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Assessment of Cable Aging for Nuclear Power Plants I&C Cable via Time-Frequency Domain Reflectometry 用时频域反射法评估核电站I&C电缆老化
2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341985
Gu-Young Kwon, Yeong Ho Lee, S. Bang, G. Ji, Geon Seok Lee, Z. A. Tamus, Y. Shin
{"title":"Assessment of Cable Aging for Nuclear Power Plants I&C Cable via Time-Frequency Domain Reflectometry","authors":"Gu-Young Kwon, Yeong Ho Lee, S. Bang, G. Ji, Geon Seok Lee, Z. A. Tamus, Y. Shin","doi":"10.1109/ICD46958.2020.9341985","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341985","url":null,"abstract":"Instrumentation and control (I&C) cable connected between numerous sensors and main control room contributes to the safe operation of nuclear power plants (NPPs). Some of I&C cables are installed in the place exposed to cable degradation causes such as mechanical damage, heat, and radiation. In this paper, two cable aging assessment parameters extracted from the results of time-frequency domain reflectometry (TFDR) is proposed to maintain the reliable and stable operation of the NPPs. To verify the proposed method, two different EPR insulated cables from distinct manufactures are adopted to accelerated thermal aging test. After aging, the assessment parameters of each cable are calculated, and the trend and linearity of the assessment parameters are observed. It is expected that the proposed method allows to ensure the safe operation of nuclear power plant.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"18 1","pages":"77-80"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77697346","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
Effects of Magnetic Field on Surface Flashover of Polyimide Film for Superconducting Magnet Insulation 磁场对超导磁体绝缘聚酰亚胺膜表面闪络的影响
2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341999
B. Du, Y. Li, M.Y. Wang, Z.X. Liu, X.T. Han, Y. Zhang, Jin Li, Z.L. Li, H.L. Sun
{"title":"Effects of Magnetic Field on Surface Flashover of Polyimide Film for Superconducting Magnet Insulation","authors":"B. Du, Y. Li, M.Y. Wang, Z.X. Liu, X.T. Han, Y. Zhang, Jin Li, Z.L. Li, H.L. Sun","doi":"10.1109/ICD46958.2020.9341999","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341999","url":null,"abstract":"Polyimide (PI) film is widely used as insulation material in superconducting magnet systems. While operating, the PI film is subjected to the interaction of electric and magnetic fields. The existence of magnetic field will affect charge behaviors leading to the changes in flashover voltage. In this paper, a steady magnetic field up to 1.2 T was applied to the PI films. The flashover voltages were investigated under DC condition and AC condition. Different angles between magnetic and electric fields were set to explore the influence of magnetic field direction on the flashover voltage of PI film. Experimental results show that the $Etimes B$ drifting into the surface will block the secondary electron emission, resulting in an increase in the flashover voltage. When the $Etimes B$ drifts out of the surface the result is just the opposite. The promoting effect of magnetic field on the changes of flashover voltage is weakened under the AC condition, while the suppressive effect is strengthened. The failure mechanism of PI film under strong magnetic field will provide a theoretical basis for improving the insulation reliability of superconducting magnets.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"88 1","pages":"97-100"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79887668","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
Benefit of Nonlinear Resistive Field Grading Materials on Medium Voltage Bushing by Finite Element Modeling (Flux 2D) vs Experimental Partial Discharge Measurements 采用有限元模型(Flux 2D)对中压套管进行非线性电阻场分级材料与实验局部放电测量的优势
2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341815
R. Metz, M. Hassanzadeh
{"title":"Benefit of Nonlinear Resistive Field Grading Materials on Medium Voltage Bushing by Finite Element Modeling (Flux 2D) vs Experimental Partial Discharge Measurements","authors":"R. Metz, M. Hassanzadeh","doi":"10.1109/ICD46958.2020.9341815","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341815","url":null,"abstract":"The effect of resistive field grading coatings on the electric field distribution in a medium voltage bushing has been studied. A typical coating is obtained by applying a commercial resistive field grading material and a conductive varnish that we both have previously electrically characterized. The electric field distribution over the bushing surface was computed and analyzed using a finite element method software (Flux 2D). The electric field enhancements at its critical points with and without field grading material were considered and confronted with experimental partial discharge detection. The complementary between the field grading material and the conductive varnish is highlighted: a special care of the true capability of the conductive layer to withdraw the electrical charges is stressed out.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"50 1","pages":"305-308"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79046984","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
From Laboratory to Industrial Scale: Comparison of Short- and Long-Term Dielectric Performance of Silica-Polypropylene Capacitor Films 从实验室到工业规模:硅-聚丙烯电容器薄膜的短期和长期介电性能比较
2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341890
K. Lahti, I. Rytöluoto, Minna Niittymäki, Eetta Saarimäki, M. Paajanen
