2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)最新文献_第5页

Reliability of HVDC and MVDC Electrical Asset: The Challenge of Insulation Design 高压直流和MVDC电气设备的可靠性:绝缘设计的挑战

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI: 10.1109/ICPADM49635.2021.9493971

G. Montanari, R. Ghosh, H. Naderiallaf, P. Seri

{"title":"Reliability of HVDC and MVDC Electrical Asset: The Challenge of Insulation Design","authors":"G. Montanari, R. Ghosh, H. Naderiallaf, P. Seri","doi":"10.1109/ICPADM49635.2021.9493971","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493971","url":null,"abstract":"Reliability of DC electrical asset components has not been investigated as broadly as for sinusoidal AC supply. On the other hand, DC assets are more and more common, and they are forecasted to grow in number, power, and voltage in the near future. This is not only in transmission grids, but also in distribution/generation (renewables), industrial application and electrification transportation. To complicate the framework, it has to be recognized that DC asset components are not only subjected to DC steady-state voltage, but also to voltage and temperature transients, as those coming from energization, voltage polarity inversion, ripple, repetitive voltage impulses and load variations. The major issue to asset component reliability can come, in these conditions, from electrical insulation. While designing insulation under AC sinusoidal voltage is a century-long practice, with many feedbacks from field installations, the same does not hold for modulated sinusoidal (i.e., power electronics) and DC supply. Electrical stresses can be different in magnitude and distribution from AC to DC, and load variations in DC can contribute to electric stress variations much more than in AC. All of this may impact significantly on aging rate and reliability of electrical insulation.This paper investigates the difference between electric field distribution, and consequent aging mechanisms and rate, from AC sinusoidal to DC supply, considering, in particular, the real DC operating conditions during which voltage and load transients can occur frequently. The contribution of partial discharges to aging rate will be also taken into account, bringing to the derivation of a probabilistic life model that can allow reliability estimations in the design of DC insulation systems to be achieved.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121692323","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

Partial Discharge and Breakdown Strength Characteristics of Cross-Linked Polyethylene/SiO2 Nanocomposites 交联聚乙烯/SiO2纳米复合材料的局部放电和击穿强度特性

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI: 10.1109/ICPADM49635.2021.9493913

N. Saman, M. H. Ahmad, Z. Buntat, Z. Nawawi, M. Sidik, M. Jambak

{"title":"Partial Discharge and Breakdown Strength Characteristics of Cross-Linked Polyethylene/SiO2 Nanocomposites","authors":"N. Saman, M. H. Ahmad, Z. Buntat, Z. Nawawi, M. Sidik, M. Jambak","doi":"10.1109/ICPADM49635.2021.9493913","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493913","url":null,"abstract":"The partial discharge and dielectric breakdown strength characteristics are among the parameters measured for insulation development, especially for the power cable. Cross-linked polyethylene (XLPE) is a type of host polymer used widely to insulate the conductor part of the medium and high voltage cables. The resilience of the cable commonly depends on the performance of the polymer to insulate the conduction part efficiently. However, the dielectric performances of the XLPE degraded due to various aging factors. Adding the nanofillers into the XLPE matrix might enhance the dielectrics properties of the XLPE. In this study, silica (SiO2) nanofillers have been added into the XLPE matrix with various loadings to improve the partial discharge and dielectric breakdown strength. The loadings of the silica nanofillers were varied at 1, 3, and 5 wt% to identify the most effective nanofillers loading in improving XLPE nanocomposites' durability. The results show that XLPE nanocomposites with 1 wt% silica nanofillers obtained the lowest value of the maximum PD magnitude compared to other compositions. The dielectric breakdown strength of XLPE increased significantly as 1 wt% of silica nanofillers have dispersed. However, the trend was saturated when the nanofiller loading at 3 wt% and slightly decreased at 5 wt% of the nanofiller loading.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121598330","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 new technology of GIS partial discharge location method based on DFB fiber laser 基于DFB光纤激光器的GIS局部放电定位新技术

