2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)最新文献

Electroluminescence of Epoxy Resin Nanocomposite under AC High Field II 环氧树脂纳米复合材料在交流强电场下的电致发光研究II

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437444

S. Masuda, K. Tohyama, T. Iizuka, K. Tatsumi, S. Yoshida, T. Umemoto, T. Mabuchi, H. Muto

引用次数: 0

Simulation Research on the Application of Nonlinear Conductivity Material in 110kV Cable Terminal with Electro-thermal Coupling Model 非线性导电材料在110kV电缆终端中应用的电热耦合模型仿真研究

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437539

Jiale Wu, Xupeng Song, Yan-Yan Gong, X. Bian

{"title":"Simulation Research on the Application of Nonlinear Conductivity Material in 110kV Cable Terminal with Electro-thermal Coupling Model","authors":"Jiale Wu, Xupeng Song, Yan-Yan Gong, X. Bian","doi":"10.1109/CEIDP49254.2020.9437539","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437539","url":null,"abstract":"Prefabricated rubber stress cone is the key part of the high-voltage cable terminal. Material with nonlinear conductivity can smartly smooth the non-uniform electrical field of the stress cone. Reasonable selection of the nonlinear coefficient is critical for determining the applicability of the nonlinear materials. The effects of nonlinear composite with different nonlinear coefficient on field grading effect, power loss and temperature distribution are simulated by establishing finite element numerical model of the 110kV AC cable terminal. The results indicate that with the increase of nonlinear coefficient, the electric field strength of the stress cone surface gradually decreases while that of the three-phase junction gradually increases. Although the power loss of the stress cone insulation increases, the resulting temperature rise is minimal. Considering field grading effect, the power loss and temperature rise, for 110kV AC cable terminal, nonlinear material with threshold electric field of 0.8MV/m and nonlinear coefficient of 7.5-11.5 is more suitable for operation environment.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"35 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":"121239704","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

Limitations of Attempting Calibration of Partial Discharge Measurements in VHF and UHF Ranges 尝试校准VHF和UHF范围局部放电测量的局限性

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437476

G. Behrmann, D. Gross, S. Neuhold

引用次数: 1

Polymer Nanocomposite Capacitors with Largely Reduced Conduction Loss Utilizing Wide-Bandgap Inorganic Nanofillers 利用宽禁带无机纳米填料大幅降低导通损耗的聚合物纳米复合电容器

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437383

He Li, Ding Ai, Yao Zhou, Lulu Ren, Qing Wang

引用次数: 0

Sequential versus Simultaneous Aging of EPDM Nuclear Cable Insulation Subjected to Elevated Temperature and Gamma Radiation 高温和伽马辐射下EPDM核电缆绝缘的顺序老化与同步老化

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437502

Mychal P. Spencer, Andy Zwoster, Tucker T. Bisel, M. Murphy, L. Fifield

{"title":"Sequential versus Simultaneous Aging of EPDM Nuclear Cable Insulation Subjected to Elevated Temperature and Gamma Radiation","authors":"Mychal P. Spencer, Andy Zwoster, Tucker T. Bisel, M. Murphy, L. Fifield","doi":"10.1109/CEIDP49254.2020.9437502","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437502","url":null,"abstract":"Electrical cables are integral to power, control, and instrumentation systems within nuclear power plants (NPPs). Exposure of cable systems within nuclear containment to elevated temperatures and gamma radiation during decades-long operation of NPPs can lead to degradation of the cables' polymeric insulation. Prediction of nuclear cable insulation degradation is complicated because thermal and radiation stress are not additive. In this work, we explore the relative effects of simultaneous and sequential thermal and gamma irradiation on the aging of ethylene-propylene-diene (EPDM) elastomer insulation to better understand realistic scenarios of cable insulation degradation. Cable insulation samples of EPDM were subjected to up to 320 kGy of gamma radiation at a dose rate of 300 Gy/hr in two heating scenarios: (1) simultaneously aged samples were heated at 150°C during irradiation and (2) sequentially aged samples were heated at 150°C for designated durations followed by corresponding periods of irradiation at ambient temperature. The mass, tensile elongation at break, and the carbonyl index were assessed to quantify the aging of the polymers. The simultaneous aging scenario was found to be the more severe of the two for EPDM insulation degradation.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"5 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":"122560307","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

Computational Study of the Arc Splitting in Power Interruption: The Effect of the Metallic Vapor on Arc Dynamics 电源中断时电弧分裂的计算研究:金属蒸气对电弧动力学的影响