{"title":"From Laboratory to Industrial Scale: Comparison of Short- and Long-Term Dielectric Performance of Silica-Polypropylene Capacitor Films","authors":"K. Lahti, I. Rytöluoto, Minna Niittymäki, Eetta Saarimäki, M. Paajanen","doi":"10.1109/ICD46958.2020.9341890","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341890","url":null,"abstract":"In this paper a route from laboratory scale samples to full industrial scale production of biaxially oriented silica-PP nanocomposite capacitor films is for the first time shown and verified. Morphological and dielectric characteristics of laboratory scale produced and by full industrial tenter -process produced nanocomposite and neat-PP reference films are presented and compared. In addition to the short-term characteristics also ageing performance of the industrial films are studied. The results show closely comparative dielectric behavior of the films and thus verifies the successful up-scaling of the used nanocomposite recipe. Although certain amount of impurities and voids were observed in both nanocomposite films the low probability dielectric breakdown strength characteristics were considered promising. Modified trap distribution, decreased conductivity and improved dielectric loss behavior has been verified for the nanocomposite film while areas of further development are also recognized.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"80 1","pages":"661-664"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82304986","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
Separation of superimposed PRPD Patterns by Signal Clustering 基于信号聚类的PRPD叠加模式分离
2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341858
B. Adam, S. Tenbohlen, M. Beltle
{"title":"Separation of superimposed PRPD Patterns by Signal Clustering","authors":"B. Adam, S. Tenbohlen, M. Beltle","doi":"10.1109/ICD46958.2020.9341858","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341858","url":null,"abstract":"Partial discharges are one of the main reasons of insulation failure in transformers. Multiple partial discharge sources in HV equipment can be active at the same time. Diagnosis is complicated by superimposed or overlapping patterns in the PRPD patterns. In order to classify the fault source correctly, the patterns must be separated first. In this paper we propose a method to separate partial discharge signals from different sources by their impulse waveform. A feature-set is constructed by selecting relevant features from a pool of 700 identified possible features. Then, different sources are separated by clustering techniques. Centroid-based clustering methods like the k-means algorithm are compared to density-based approaches like DBSCAN. After clustering multiple PRPD patterns can be calculated – one for each source. This method is developed on artificial partial discharge data, measured in the laboratory. Four different typical defect types are considered. Through multiple case studies we show, that the separation process works on different kinds of PD problems. This method works for all kinds of PD faults. It is shown, that PD sources not present in the training data used for development can also be separated reliably.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"96 1","pages":"858-861"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80359020","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
Investigation of the Breakdown Voltage of Insulation Oils at Medium Frequency after Thermal Ageing 绝缘油热老化中频击穿电压的研究
2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341873
J. Vocke, R. Möller, R. Puffer, B. Soppe
{"title":"Investigation of the Breakdown Voltage of Insulation Oils at Medium Frequency after Thermal Ageing","authors":"J. Vocke, R. Möller, R. Puffer, B. Soppe","doi":"10.1109/ICD46958.2020.9341873","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341873","url":null,"abstract":"Insulating oils and medium-frequency high voltages come together primarily where power electronic components are used, such as in power electronic transformers. For reliable long-term use, the insulation behaviour and, in particular, the breakdown voltage of the insulating oils at medium-frequency voltages is relevant, especially under consideration of ageing. Therefore, this paper investigates the influence of thermal ageing on the dielectric strength of insulating oil at medium frequency with an accelerated ageing test. Three insulating oils are each stored together with copper plates and insulating paper at 120 °C with controlled addition of air for an accelerated ageing. An oil sample is taken at fixed intervals and the breakdown voltage is determined for 2.2 kHz, 5.3 kHz and 8.6 kHz. In addition, the dielectric properties, acid number, water content and viscosity of each sample are determined. The investigations show a clear ageing dependency only for the acid number and the loss factor, all other parameters examined do not show such trend.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"18 1","pages":"716-719"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88767371","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
Influence of Demetallization Processes on Capacitor Grade Polymer Films Breakdown Strength 脱金属工艺对电容器级聚合物薄膜击穿强度的影响
2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341912
V. Belko, O. Emelyanov, I. Ivanov, N. Fedotov