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI: 10.1109/ICPADM49635.2021.9493937

Long Li, Hua Yin, Wenbin Zhao, Chenglong Jia

{"title":"A new technology of GIS partial discharge location method based on DFB fiber laser","authors":"Long Li, Hua Yin, Wenbin Zhao, Chenglong Jia","doi":"10.1109/ICPADM49635.2021.9493937","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493937","url":null,"abstract":"With the increase of voltage levels and the expansion of power grids, GIS equipment has been widely used in the power industry. Due to the small size of GIS and the tight distribution of internal devices, many traditional preventive test items cannot be carried out. The stable operation of GIS equipment is essential to the safety of the power grid. According to past experience, the deterioration of insulation performance is the biggest threat to the safe and stable operation of GIS. GIS partial discharge online monitoring methods can be roughly divided into two categories: electrical monitoring methods and non-electric monitoring methods. The accuracy of traditional electrical detection methods such as pulse current method is general. Although the ultra-high frequency method has strong anti-interference and partial discharge source positioning ability, as the distance from the partial discharge source increases, the signal attenuates greatly; Non-electric monitoring methods such as optical monitoring and chemical detection are only suitable for offline detection, and are not applicable to the running GIS; while the acoustic method is non-invasive, which can locate the partial discharge source and is not affected by the external noise of the GIS; When a partial discharge occurs inside the GIS, the generated acoustic signal will cause the GIS cavity wall to vibrate. The acoustic DFB fiber vibration sensor can be used to detect the cavity wall vibration to achieve the purpose of detecting the partial discharge inside the GIS. It is also possible to directly use the ultrasonic sensor to detect the ultrasonic signal generated by its discharge to determine whether a partial discharge has occurred in the GIS. In this paper, two methods, DFB fiber laser sensing technology and ultrasonic sensors, are used to detect partial discharges, and their reliability and sensitivity are analyzed.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134001532","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

Characterization of Thermal Degradation of Glass Fiber Reinforced Polymer Used in High Voltage Composite Insulator in Nitrogen Atmosphere by FTIR and Micro-Morphology Analyses 高压复合绝缘子用玻璃纤维增强聚合物在氮气气氛中热降解的FTIR和微观形貌分析

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI: 10.1109/ICPADM49635.2021.9493931

Shuyuan Wang, Yanfeng Gao, Yi Lu, Jifei Zhang, Xu Zhang, Shuochao Fan, Jingzhe Yu, Yuan Chen, Xinsheng Ma, Hui Wang, Bin Su, Min Liu

{"title":"Characterization of Thermal Degradation of Glass Fiber Reinforced Polymer Used in High Voltage Composite Insulator in Nitrogen Atmosphere by FTIR and Micro-Morphology Analyses","authors":"Shuyuan Wang, Yanfeng Gao, Yi Lu, Jifei Zhang, Xu Zhang, Shuochao Fan, Jingzhe Yu, Yuan Chen, Xinsheng Ma, Hui Wang, Bin Su, Min Liu","doi":"10.1109/ICPADM49635.2021.9493931","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493931","url":null,"abstract":"The thermal degradation behavior of glass fiber reinforced polymer (GFRP) in nitrogen atmosphere was studied in the present work by thermogravimetric analysis (TGA). The changes of GFRP during the thermal degradation process were characterized from both chemical composition and micro physical structure points of view by using Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). The steps of thermal degradation of GFRP in nitrogen were investigated in detail by analyzing the residues at different set temperatures, then the temperature ranges for the disappearance of methyl and aliphatic structure and the appearance of carbonyl and polyaromatic structure were determined with a temperature resolution of 20 °C. The changes of micro physical structure of GFRP during the thermal degradation in nitrogen involved the softening, melt, shrinkage, appearing of twisted and shrink lines, debonding of interface between glass fiber and epoxy resin matrix and releasing the pyrolyzed gas consecutively. Based on the results, the entire process of thermal degradation of GFRP from initial intact to final deterioration in nitrogen up to 800 °C was characterized, the present work is helpful for better understanding of the thermal degradation behavior of GFRP used in high voltage composite insulator as well as in other industry applications involving the temperature rising condition.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130124178","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 on Thermal Conductivity of BNNs/Mg(OH)2/LDPE Composites Based on Melt Blending Method 熔融共混法制备BNNs/Mg(OH)2/LDPE复合材料导热性能研究

