Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341850
S. Zhou, Zhonglei Li, Fan Yu, Wei Yang, Z. Xing, M. Fan, Ying Zhang, B. Du
Polypropylene (PP) is considered to be a recyclable alternative to XLPE for cable insulation by virtue of its higher melting point and higher electrical resistivity. This work focuses on the effect of syndiotactic PP (sPP) content on the AC electrical tree growth characteristics in isotactic PP (iPP)/sPP blend insulation. The growth rate of electrical tree in PP blends decreased with the increase of sPP content from 0 to 15 wt%. When sPP content continues to increase, the crystallinity and deep trap density of the blend decline, resulting in the increasing initial probability and growth rate of electrical tree. The PP blend with 15 wt% sPP shows an excellent resistance to electrical tree, which is attributed to the higher crystallinity. The higher crystallinity results in a higher deep trap density in sPP/iPP blends. The increased deep trap density is conducive to reduce the mean free path of charges and confine impact ionization, resulting in the lower growth speed of electrical tree.
{"title":"Effect of sPP Content on Electrical Tree Growth Characteristics in iPP/sPP Blend Cable Insulation","authors":"S. Zhou, Zhonglei Li, Fan Yu, Wei Yang, Z. Xing, M. Fan, Ying Zhang, B. Du","doi":"10.1109/ICD46958.2020.9341850","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341850","url":null,"abstract":"Polypropylene (PP) is considered to be a recyclable alternative to XLPE for cable insulation by virtue of its higher melting point and higher electrical resistivity. This work focuses on the effect of syndiotactic PP (sPP) content on the AC electrical tree growth characteristics in isotactic PP (iPP)/sPP blend insulation. The growth rate of electrical tree in PP blends decreased with the increase of sPP content from 0 to 15 wt%. When sPP content continues to increase, the crystallinity and deep trap density of the blend decline, resulting in the increasing initial probability and growth rate of electrical tree. The PP blend with 15 wt% sPP shows an excellent resistance to electrical tree, which is attributed to the higher crystallinity. The higher crystallinity results in a higher deep trap density in sPP/iPP blends. The increased deep trap density is conducive to reduce the mean free path of charges and confine impact ionization, resulting in the lower growth speed of electrical tree.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"44 1","pages":"9-12"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73504941","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}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341857
Jordà Franquet, I. Fernández, A. Ortiz
The use of vegetable oil (natural ester) in electrical devices like power transformers is increasing due to their high biodegradability and better safety. The lifespan of power trans- formers is mainly defined by cellulose insulation condition, which usually works together with dielectric oil as electrical insulation and also as mechanical winding protector and compactor. That is why the aim and results of this research shows us not only the dielectric parameters evolution, but also the relationship between the mechanical factors and the moisture content of thermal accelerated ageing processes, with commercial vegetable oil, of Kraft paper and Diamond Dotted Paper (DDP). These are two of the most common insulating materials in electric power transformers. In addition, the new tests have been done by a different method of paper ageing analysis.
{"title":"Dielectric and Mechanical Assessment of Kraft and Diamond Dotted Paper Aged with Commercial Vegetable Oil","authors":"Jordà Franquet, I. Fernández, A. Ortiz","doi":"10.1109/ICD46958.2020.9341857","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341857","url":null,"abstract":"The use of vegetable oil (natural ester) in electrical devices like power transformers is increasing due to their high biodegradability and better safety. The lifespan of power trans- formers is mainly defined by cellulose insulation condition, which usually works together with dielectric oil as electrical insulation and also as mechanical winding protector and compactor. That is why the aim and results of this research shows us not only the dielectric parameters evolution, but also the relationship between the mechanical factors and the moisture content of thermal accelerated ageing processes, with commercial vegetable oil, of Kraft paper and Diamond Dotted Paper (DDP). These are two of the most common insulating materials in electric power transformers. In addition, the new tests have been done by a different method of paper ageing analysis.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"26 1","pages":"696-699"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73781127","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}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341852
T. Le, Z. Valdez-Nava, G. Bélijar, S. Diaham, L. Laudebat, L. Fetouhi, R. Khazaka
One of the main goals in aeronautic industry is to increase the total electrical power in on-board systems. The first approach is to increase the voltage while reducing the volume of converters. However, this approach induces very high electrical constraints on the insulating materials used for power module. These local high electric fields can cause premature failure, by partial discharge activity and insulation breakdown. In order to efficiently reduce the electrical stresses in high voltage power modules, the design of new stress-control encapsulating composite materials with graded properties has been developed using the particles electrophoresis auto assembling technique. It is a promising solution since it does not impact the volume of the power module and has a negligible impact on the overall mass. The aim of this paper is to evaluate different strategies to achieve such field grading encapsulating composite with local high relative permittivity ($varepsilon_{r} gt 10)$, tailored around critical areas where the electric field is high. The present paper mainly proposes two processes to enable the electrodeposition of a field grading layer within a composite encapsulation to cover multiple electrodes of a direct bonded copper (DBC) substrate with a complex layout. The first approach consists in adding a new and fixed electrode on the layout of DBC substrate that will not be polarized or used during normal operation of the module. The second method consists in adding a removable top electrode above the substrate. Results show that the latter approach is potentially the best choice to enable the electrodeposition of a homogenous thickness of field graded layer on a complex DBC layout with multiple adjacent copper tracks.
