2019 IEEE Electrical Insulation Conference (EIC)最新文献_第9页

Material Temperature Dependence on Behavior of Partial Discharge in Epoxy Resin 材料温度对环氧树脂局部放电行为的影响

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046603

T. Sakoda, Mitsuki Kawakone, Noriyuki Hayshi, M. Setoguchi

{"title":"Material Temperature Dependence on Behavior of Partial Discharge in Epoxy Resin","authors":"T. Sakoda, Mitsuki Kawakone, Noriyuki Hayshi, M. Setoguchi","doi":"10.1109/EIC43217.2019.9046603","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046603","url":null,"abstract":"For epoxy resin equipment, voids may exist owing to imperfection of insulation manufacturing. The electric field becomes high in the voids, and partial discharges (PDs) occur in such defects. Incidentally, the insulation material temperature varies with the status of load and the environmental condition. It is crucial to investigate PD activity at diffe re nt void te mpe rature and electric field. In this study, we carried out measurements of PDs in an artificial void of epoxy resin at various temperatures in the range of 30_50 degrees Celsius. The maximum electric fields in the void 1.5 mm in diameter were set at 4.6 kV/mm and 8.0 kV/mm. For a 4.6 kV/mm-void, the number of PDs was large at lower temperature at around 30 degrees Celsius. The number of PDs de cre ase d with the incre ase of the numbe r of te mpe rature-time cycles. The PD magnitude slightly incre ase d with the increase of temperature because the dielectric constant of epoxy resin might become high and the electric field in a void might become high. In contrast, the variation tendency of the number of PDs for an 8 kV/mm-void was much different from that for a 4.6 kV/mm-void. The number of PDs was large at around 50 degrees Celsius and in the middle of temperature rising from 40 to 50 degrees Celsius. Thus, we investigated that PD behavior during temperature-time cycles differs in electric field.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128934112","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

Water Tree Detection in Medium Voltage XLPE Cables 中压交联聚乙烯电缆中的水树检测

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046547

W. McDermid, M. Partyka, T. Black

{"title":"Water Tree Detection in Medium Voltage XLPE Cables","authors":"W. McDermid, M. Partyka, T. Black","doi":"10.1109/EIC43217.2019.9046547","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046547","url":null,"abstract":"During the period of 1993–1995 Manitoba Hydro investigated the claim by a service provider that water trees could be detected and located in service aged medium voltage XLPE cables by means of time domain reflectometry (TDR) following conditioning of the cable dielectric with direct voltage. In order to avoid subsequent short time in-service failures, it was necessary to limit the conditioning voltage to 0.5 per-unit. With this restriction, no conditioning related surge impedance anomalies were found in cable that subsequently was determined as containing substantial vented water trees. However, it was established that the measurement of leakage current at 0.5 per-unit negative polarity direct voltage did correlate with the magnitude of subsequent 0.1 Hz breakdown voltage. Beginning in 2014 Manitoba Hydro has been assessing service aged medium voltage XLPE cables using Tangent Delta measurements at 0.1 Hz voltages in accordance with IEEE Std 400.2. However, the notion that water tress can be detected and located as a result of conditioning with direct voltage is still of interest as is indicated by publications that have appeared in the literature in recent years, but the related conditioning utilizes direct voltages in excess of 0.5 per-unit.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124105053","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

Study of partial discharge detection in motors fed by SiC MOSFET and Si IGBT inverters SiC MOSFET和Si IGBT逆变器驱动电机局部放电检测的研究

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046536

R. Acheen, C. Abadie, T. Billard, T. Lebey, S. Duchesne

{"title":"Study of partial discharge detection in motors fed by SiC MOSFET and Si IGBT inverters","authors":"R. Acheen, C. Abadie, T. Billard, T. Lebey, S. Duchesne","doi":"10.1109/EIC43217.2019.9046536","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046536","url":null,"abstract":"Voltage inverters based on the pulse width modulation are widely used for applications that require controlling rotation speed. The devices used today to create pulse width modulation are Silicon (Si) IGBTs. The use of IGBTs enables to generate rising edges of tens of kV /µs, and to reach switching frequencies around 20 kHz. These improvements have helped to reduce switching losses and motor torque ripple. On the other hand, the reliability of motors has declined dramatically. The causes of motor failures may be due to different phenomena, but one of the main ageing mechanisms is the erosion of the different insulation materials induced by Partial Discharges (PD). For high voltage, high power and/or high frequency applications, silicon carbide (SiC) based components will in most of the case replace the current silicon-based components. If some works have already been achieved for on-line PD detection in low voltage motors fed by inverters using Si-IGBT technology, works are now needed when SiC-based components are used. For motors fed by low voltage, PDs mainly occur during the voltage edge. It is therefore necessary to discriminate them from the noise induced by switchings. The use of high pass filters proved its effectiveness for IGBTs but the use of SiC MOSFET will result in an increase of switching speed and consequently an increase of the noise frequency. For such conditions, it may be difficult to differentiate partial discharges from noise. This paper presents a study on the partial discharge inception voltage, on the ability to detect partial discharges and on the voltage stresses in motors supplied by SiC-MOSFET and Si-IGBT inverters. These results are discussed and possible strategies are proposed.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130426461","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: 5

