2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)最新文献_第4页

Electrical Insulation Design and Accurate Estimation of Temperature via an Electrothermal Model for a 10 kV SiC Power Module Packaging 基于电热模型的10kv SiC电源模块封装电绝缘设计及精确温度估算

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437513

M. Tousi, M. Ghassemi

引用次数: 5

Electrical Breakdown Characteristics of Supercritical Trifluoroiodomethane-Carbon Dioxide (CF3I-CO2) Mixtures 超临界三氟碘甲烷-二氧化碳(CF3I-CO2)混合物电击穿特性

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437475

Jia Wei, A. Cruz, F. Haque, Chanyeop Park, L. Graber

{"title":"Electrical Breakdown Characteristics of Supercritical Trifluoroiodomethane-Carbon Dioxide (CF3I-CO2) Mixtures","authors":"Jia Wei, A. Cruz, F. Haque, Chanyeop Park, L. Graber","doi":"10.1109/CEIDP49254.2020.9437475","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437475","url":null,"abstract":"Supercritical fluids (SCFs), as a new type of dielectric medium, combine highly desirable properties of gaseous and liquid dielectrics, most notably: low viscosity, high heat transfer capability, and high dielectric strength. This paper, for the first time, reports the results of breakdown experiments on the mixture of trifluoroiodomethane (CF3I) and carbon dioxide (CO2) under the supercritical conditions. Experiments were conducted in a 0.1 mm gap under a uniform electric field. The state of substance during experiments was obtained by the calculation from the equation of state (EoS), and by evaluating the optical appearance. The experiment result shows a dielectric strength of the supercritical CF3I-CO2 mixture at an average of 278 kV/mm with a 10% CF3 I mass fraction. Our experiments also suggest that the dielectric behavior of this supercritical CF3I-CO2 mixture manifests a discontinuity of the dielectric strength near the critical point. This paper indicates the suitability of using supercritical CF3I-CO2 mixture for high power density applications.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132064903","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

Mechanism of Insulation Lifetime Extension of Epoxy/TiO2 Nanocomposites with Enclosed Void 封闭孔洞环氧/TiO2纳米复合材料绝缘寿命延长机理研究

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437487

T. Umemoto, S. Yoshida, H. Muto, M. Kurimoto

引用次数: 0

Comparison of PD Patterns Obtained by Conventional Conducted Signals Measurement and TEV Sensor During Electrical Ageing Tests 电老化试验中传统传导信号测量与TEV传感器PD模式的比较

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437528

F. Guastavino, L. Briano, A. Bruzzone, F. Gallesi, E. Torello

{"title":"Comparison of PD Patterns Obtained by Conventional Conducted Signals Measurement and TEV Sensor During Electrical Ageing Tests","authors":"F. Guastavino, L. Briano, A. Bruzzone, F. Gallesi, E. Torello","doi":"10.1109/CEIDP49254.2020.9437528","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437528","url":null,"abstract":"The conventional Partial Discharges (PDs) measurement systems, IEC60270 compliant, normally use a quadripole as coupling device to convert the current pulses to output voltage signals when the system bandwidth is in the frequency range from 40 kHz to 1 MHz. This kind of measurement usually needs an off-line measure and an invasive procedure to connect the objects under test to the measurement system. Other measurement systems based on non-invasive sensors like High Frequency Current Transformer (HFCT) and Transient Earth Voltage (TEV) could be used if the provided results give comparable response. Focusing on TEV sensors, they can be coupled to measurement systems having a frequency bandwidth out of the range defined in IEC60270 standard. The comparison among TEV measurement system and those IEC60270 compliant can be based on the derived and statistical quantities computed starting from the PD pattern. PD Patterns have been collected during electrical ageing test applied to twisted pair located in an air insulated medium voltage switchgear (AIMVS).","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"14 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131653310","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

A Dissolved Gas Analysis Investigation of Natural Ester under Electrical Breakdown Faults 电击穿故障下天然酯溶解气体分析研究

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437454

C. Zhang, J. Liao, L. Zhong, H.Q. Li, J. W. Chu, S. Yu, Y. Zheng, X. Liu

引用次数: 1

Simulation on Electrostrictive-force induced Cavitation Formation Process in Cyclohexane 电致伸缩力诱导环己烷空化过程的模拟