{"title":"Influence of Demetallization Processes on Capacitor Grade Polymer Films Breakdown Strength","authors":"V. Belko, O. Emelyanov, I. Ivanov, N. Fedotov","doi":"10.1109/ICD46958.2020.9341912","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341912","url":null,"abstract":"The influence of metallized polypropylene demetallization processes, such as an electric explosion of metal layer and metal evaporation due to surface arc discharge, was investigated. 6 $mu$ m thick polymer film with aluminum and zinc metallization were tested. It was found that electric explosion and surface arc impact on polymer surface cause 20 and 30 percent reduction of breakdown strength for aluminum metallization, and 14 and 21 percent for zinc metallization, respectively. The results are useful for choosing the parameters of MFC voltage overstressing regimes.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"37 1","pages":"166-168"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89112411","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
Preparation and Electromechanical Performance Analysis of Self-healing Electrostrictive Polymer 自愈电致伸缩聚合物的制备及机电性能分析
2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341837
Z. Zhang, Youyuan Wang, Xiaosong Zhu, Yudong Li, Hongrui Gu
{"title":"Preparation and Electromechanical Performance Analysis of Self-healing Electrostrictive Polymer","authors":"Z. Zhang, Youyuan Wang, Xiaosong Zhu, Yudong Li, Hongrui Gu","doi":"10.1109/ICD46958.2020.9341837","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341837","url":null,"abstract":"The development of self-healing electrostrictive materials is helpful to improve the life of flexible electronic devices. In this paper, a polar elastomer-modified dielectric elastomer has achieved self-healing of shear damage at room temperature. The MG-SBS material was obtained by grafting methyl methyl thioglycolate (MG) onto styrene-butadiene- styrene (SBS) block copolymer by click chemical reaction. Tensile testing, mechanical dynamic thermal analysis, and broadband dielectric spectroscopy were used to analyze the performance of MG-SBS. Studies have shown that the CH/$pi$ bond enables MG-SBS materials to achieve self-healing of shear damage. MG-SBS is close to the electrostrictive properties of acrylic at lower temperature. The temperature stability of the electrostrictive performance is its unique advantage. The material will help improve the damage self-healing ability and temperature adaptability of flexible electronic devices.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"28 1","pages":"321-324"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90259225","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 Role of Filler Interface in Suppressing the Erosion of Silicone Rubber Under DC Voltage 填料界面在抑制直流电压下硅橡胶腐蚀中的作用
2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341937
Alhaytham Alqudsi, R. Ghunem, É. David, Y. Hadjadj
{"title":"The Role of Filler Interface in Suppressing the Erosion of Silicone Rubber Under DC Voltage","authors":"Alhaytham Alqudsi, R. Ghunem, É. David, Y. Hadjadj","doi":"10.1109/ICD46958.2020.9341937","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341937","url":null,"abstract":"The presented paper aims to highlight the role of fillerpolymer interface on the DC erosion resistance of silicone rubber (SiR) outdoor insulators. SiR composites filled with nano-sized boron nitride and fumed silica have been prepared in this study. Electrical and thermal experimental tools of the inclined plane tracking-erosion test, simultaneous thermogravimetric-differential thermal analyses, and thermal conductivity measurements are used to analyze the prepared nanocomposites. The analysis primarily investigates whether the composite’s enhancement of thermal conductivity or filler interface would be more influential on erosion suppression. Literature reports that the boron nitride filler improves SiR’s thermal conductivity, whereas fumed silica provides an exceptional interaction with SiR at the filler interface. SiR was filled with boron nitride at 5wt% (percent by weight) and 10wt%, while fumed silica was loaded with 5wt% and used as a reference composite in the study. The obtained results clearly indicate a superior erosion resistance of the silica filled SiR over the boron nitride filled one. An observation which seemingly could give more significant role of the filler-polymer interface on the erosion resistance of SiR used for high voltage DC outdoor insulators.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"10 1","pages":"154-157"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85299538","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
Life modeling analysis of Silane crosslinked polyethylene cables for nuclear applications 核用硅烷交联聚乙烯电缆寿命建模分析
2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341894
S. V. Suraci, D. Fabiani
{"title":"Life modeling analysis of Silane crosslinked polyethylene cables for nuclear applications","authors":"S. V. Suraci, D. Fabiani","doi":"10.1109/ICD46958.2020.9341894","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341894","url":null,"abstract":"In this article, the evaluation of the electrical and mechanical properties of short XLPE cables subjected to radio-chemical aging is reported. From these results, an initial multi-physics life modelling approach is presented. In particular, the proposed modelling of the electrical properties (here complex permittivity) showed to successfully assess of the health of the cables through non-destructive techniques putting the basis of a diagnostic method for cable management on site.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"15 1","pages":"61-64"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84129496","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
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