable-core fault current limiter 电感式饱和铁心故障限流器性能的有限元分析
2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6123006
Y. Shahbazi, K. Niayesh, H. Mohseni
{"title":"Finite element methode analysis of performance of inductive saturable-core fault current limiter","authors":"Y. Shahbazi, K. Niayesh, H. Mohseni","doi":"10.1109/ICEPE-ST.2011.6123006","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123006","url":null,"abstract":"Due to the increased interconnection of networks and the growth in the use of new power plants, fault current levels in power system continue to rise. One of the viable solutions for handling this issue is the use of fault current limiters (FCL) to reduce the short circuit current. FCLs can be classified in three groups: passive, solid-state and hybrid FCLs. Passive FCLs have merit to inherently react on a fault, requiring no fault detection and triggering circuit. Inductive FCLs based on core saturation belong to this group. In this paper, magnetic flux density distribution in inductive saturable core FCL has been obtained before and after fault using a multiphysics simulation tool (COMSOL) and ψ-I curve has been obtained for steel-1008 core with COMSOL and Matlab. FCL effects on circuit have been analyzed in EMTP and it has been observed that the fault current will decrease significantly.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"432 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133648342","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}
引用次数: 7
Self-calibration method of vacuum level measuring sensors in vacuum switching 真空开关中真空液位测量传感器的自校准方法
2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6122980
Zhizhong Zhao, Liguo Ma, Jingyuan Wang
{"title":"Self-calibration method of vacuum level measuring sensors in vacuum switching","authors":"Zhizhong Zhao, Liguo Ma, Jingyuan Wang","doi":"10.1109/ICEPE-ST.2011.6122980","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6122980","url":null,"abstract":"In same coordinate system with discharge current as x-axis and vacuum level as y-axis, calibration curves of different vacuum interrupters are similar in shapes; therefore, a calibration curve for an idiographic vacuum interrupter can be obtained by shifting the general calibration curve along x-axis. Because the vacuum level measured by the manufacturer is the most accurate, its level is set as the base value. Then an increment of shift should be found: it is the x-axis difference value between the general calibration curve and the value measured when this vacuum interrupter leaves factory. After which, an idiographic calibration curve can be obtained by shifting the general calibration curve on x-axis by the increment. Thus, a self-calibration method is realized, which leads to an improvement of measurement accuracy. In this paper, the shifting of curves is realized by two kinds of methods: direct increment and curve fitting. This self-calibration method can be applied to various vacuum level measuring systems of vacuum interrupters.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127864697","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}
引用次数: 0
The influence of electrodes resistance on arc motion between a pair of parallel electrodes 电极电阻对一对平行电极间电弧运动的影响
2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6123160
Ruiliang Guan, Hongwu Liu, Yanfeng He, Nairui Yin
{"title":"The influence of electrodes resistance on arc motion between a pair of parallel electrodes","authors":"Ruiliang Guan, Hongwu Liu, Yanfeng He, Nairui Yin","doi":"10.1109/ICEPE-ST.2011.6123160","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123160","url":null,"abstract":"In this paper, an arc runner model is developed to study behaviors of the arc motion for different current levels and resistance of arc runners. By using high speed CCD camera the arc movements are observed and the influence of resistor of arc runners is analyzed. According to experiment results of the arc motion between parallel poles, for the certain configuration the increase of the pole resistance can reduce the speed of arc motion. However, with the increase of the current, this effect fades gradually. A simplified mathematical model is proposed to explain the reason for the resistance of the arc runner delays arc motion. Without considering the fluid characteristic of the arc, further work may be done to analyze the phenomena that with the higher current, the arc delay effect of resistance fades.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"11 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134621588","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}
引用次数: 0
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