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437538

Donglin Liu, Qiang Liu, Zhangdong Wang

{"title":"Simulation on Electrostrictive-force induced Cavitation Formation Process in Cyclohexane","authors":"Donglin Liu, Qiang Liu, Zhangdong Wang","doi":"10.1109/CEIDP49254.2020.9437538","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437538","url":null,"abstract":"Streamer, known as the pre-breakdown process, has been widely studied in insulating liquids such as mineral oil. Due to the complexity of the composition of mineral oil, cyclohexane, a simple hydrocarbon-based liquid is often used in some fundamental studies. The mechanism during streamer initiation stage may differ under different voltage rising rates. Cavitation is likely to form under fast-rising voltage, which helps to trigger streamer initiation due to the acceleration of electrons inside the cavities. This paper simulates the electrostrictive force induced cavitation formation process in cyclohexane and its influencing factors. Cyclohexane is considered as compressible liquid. The threshold of cavitation formation in cyclohexane is estimated to be −6 MPa. Coupled Poisson equation and Navier-stoke equations are solved by finite element method in COMSOL Multiphysics for cavitation formation simulation. A needle-plane geometry is used and different voltage rising rates are modelled. Simulation results show that it is possible for electrostrictive force to lead to cavitation formation in the vicinity of needle tip in cyclohexane under fast rising voltage. The liquid is pushed towards the needle tip due to the electrostrictive force. Voltage application with slower rising rate leads to more liquids to move but requires higher voltage magnitude to form cavitation. The absolute value of the minimum magnitude of negative pressure in cyclohexane increases with the increase of voltage rising rate.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"309 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123147318","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

DC Breakdown Modulated by Molecular Chains Movements and Trap Characteristics of HDPE/LDPE Blend Insulation 分子链运动调制HDPE/LDPE共混绝缘的直流击穿及陷阱特性

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437489

M. Fan, Zhonglei Li, S. Zhou, B. Du

{"title":"DC Breakdown Modulated by Molecular Chains Movements and Trap Characteristics of HDPE/LDPE Blend Insulation","authors":"M. Fan, Zhonglei Li, S. Zhou, B. Du","doi":"10.1109/CEIDP49254.2020.9437489","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437489","url":null,"abstract":"Polyethylene (PE) is an environmentally friendly material, and is generally used as cable insulation materials. This paper mainly researches the coupling effect of dielectric polarization behaviors and traps level characteristics on direct current (DC) electrical breakdown performance of five high density/low density polyethylene (HDPE/LDPE) blends specimens. HDPE/LDPE specimens are prepared by high temperature blending and hot-press forming methods. Broadband dielectric spectroscopy (BDS) and isothermal decay current (IDC) measurements are employed to reveal the dielectric polarization behaviors and traps level characteristics of five HDPE/LDPE specimens. A novel molecular chains movement model is employed to investigate the mechanism of the molecular chains movements in the HDPE/LDPE dielectrics. The breakdown field strength of five HDPE/LDPE specimens reaches maximum when the HDPE content increases to 15 wt%, and then decreases with a further addition of HDPE to 20 wt%. The dielectric relaxation polarization a is attributed to molecular chains movements in HDPE/LDPE blends, and a behavior intensity (Δ εα) increases with the HDPE content from 0 to 5 wt%, and then reduces with a further addition of HDPE content to 20 wt%. The molecular chains movements will be strengthened on account of the increase of (Δ εα), which provides charges with larger mean free volume to form high energy electrons. The increased traps density raises the possibilities of high energy electrons being captured, and enhance the breakdown performance of the specimen. It is deduced that the DC breakdown properties of HDPE/LDPE blends are influenced by molecular chains movements as well as traps characteristics.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123176282","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