{"title":"Original design of field grading materials for high voltage power module applications","authors":"T. Le, Z. Valdez-Nava, G. Bélijar, S. Diaham, L. Laudebat, L. Fetouhi, R. Khazaka","doi":"10.1109/ICD46958.2020.9341852","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341852","url":null,"abstract":"One of the main goals in aeronautic industry is to increase the total electrical power in on-board systems. The first approach is to increase the voltage while reducing the volume of converters. However, this approach induces very high electrical constraints on the insulating materials used for power module. These local high electric fields can cause premature failure, by partial discharge activity and insulation breakdown. In order to efficiently reduce the electrical stresses in high voltage power modules, the design of new stress-control encapsulating composite materials with graded properties has been developed using the particles electrophoresis auto assembling technique. It is a promising solution since it does not impact the volume of the power module and has a negligible impact on the overall mass. The aim of this paper is to evaluate different strategies to achieve such field grading encapsulating composite with local high relative permittivity ($varepsilon_{r} gt 10)$, tailored around critical areas where the electric field is high. The present paper mainly proposes two processes to enable the electrodeposition of a field grading layer within a composite encapsulation to cover multiple electrodes of a direct bonded copper (DBC) substrate with a complex layout. The first approach consists in adding a new and fixed electrode on the layout of DBC substrate that will not be polarized or used during normal operation of the module. The second method consists in adding a removable top electrode above the substrate. Results show that the latter approach is potentially the best choice to enable the electrodeposition of a homogenous thickness of field graded layer on a complex DBC layout with multiple adjacent copper tracks.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"134 1","pages":"313-316"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73074191","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}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341892
Z. Ran, B. Du, Jin Li, H. Yao, J. Xing, J. Dong
Flashover failure of the epoxy insulator in DC gaseous insulated pipeline (GIL) is a major problem limiting the development of the power transmission system. The electric field distortion is the main reason for flashover faults. Effective electric field regulation and flashover enhancement methods are in urgent need. In this paper, the surface conductivity graded material ($sigma$ -SFGM) was applied in cone-type insulator by surface fluorination technology, which was conducted in a sealed reactor connected with the gas pipelines and the temperature test probe. A fluorinated layer with a different thickness was formed at different portions of the insulator surface. The flashover tests were conducted under DC condition. The SFGM presents an ability of electric field regulation. Besides, the flashover voltage of the insulator with SFGM is higher than that of the original one by over 33 % whether there is a preload or not, indicating highly increased property by the design of SFGM. Compared with the traditional field control methods, the insulator proposed in this paper possesses a wide application prospect and provide a reference for the DC GIL.
{"title":"Flashover Improvement and Field Control of Insulator with Surface σ-FGM for DC GIL","authors":"Z. Ran, B. Du, Jin Li, H. Yao, J. Xing, J. Dong","doi":"10.1109/ICD46958.2020.9341892","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341892","url":null,"abstract":"Flashover failure of the epoxy insulator in DC gaseous insulated pipeline (GIL) is a major problem limiting the development of the power transmission system. The electric field distortion is the main reason for flashover faults. Effective electric field regulation and flashover enhancement methods are in urgent need. In this paper, the surface conductivity graded material ($sigma$ -SFGM) was applied in cone-type insulator by surface fluorination technology, which was conducted in a sealed reactor connected with the gas pipelines and the temperature test probe. A fluorinated layer with a different thickness was formed at different portions of the insulator surface. The flashover tests were conducted under DC condition. The SFGM presents an ability of electric field regulation. Besides, the flashover voltage of the insulator with SFGM is higher than that of the original one by over 33 % whether there is a preload or not, indicating highly increased property by the design of SFGM. Compared with the traditional field control methods, the insulator proposed in this paper possesses a wide application prospect and provide a reference for the DC GIL.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"32 1","pages":"309-312"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73949276","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}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341986
E. Ouatah, S. Megherfi, Y. Zebboudj
The current-votlage characteristics of negative corona discharge with the point-to-plane electrode system were studied. The aim is to introduce temperature and inter-electrodes spacing into the empirical formula “I = A(V — V0)2” that governs these characteristics. It was experimentally demonstrated that the coefficient A of the relation is proportional to temperature and the power of the inter-electrodes spacing independently, and the corona inception voltage V0 is proportional to the power of the inetr-electrodes spacing and is temperature-independent. From these results, a more generalized empirical formula was determined to estimate the discharge current with an accuracy of 10%.
