Cross-linked polyethylene (XLPE) nanocomposites show the potential to be insulating materials for high-voltage direct current (HVDC) cables because of their improved electrical properties. However, the role of nanoparticles on the thermal aging properties of cable insulation is still unclear. In this paper, the influence of thermo-oxidative aging on the space charge characteristics and physicochemical properties of pure XLPE and XLPE/Al2O3 nanocomposites were comparatively investigated. Space charge accumulation characteristics, crystallinity and carbonyl index were tested by pulse electroacoustic method (PEA) system, X-ray diffraction (XRD) and Fourier-transform infrared (FTIR), respectively. It was found that appropriate number of nanoparticles can improve the crystallinity of XLPE, reduce the low-molecular impurities containing carbonyl groups generated and also has an excellent effect on limiting the injection of homo-charges during the aging process. Compared with pure XLPE, XLPE/Al2O3-A with appropriate number of nanoparticles still has excellent space charge distribution and physicochemical properties when aged for 672 hours. The dispersive interface region between nanoparticles and matrix may be the reason for the anti-thermal aging ability exhibited by the nanocomposites.
{"title":"Effect of Thermo-oxidative Aging on Space Charge Characteristics and Physicochemical Properties of XLPE/Al2O3 Nanocomposites for HVDC Cables","authors":"Dao-Sheng Chen, Youxiang Yan, Zijun Xu, Yiwei Long, Wangbin Luo, Jianying Li","doi":"10.1109/CEIDP50766.2021.9705477","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705477","url":null,"abstract":"Cross-linked polyethylene (XLPE) nanocomposites show the potential to be insulating materials for high-voltage direct current (HVDC) cables because of their improved electrical properties. However, the role of nanoparticles on the thermal aging properties of cable insulation is still unclear. In this paper, the influence of thermo-oxidative aging on the space charge characteristics and physicochemical properties of pure XLPE and XLPE/Al2O3 nanocomposites were comparatively investigated. Space charge accumulation characteristics, crystallinity and carbonyl index were tested by pulse electroacoustic method (PEA) system, X-ray diffraction (XRD) and Fourier-transform infrared (FTIR), respectively. It was found that appropriate number of nanoparticles can improve the crystallinity of XLPE, reduce the low-molecular impurities containing carbonyl groups generated and also has an excellent effect on limiting the injection of homo-charges during the aging process. Compared with pure XLPE, XLPE/Al2O3-A with appropriate number of nanoparticles still has excellent space charge distribution and physicochemical properties when aged for 672 hours. The dispersive interface region between nanoparticles and matrix may be the reason for the anti-thermal aging ability exhibited by the nanocomposites.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"8 1","pages":"395-398"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75500092","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 : 2021-12-12DOI: 10.1109/CEIDP50766.2021.9705390
Z. Mao, Y. Zhang, K. Suzuki, C. Chen, S. Ong, Y. Suzuki
In the present study, a rapid screening method of amorphous fluorinated polymer based on graph network is investigated for development of a novel electret material with high charging performance. Solid-state ionization potential (IP) of amorphous polymer is chosen as the index of charge stability, and determined by the density functional theory (DFT) in conjunction with polarizable continuum model (PCM). Surface charge density of CYTOP (Cyclic Transparent Optical Polymer) polymer with different end groups are measured both for positive and negative charging. The order of solid-state IP estimated with the present PCM/DFT is in quantitative accordance with the order of experimental data, indicating the present simulation gives appropriate quantitative estimation on the charge trapping performance of CYTOP electrets. In order to significantly reduce the heavy computational cost required by PCM/DFT and to develop a rapid screening method toward optimization of the end group for better charging performance, MatErial Graph Network (MEGNet) model is also employed for predicting the solid-state IP based on molecular structures.
{"title":"Rapid Screening of Amorphous Fluorinated Polymer Electret Based on Machine Learning","authors":"Z. Mao, Y. Zhang, K. Suzuki, C. Chen, S. Ong, Y. Suzuki","doi":"10.1109/CEIDP50766.2021.9705390","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705390","url":null,"abstract":"In the present study, a rapid screening method of amorphous fluorinated polymer based on graph network is investigated for development of a novel electret material with high charging performance. Solid-state ionization potential (IP) of amorphous polymer is chosen as the index of charge stability, and determined by the density functional theory (DFT) in conjunction with polarizable continuum model (PCM). Surface charge density of CYTOP (Cyclic Transparent Optical Polymer) polymer with different end groups are measured both for positive and negative charging. The order of solid-state IP estimated with the present PCM/DFT is in quantitative accordance with the order of experimental data, indicating the present simulation gives appropriate quantitative estimation on the charge trapping performance of CYTOP electrets. In order to significantly reduce the heavy computational cost required by PCM/DFT and to develop a rapid screening method toward optimization of the end group for better charging performance, MatErial Graph Network (MEGNet) model is also employed for predicting the solid-state IP based on molecular structures.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"31 1","pages":"667-670"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78087913","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 : 2021-12-12DOI: 10.1109/CEIDP50766.2021.9705416
Zhihui Wang, Yong Liu, Hao-xiong Wang, T. Han, Y. Gao, B. Du
Galloping fault is one of the common fault types of overhead transmission lines, which has a huge impact on the safe and reliable operation of the entire power grid. In this paper, a three-dimensional model of 10kV overhead insulated conductor is built, and the electric field at the connection between the conductor and the post insulator of the overhead insulated conductor is analyzed by the finite element analysis method. The results show that there is an electric field at the connection of the overhead insulated conductor and the post insulator which is different from the other parts of the conductor. At the same time, the electric field intensity will change with the swing of the conductor. The changing electric field will keep the insulating material in the process of non-stop polarization, which will ultimately affect the insulation performance of the conductor.