Diagnostic Technique for Electrical Tree by Current Integration Method 电流积分法电工树诊断技术

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046562

S. Iwata, Ryota Kitani, T. Takada

{"title":"Diagnostic Technique for Electrical Tree by Current Integration Method","authors":"S. Iwata, Ryota Kitani, T. Takada","doi":"10.1109/EIC43217.2019.9046562","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046562","url":null,"abstract":"The degradation of insulating property of polymeric materials was evaluated by the new diagnostic technique of current integration system, hereafter referred to as the “Q(t)-meter”. The Q(t)-meter measures the change with time in integrated charge accumulated by a capacitor inserted between a DC high-voltage power supply and a sample of the insulation material under study. Q(t)-meter is suitable for the monitoring of time dependence of leakage current of the insulating sample under DC voltage. To demonstrate the performance of this new device, we evaluated the influence of generation and propagation of “electrical tree” in epoxy resin sample on DC leakage current. The electrical tree is a typical electrical degradation of polymeric materials. Hence, nondestructive diagnostic methods for electrical tree are expected. In this study, the electrical tree was generated in the epoxy resin by AC high voltage between two needle electrodes. The interelectrode distance was 2 mm. In the Q(t) measurement, the sampling frequency, total sampling time, DC applied time, and test voltages were 2 s, 600 s, 900 s, 250-1,000 V, respectively. We conducted Q(t) measurement at three stages of electrical treeing - before tree generation, after tree generation, and after tree propagation. It was found that the leakage current increased with increase in the tree length. A remarkable trend of steep rise and fall in the Q(t) curve was also observed. Experimental results obtained by the Q(t)-meter were analyzed assuming an “RC circuit model”.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126386806","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

Searching for Optimal Connection Schemes for Partial Discharge Testing of Inverter-Fed Rotating Machines 变频调速旋转电机局部放电试验的最佳连接方案研究

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046521

A. Cavallini, Luca Lusardi, A. Rumi, K. Kimura, A. Contin, T. Han

引用次数: 0

A High Voltage Capacitor Element Model 高压电容器元件模型

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046637

C. Mackinnon, B. Stewart

引用次数: 2

Electrical Performance of HTV Silicone Rubber under Different Fillers and Filler Loadings HTV硅橡胶在不同填料和填料负荷下的电性能

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046623

S. Ilhan, D. Tuzun, A. Ozdemir

引用次数: 3

Compatibility of Mica Binder Resins with Medium and High Voltage Impregnation Resins 云母粘结树脂与中高压浸渍树脂的相容性研究

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046537

T. Nguyen

引用次数: 0

Dielectric and Insulation Properties of Polyimide-based Boehmite Nanocomposite Material 聚酰亚胺基薄水铝石纳米复合材料的介电和绝缘性能

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046530

T. Matsuzoe, N. Kita, Y. Nishigaki, Tsuyoshi Abe, Tomohiro Kubo, Y. Nakano, M. Kozako, M. Hikita, N. Fujimoto, N. Hayashizaka, S. Fujimoto, Toshihiko Kato

{"title":"Dielectric and Insulation Properties of Polyimide-based Boehmite Nanocomposite Material","authors":"T. Matsuzoe, N. Kita, Y. Nishigaki, Tsuyoshi Abe, Tomohiro Kubo, Y. Nakano, M. Kozako, M. Hikita, N. Fujimoto, N. Hayashizaka, S. Fujimoto, Toshihiko Kato","doi":"10.1109/EIC43217.2019.9046530","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046530","url":null,"abstract":"In recent years, small and medium size generators are used as engine generators. The authors aim to develop enamelled wire that exceeds conventional resin insulation lifetime. Among nanocomposite materials, boehmite-based materials are reported to have a longer lifetime than silica-based materials, and they are expected as new insulating materials for enamel wire insulation layer. In this paper, we report on the effect of boehmite filler on dielectric properties and AC conductivity by acquiring complex permittivity and AC conductivity of a film sample with nano-boehmite alumina added to polyimide resin compared with those of samples with silica nano-fillers and without nano-fillers. As a result, it is suggested that the ionic carrier is more likely to move in the polyimide sample with AIOOH filler than in the neat sample in the high temperature region of 180 °C. From the above results, it is considered that the conductivity and the relative permittivity increase in the high temperature and low frequency region are due to the influence of crystal water of boehmite. In addition, measurements of life time of enamel twisted pair samples coated with polyimide filled with boehmite alumina nano-filliers were also made with comparison to that of samples without the boehmite alumina fillers.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125502516","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

Computation of the Corona Onset Voltage for DC at Two Different Altitudes 两种不同高度直流电晕起始电压的计算

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046627

R. Cortés, F. E. Cortes, R. Linares y Miranda, A. Ozdemir, S. Ilhan

引用次数: 0