{"title":"A New Empirical Formula of Negative Corona Discharge Current in Point-Plane Electrode System","authors":"E. Ouatah, S. Megherfi, Y. Zebboudj","doi":"10.1109/ICD46958.2020.9341986","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341986","url":null,"abstract":"The current-votlage characteristics of negative corona discharge with the point-to-plane electrode system were studied. The aim is to introduce temperature and inter-electrodes spacing into the empirical formula “I = A(V — V0)2” that governs these characteristics. It was experimentally demonstrated that the coefficient A of the relation is proportional to temperature and the power of the inter-electrodes spacing independently, and the corona inception voltage V0 is proportional to the power of the inetr-electrodes spacing and is temperature-independent. From these results, a more generalized empirical formula was determined to estimate the discharge current with an accuracy of 10%.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"88 1","pages":"525-528"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75895908","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}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341974
A. Andersen, Nataly Chen, Andrew Nuss, N. Low, Wousik Kim, R. Chave
Volume resistivity is a key material property needed for assessing the risk of electrostatic discharge (ESD) due to spacecraft charging. We have developed a volume resistivity test system capable of measuring volume resistivity ≥1019 Ω·cm in vacuum and at cryogenic temperatures. Key components of this new setup include a custom test fixture and very low noise battery voltage supply.
{"title":"High-Resistivity Measurement System for Spacecraft Dielectrics","authors":"A. Andersen, Nataly Chen, Andrew Nuss, N. Low, Wousik Kim, R. Chave","doi":"10.1109/ICD46958.2020.9341974","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341974","url":null,"abstract":"Volume resistivity is a key material property needed for assessing the risk of electrostatic discharge (ESD) due to spacecraft charging. We have developed a volume resistivity test system capable of measuring volume resistivity ≥1019 Ω·cm in vacuum and at cryogenic temperatures. Key components of this new setup include a custom test fixture and very low noise battery voltage supply.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"39 1","pages":"423-426"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77674728","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}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9342027
Nicolas Uguen, L. Trouillet-Fonti, R. A. Orabi, P. Sotta
Polymer composites with PVdF-HFP matrix and BaTiO3 nanoparticles were prepared with different dispersion states to evaluate the impact of the dispersion state of the nanoparticles on dielectric properties. We observe that the dispersion state has two effects: first, the overall dielectric permittivity is a little higher in aggregated systems than in well-dispersed systems; Second, conductivity, together with a capacitive contribution, increase at low frequencies in aggregated systems as compared to well-dispersed systems. We propose that polarization couplings may enhance the effective permittivity in aggregated systems, and that Maxwell-Wagner-Sillars polarization may also contribute at low frequencies due to local percolation of the particles.
{"title":"Effect of the Dispersion State on the Dielectric Properties in High Energy Density Polymer-Based Nanocomposites","authors":"Nicolas Uguen, L. Trouillet-Fonti, R. A. Orabi, P. Sotta","doi":"10.1109/ICD46958.2020.9342027","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9342027","url":null,"abstract":"Polymer composites with PVdF-HFP matrix and BaTiO3 nanoparticles were prepared with different dispersion states to evaluate the impact of the dispersion state of the nanoparticles on dielectric properties. We observe that the dispersion state has two effects: first, the overall dielectric permittivity is a little higher in aggregated systems than in well-dispersed systems; Second, conductivity, together with a capacitive contribution, increase at low frequencies in aggregated systems as compared to well-dispersed systems. We propose that polarization couplings may enhance the effective permittivity in aggregated systems, and that Maxwell-Wagner-Sillars polarization may also contribute at low frequencies due to local percolation of the particles.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"81 1","pages":"261-264"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80085028","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}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341895
S. V. Suraci, D. Fabiani, X. Colin, S. Roland
The aging of twisted pair cables with silane cross-linked polyethylene insulation has been examined by means of both chemical and electrical techniques. Radiochemical aging has been performed through three different dose rates in order to evaluate the contribution of the dose rate on the changing of the analyzed properties with aging. Correlation between the different techniques has been performed and the antioxidant contents has been successfully linked to the variation of the dielectric properties.