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI: 10.1109/ICPADM49635.2021.9493996

Chu Wang, Jing-Hong Wang, Changshun Wu, Weigang Li, Zhaowen Yang, Kai Wu

{"title":"Study on Thermal Conductivity of BNNs/Mg(OH)2/LDPE Composites Based on Melt Blending Method","authors":"Chu Wang, Jing-Hong Wang, Changshun Wu, Weigang Li, Zhaowen Yang, Kai Wu","doi":"10.1109/ICPADM49635.2021.9493996","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493996","url":null,"abstract":"Enhancing the thermal conductivity of insulation materials can reduce the operating temperature and thus increase the transmission capacity of power cables. In this work, low density polyethylene (LDPE) with the fillers of magnesium hydroxide (Mg(OH)2) was selected as the base insulation materials for fire retardant. Boron nitride nanosheets (BNNs) were selected as the fillers to increase the thermal conductivity. To imitate the melt extrusion in cable manufacturing process, composites with different filler ratios were prepared by HAAKE Polylab OS and then molded at high pressure. The thermal conductivities of the composites were measured by LFA447 nanoflash and the microstructures of composites were observed by the scanning electron microscope (SEM). The filler orientation was characterized by diffraction of X-rays (XRD) to represent the anisotropic index of the composites. The results indicated that BNNs were inclined to be oriented along the extrusion plane because of the axial pressure in molding process. As a result, the composites showed anisotropic thermal conductivity. For example, in the composites with 20wt% BNNs, the thermal conductivity in through-plane direction reached 3.97W/(m·K), which was 1240% of that of LDPE. Furthermore, with the addition of Mg(OH)2, the thermal conductivity of the composite was further improved, and the thinner flake samples showed stronger anisotropy in thermal property. It was shown that the multi-packing structure molded by the simple melt-blending process was a feasible method to fabricate high efficiency thermally conductive composites.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130090167","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

Correlating UV Visible Spectral Response and Thermal Ageing of Blended Transformer Oil 混合变压器油紫外可见光谱响应与热老化的关系

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI: 10.1109/ICPADM49635.2021.9493988

Manas Chakraborty, Niharika Baruah, Sisir Kumar Nayak, Prabhat Kumar Maiti

{"title":"Correlating UV Visible Spectral Response and Thermal Ageing of Blended Transformer Oil","authors":"Manas Chakraborty, Niharika Baruah, Sisir Kumar Nayak, Prabhat Kumar Maiti","doi":"10.1109/ICPADM49635.2021.9493988","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493988","url":null,"abstract":"Ester based vegetable oils (VOs) are potential replacement of Mineral oil (MO) filled power transformers in near future. Retro filling of power transformers filled with MO by VO is real possibility which may result into a mixture of MO and VO or simply blended oils (BOs). The effect of ageing on electrical and physiochemical properties of BOs in operation will be different than that of individual MO and VO. Fresh MO and VO samples are blended in three different proportions, 3:1, 1:1 and 1:3 and are thermally aged in open beaker for 168 hours at 150°C. Important ageing parameters namely specific resistance (SR), dielectric dissipation factor (DDF), relative permittivity, total acid number (TAN) and interfacial tension (IFT) are monitored before and after thermal ageing. Extent of ageing in BOs is compared with individual MO and VO. The changes in these parameters are different than individual MO and VO. The ageing characteristics are varying with varying MO/VO proportions. The UV-visible spectroscopy is recorded before and after ageing and areas under the curve (AUC) of absorbance between 360-600 nm wavelength range are obtained. The correlation of AUC with electrical and physiochemical parameters are discussed.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"143 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132704185","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