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437455

Jindong Huo, Yang Cao

{"title":"Computational Study of the Arc Splitting in Power Interruption: The Effect of the Metallic Vapor on Arc Dynamics","authors":"Jindong Huo, Yang Cao","doi":"10.1109/CEIDP49254.2020.9437455","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437455","url":null,"abstract":"Plasma-solid interaction represents one of the major concerns in many industrial applications, such as power-interruption and plasma-metal processing. Characterized by high-current density and voltage drop, the arc roots dissipate intensive heat that vaporizes the solid counterparts. The generated vapor participates in the ionization and thereby alters the plasma properties, like the electrical conductivity and radiation absorption coefficient. Currently, most of research use the NEC method to estimate the radiative heat transfer. In this study, we consider a banded radiative heat transfer via the Discrete Ordinate method to accurately compute the plasma temperature. It is found that the radiation has great influence on the thermal state of plasma. Apart from the absorption coefficient, the metal vapor also increase the permeability of plasma bulk that will enhance the local magnetic field. For a systematic study, we integrate metal vaporization, species transport and radiative heat transfer into the plasma modelling based on a magnetohydrodynamics method. The simulation results reveal that metal vapor not only helps to alleviate the overall temperature field but also expedite the arc interruption. An accurate computation of metal vapor enhanced radiative heat transfer will enhance the understanding of arc behaviors and improves the design of practically oriented low-voltage circuit breakers.","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":"123024012","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

Development of Nonlinear Field Grading Material for Controlling Electric Field in DC Connectors 直流连接器控制电场非线性场级材料的研制

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437506

Mohamadreza Arab Baferani, Chuanyang Li, Tohid Shahsavarian, Ivan Jovanović, Yang Cao

{"title":"Development of Nonlinear Field Grading Material for Controlling Electric Field in DC Connectors","authors":"Mohamadreza Arab Baferani, Chuanyang Li, Tohid Shahsavarian, Ivan Jovanović, Yang Cao","doi":"10.1109/CEIDP49254.2020.9437506","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437506","url":null,"abstract":"In HVDC cable system, DC connectors e.g. joints and terminations are critical and vulnerable components. This is because of the non-uniform electric field distribution in DC connectors which can enhance the electric field at triple points and lead to degradation and failure in the long time. As a result, for a reliable HVDC cable system, accurate design of the DC connectors plays a vital role. To improve the uniformity of field distribution under all operating conditions especially at the interface of connector and cable insulation, nonlinear field grading material (NLFGM) stems as a viable solution. This study focuses on the development and test of SiR/SiC as NFLGM material for electric field grading in DC cable connectors. To investigate the performance of developed material, an electro-thermal model for 80kV DC cable joint under different thermal gradient conditions was used. The electric field distribution in the joint and across the interface of cable insulation and SiR as the joint insulation with and without NLFGM were simulated. The results show significant change in distribution of electric potential and decrease in amplitude of electric field in presence of NLFGM.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"6 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":"114265590","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

Impact of the Impurities on the Conductivity of Low-Density Polyethylene 杂质对低密度聚乙烯电导率的影响

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437482

H. Hamedi, R. Walker, J. Long, R. Rajagopalan, E. Furman, M. Lanagan, W. Woodward

引用次数: 1

Load Capacity Evaluation of Power Transformer via Temperature Rise Characteristics 基于温升特性的电力变压器负荷能力评估

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437520

Chen Wang, Yaoyu Xu, Chao Zhu, Yuan Li, Lei Zhang, Date Li, Guanjun Zhang

{"title":"Load Capacity Evaluation of Power Transformer via Temperature Rise Characteristics","authors":"Chen Wang, Yaoyu Xu, Chao Zhu, Yuan Li, Lei Zhang, Date Li, Guanjun Zhang","doi":"10.1109/CEIDP49254.2020.9437520","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437520","url":null,"abstract":"Power transformers are key components in the power grid, so it is of great importance to protect them from an unplanned outage. With the increase of social electricity consumption, the overload accidents of transformer have become increasingly frequent. In order to avoid the overload accidents, we investigate the loading capacity of transformer based on temperature rise characteristics. Firstly, considering the influence of sunshine radiation, we establish the improved thermal model. Because the DC resistance of winding and oil viscosity change with oil temperature, the algorithms of load loss and thermal resistance are modified to improve the calculation accuracy of hot-spot temperature (HST). Compared with conventional IEC standard method, the relative error of the improved model of hotspot temperature is reduced by about 2.5%. Further, the constraints of loading capacity for transformer are studied. Taken temperature rise characteristics with load current and the loading constraint factors of transformer into account, the evaluation model for loading capacity of transformer is proposed. The results show that the main constraint factor is the relative life loss of transformer under the normal periodic load; the main constraint factor is the capacity of auxiliary equipment of transformer under the long-term emergency load. The capacity of short-term emergency load is not only limited by the top-oil temperature and hot-spot temperature, but also affected by the initial load rate of transformer and the ambient temperature.","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":"128212134","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

Analysis of Chemical By-products from Partial Discharges in Air 空气中部分排放的化学副产物分析

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437483

Diana El Khoury, F. Gentils, O. Lesaint, N. Bonifaci

引用次数: 1