{"title":"Chemical and electrical characterization of XLPE cables exposed to radio-thermal aging","authors":"S. V. Suraci, D. Fabiani, X. Colin, S. Roland","doi":"10.1109/ICD46958.2020.9341895","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341895","url":null,"abstract":"The aging of twisted pair cables with silane cross-linked polyethylene insulation has been examined by means of both chemical and electrical techniques. Radiochemical aging has been performed through three different dose rates in order to evaluate the contribution of the dose rate on the changing of the analyzed properties with aging. Correlation between the different techniques has been performed and the antioxidant contents has been successfully linked to the variation of the dielectric properties.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"69 1","pages":"57-60"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79153304","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}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341954
S. Nakamura, Masahiro Sato, A. Kumada, K. Hidaka, S. Takano, Y. Hayase, K. Yamashiro, T. Takano
Silicone gel is widely used to encapsulate power electronic modules. The weakness of the electrical insulation is surface discharges initiated at the gel-substrate-electrode triple junction and the subsequent formation of cavities; so called electrical trees. The propagation characteristics of cavities under high frequency and fast rise time voltages, which are typical waveforms formed in power modules, have not been fully understood. Thus, polarity effect on cavity shape in silicone gel under repetitive voltage impulses were investigated. The results show that the branch number hardly increases in the earlier stage, but once the cavity length is saturated, the branch number increases rapidly. The branch number increases in order of the following conditions: under negative polarity, under bipolar impulses, under positive polarity. Under bipolar impulses the cavity length is shorter than the one under unipolar impulses. Branching mostly occurs from voids.
{"title":"Polarity Effect on Electrical Treeing in Silicone Gel under Repetitive Voltage Impulses","authors":"S. Nakamura, Masahiro Sato, A. Kumada, K. Hidaka, S. Takano, Y. Hayase, K. Yamashiro, T. Takano","doi":"10.1109/ICD46958.2020.9341954","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341954","url":null,"abstract":"Silicone gel is widely used to encapsulate power electronic modules. The weakness of the electrical insulation is surface discharges initiated at the gel-substrate-electrode triple junction and the subsequent formation of cavities; so called electrical trees. The propagation characteristics of cavities under high frequency and fast rise time voltages, which are typical waveforms formed in power modules, have not been fully understood. Thus, polarity effect on cavity shape in silicone gel under repetitive voltage impulses were investigated. The results show that the branch number hardly increases in the earlier stage, but once the cavity length is saturated, the branch number increases rapidly. The branch number increases in order of the following conditions: under negative polarity, under bipolar impulses, under positive polarity. Under bipolar impulses the cavity length is shorter than the one under unipolar impulses. Branching mostly occurs from voids.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"25 1","pages":"122-125"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84372479","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}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9342008
J. Ortego, E. Arcones, C. Vera, F. Álvarez, F. Garnacho, A. Khamlichi
During the last two decades, the measurement of partial discharges (PD) in rotating electrical machines that operate with high voltages is being the most effective method for detecting defects in their insulation. However, several inconveniences must be overcome by the technical analysts when on-line measurements are carried out. Among them, the most import is the high levels of background noise and interferences which, in many cases, affect significantly in the sensitivity of PD activity detection. In this article, three noise filtering techniques applied in PD measurements performed in a real installation are analyzed. In addition, the benefits of using advanced processing and diagnostic techniques for the evaluation of the dielectrics condition are evidenced. The practical experience presented was carried out in a HV installation comprising the alternator of a hydraulic plant, the plant substation and the insulated cable system that interconnects both parts. The results obtained highlight the importance of applying appropriate signal processing techniques when performing in-situ and on-line PD measurements in rotating machines.
{"title":"Processing techniques applied to partial discharge measuring in rotating machines","authors":"J. Ortego, E. Arcones, C. Vera, F. Álvarez, F. Garnacho, A. Khamlichi","doi":"10.1109/ICD46958.2020.9342008","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9342008","url":null,"abstract":"During the last two decades, the measurement of partial discharges (PD) in rotating electrical machines that operate with high voltages is being the most effective method for detecting defects in their insulation. However, several inconveniences must be overcome by the technical analysts when on-line measurements are carried out. Among them, the most import is the high levels of background noise and interferences which, in many cases, affect significantly in the sensitivity of PD activity detection. In this article, three noise filtering techniques applied in PD measurements performed in a real installation are analyzed. In addition, the benefits of using advanced processing and diagnostic techniques for the evaluation of the dielectrics condition are evidenced. The practical experience presented was carried out in a HV installation comprising the alternator of a hydraulic plant, the plant substation and the insulated cable system that interconnects both parts. The results obtained highlight the importance of applying appropriate signal processing techniques when performing in-situ and on-line PD measurements in rotating machines.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"3 1","pages":"898-901"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80898072","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}
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