Defects and Resistance Degradation of Sputtered Doped Lead Zirconate Titanate Thin Films 溅射掺杂锆钛酸铅薄膜的缺陷及电阻退化

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI: 10.1109/ICPADM49635.2021.9493888

K. Ho, D. Reis, K. Hiller

引用次数: 0

Study of High Voltage Connectors for Coaxial Cables Used in Kicker Applications at CERN 欧洲核子研究中心踢球用同轴电缆高压连接器的研究

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI: 10.1109/ICPADM49635.2021.9493993

D. Kontelis, L. Ducimetière, T. Kramer, L. Sermeus, T. Stadlbauer, P. Trubačová

{"title":"Study of High Voltage Connectors for Coaxial Cables Used in Kicker Applications at CERN","authors":"D. Kontelis, L. Ducimetière, T. Kramer, L. Sermeus, T. Stadlbauer, P. Trubačová","doi":"10.1109/ICPADM49635.2021.9493993","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493993","url":null,"abstract":"The CERN accelerator complex uses kicker magnets that are pulsed with voltages of up to 80 kV and pulse rise times as fast as 100 ns. For pulse transmission, special coaxial high voltage cables are used together with custom designed connectors with high dielectric strength, low partial discharges, and precise impedance. Several types of connectors are in use at CERN since decades. The aim is to develop a connector, which will be used for a polyethylene prototype cable at 60 kV, to possibly replace the existing SF6 gas filled cables. Improvements for better voltage holding and significantly reduced partial discharges have been investigated and are outlined. The connectors are simulated using Finite Element Method (FEM) analysis and are subsequently high voltage tested to identify weaknesses and finally introduce a new improved connector design. Existing connectors have been inspected, simulated, HV tested in the laboratory, and their weak points have been analyzed. The influence of triple points inside the connector and the ways to treat them were studied. The test procedure, including partial discharge measurements and inception voltage tests, is outlined. Based on the knowledge gained, a new design for future 60 kV connectors has been developed and is analyzed. Results of simulations and HV tests are presented and show the initial feasibility of the design.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121365504","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

Optimization Design on Shielding Electrodes for PLC Reactor in UHV Indoor DC yard 特高压室内直流场PLC电抗器屏蔽电极的优化设计

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI: 10.1109/ICPADM49635.2021.9493891

Yiyu Guo, Zichen Zhao, Wei Zhang, Guohua Yan, Yongjie Li, Zongren Peng

{"title":"Optimization Design on Shielding Electrodes for PLC Reactor in UHV Indoor DC yard","authors":"Yiyu Guo, Zichen Zhao, Wei Zhang, Guohua Yan, Yongjie Li, Zongren Peng","doi":"10.1109/ICPADM49635.2021.9493891","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493891","url":null,"abstract":"PLC (Power Line Carrier) reactor is a tower-type filter equipment in indoor DC yard consisting of segmental grading ring, supporting insulators, flange, winding coil and so on. Comparing with outside DC yard, indoor DC yard has stricter requirements to uniform electric field for shielding device, due to the compact layout of filter equipment and grounding potential of roof and wall. So, it is necessary to analyze the characteristic of potential and electric field distribution of grading ring of PLC reactor. In this paper, an original ±1100kV indoor DC yard model is built and analyzed with finite element method. The parametric modeling method is used to calculate the surface electric field distribution on the surface of PLC reactor with different structure parameters of grading ring. According to the calculation results, the structure parameters were adjusted and adopted spindle-type arrangement of grading ring. After the optimization, the maximum surface field strength of the grading ring meet the control value 1.2kV/mm. The calculation results could provide valuable references for the design of UHVDC PLC reactor.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130871505","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

Effect of Titanium oxide Nanofiller on the Electrical Properties of Polypropylene Nanocomposites for HVDC Insulation 氧化钛纳米填料对高压直流绝缘聚丙烯纳米复合材料电性能的影响

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI: 10.1109/ICPADM49635.2021.9493902

Muhammad Adnan, Z. Abdul-Malek, K. Y. Lau, Muhammad Tahir

引用次数: 0