Temperature Distribution in a 245 kV AC XLPE Cable 245千伏交流交联聚乙烯电缆的温度分布

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437481

S. Tagzirt, D. Bouguedad, A. Mekhaldi, I. Fofana

{"title":"Temperature Distribution in a 245 kV AC XLPE Cable","authors":"S. Tagzirt, D. Bouguedad, A. Mekhaldi, I. Fofana","doi":"10.1109/CEIDP49254.2020.9437481","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437481","url":null,"abstract":"The lifetime of power cable systems strongly depends on temperature. Above 90°C morphological and chemical changes occur in the structure of the dielectric materials, and may greatly reduce the cable service life. Therefore, an accurate determination of temperature distribution is important in evaluating the cable performances during operating conditions. In this work, temperature distribution in a 245 kV AC XLPE cable newly manufactured by an Algerian company (CABEL) is carried out. The influence of the ambient temperature and the effect of the load current variations on the temperature distribution of the cable are also investigated. Based on the conditions that have been assumed in the model, the newly manufactured cable can operate under 1342 A without risks of deterioration or damage. However, when the surrounding temperature exceeds 313 K (40°C), the permissible temperature limit on the conductor is exceeded with concomitant risk of overheating of the cable. In hot regions of the world (like southern Algeria) the current carrying capacity should be reduced to avoid premature deterioration of the cable. The simulation results reveal also that the higher the loading current is, the higher the cable temperature is and the largest temperature increase takes place in the cable core.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126464080","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

A Modified Polyetherimide Film Exhibiting Greatly Suppressed Conduction for High-temperature Dielectric Energy Storage 用于高温介质储能的改性聚醚酰亚胺薄膜

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437471

Chao Wu, Abdullah Alamri, Ajinkya A. Deshmukh, Zongze Li, Shahidul Islam, G. Sotzing, Yang Cao

{"title":"A Modified Polyetherimide Film Exhibiting Greatly Suppressed Conduction for High-temperature Dielectric Energy Storage","authors":"Chao Wu, Abdullah Alamri, Ajinkya A. Deshmukh, Zongze Li, Shahidul Islam, G. Sotzing, Yang Cao","doi":"10.1109/CEIDP49254.2020.9437471","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437471","url":null,"abstract":"Polymer dielectrics are key materials for capacitive energy storage in electrical and electronic systems owning to their ultra-high power density and high breakdown strength. However, the dramatically increased electrical conduction leads to poor energy storage performance under high electric fields, especially at elevated temperatures. Here we introduce structural defects into Polyetherimide (PEI) to modify the high-temperature dielectric properties. The polarization and conduction properties are investigated to reveal the effect of the structural defect. The modified PEI exhibits largely improved charge-discharge efficiency at elevated temperatures due to the suppressed electrical conduction, e.g., 91 % under ~400 MV/m at 200°C. The modification of PEI through a high-throughput facile process exhibited an enormous potential in capacitive energy storage under harsh conditions. The strategy demonstrated here unveils an unexplored space for modifying established polymers by introducing local structural defects.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123079458","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

Influence of VFTO Characteristics on Electric Field Distribution of Basin-Type Insulator Using Transient Method 瞬态法研究VFTO特性对盆式绝缘子电场分布的影响

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437497

Zehua Wu, Ao Gong, Sijia Zhu, Zongliang Xie, Zihao Guo, Zongren Peng

{"title":"Influence of VFTO Characteristics on Electric Field Distribution of Basin-Type Insulator Using Transient Method","authors":"Zehua Wu, Ao Gong, Sijia Zhu, Zongliang Xie, Zihao Guo, Zongren Peng","doi":"10.1109/CEIDP49254.2020.9437497","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437497","url":null,"abstract":"When operating the switch, Vety Fast Transient Over Voltage (VFTO) will occur due to the characteristics of the GIS bus. It seriously threatens the safety of the equipment in the transformer substation, especially the basin-type insulator. When designing the insulation structure of the basin-type insulator, the uniformity of the electric field distribution ought to be considered firstly. In general, the field distribution is always calculated by using peak voltage of the overvoltage as a boundary condition. However, due to the high frequency, amplitude and gradient of VFTO, whether the wave process is considered may influence the results. Therefore, the electric field distribution of GIS, which includes basin-type insulator and shielding ball, was calculated by COMSOL with the transient method proposed in this paper. Results showed that the distortion and enhancement of the electric field appeared comparing with that calculated by the traditional method. The influence rules of VFTO characteristics including wave front length and amplitude on the electric field calculation was investigated. It could conclude that the smaller value of wave front and the higher value of amplitude will make greater distortion and enhancement on electric field strength.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125916406","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