{"title":"Insulation Characteristics of Overhead Insulated Line Affected by Line Galloping","authors":"Zhihui Wang, Yong Liu, Hao-xiong Wang, T. Han, Y. Gao, B. Du","doi":"10.1109/CEIDP50766.2021.9705416","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705416","url":null,"abstract":"Galloping fault is one of the common fault types of overhead transmission lines, which has a huge impact on the safe and reliable operation of the entire power grid. In this paper, a three-dimensional model of 10kV overhead insulated conductor is built, and the electric field at the connection between the conductor and the post insulator of the overhead insulated conductor is analyzed by the finite element analysis method. The results show that there is an electric field at the connection of the overhead insulated conductor and the post insulator which is different from the other parts of the conductor. At the same time, the electric field intensity will change with the swing of the conductor. The changing electric field will keep the insulating material in the process of non-stop polarization, which will ultimately affect the insulation performance of the conductor.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"33 1","pages":"563-566"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81158395","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 : 2021-12-12DOI: 10.1109/CEIDP50766.2021.9705411
P. Romano, G. Rizzo, A. Imburgia, G. Ala, R. Candela, S. F. Bononi, M. Albertini
The occurrence of Partial Discharges (PD) in HVAC cables is widespread considered as one of the most important concerns for the stability of the insulation. To date, the role of PD in the ageing and definitive fault of HVDC cables has been poorly investigated. This is mainly due to some practical difficulties in the performing of the measurements. Compared to the PDs occurring under AC stress, the higher inception voltages and the lower repetition rates, obtainable under DC voltage, make the exclusion of the measurement noise more difficult. This paper is focused on the study of the characteristics of the PDs occurring in an artificial defect located in proximity of the outer dielectric’ surface of an HVDC model cable. The main purpose of this research is to evaluate the PD characteristics during load transients in the proposed experimental setup. The investigation on the PD activity in an artificially defected HVDC model cable has been experimentally performed on a segment of cable 6 m long jointed and heated up by means of a current transformer. The PD activity has been measured by means of an antenna sensor during all the duration of the experiment. After a period during which no PD are detected, a PD repetition rate increasing over time has been found, attributable to the rising of the electric field intensity in proximity of the outer dielectric surface.
{"title":"Partial discharges characteristics during load transients in an HVDC model cable","authors":"P. Romano, G. Rizzo, A. Imburgia, G. Ala, R. Candela, S. F. Bononi, M. Albertini","doi":"10.1109/CEIDP50766.2021.9705411","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705411","url":null,"abstract":"The occurrence of Partial Discharges (PD) in HVAC cables is widespread considered as one of the most important concerns for the stability of the insulation. To date, the role of PD in the ageing and definitive fault of HVDC cables has been poorly investigated. This is mainly due to some practical difficulties in the performing of the measurements. Compared to the PDs occurring under AC stress, the higher inception voltages and the lower repetition rates, obtainable under DC voltage, make the exclusion of the measurement noise more difficult. This paper is focused on the study of the characteristics of the PDs occurring in an artificial defect located in proximity of the outer dielectric’ surface of an HVDC model cable. The main purpose of this research is to evaluate the PD characteristics during load transients in the proposed experimental setup. The investigation on the PD activity in an artificially defected HVDC model cable has been experimentally performed on a segment of cable 6 m long jointed and heated up by means of a current transformer. The PD activity has been measured by means of an antenna sensor during all the duration of the experiment. After a period during which no PD are detected, a PD repetition rate increasing over time has been found, attributable to the rising of the electric field intensity in proximity of the outer dielectric surface.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"75 1","pages":"631-634"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73531022","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 : 2021-12-12DOI: 10.1109/CEIDP50766.2021.9705457
Wei Fang, Li Cheng, Hanqing Wang, Lijun Yang, R. Liao
The high surface per unit volume of nanoparticles leads to strong attractive interaction between particles producing high agglomeration tendency [1]-[2]. The agglomeration of nano particles in the polymer will reduce the overall modification effect of the material. When the degree of agglomeration is severe, it may even cause serious deterioration of the mechanical and electrical properties of materials [3]. Electron microscope imaging is the main method to detect the dispersion of nano fillers in solid dielectrics, but this method is easily limited by the detection range, so the evaluation of the overall dispersion of materials still needs to be further explored. In this paper, according to the mechanical constitutive relationship in nanocomposite dielectrics, we first theoretically analyzed the feasibility of nonlinear acoustic detection method. Then the samples with different dispersion degree were prepared by adjusting the dispersion factors, and the feasibility of the detection method was verified by scanning electron microscope (SEM), broadband dielectric spectroscopy (BDS) and nonlinear ultrasonic test results. Finally, we use this method to detect functionally graded materials (FGM), and realize the nonlinear acoustic imaging of FGM, which provides a new way for the dispersion detection of nano materials like nanocomposite dielectric and FGM.
{"title":"High Power Ultrasonic Testing Method for Agglomeration of Nanoparticles in Nanocomposite Dielectrics","authors":"Wei Fang, Li Cheng, Hanqing Wang, Lijun Yang, R. Liao","doi":"10.1109/CEIDP50766.2021.9705457","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705457","url":null,"abstract":"The high surface per unit volume of nanoparticles leads to strong attractive interaction between particles producing high agglomeration tendency [1]-[2]. The agglomeration of nano particles in the polymer will reduce the overall modification effect of the material. When the degree of agglomeration is severe, it may even cause serious deterioration of the mechanical and electrical properties of materials [3]. Electron microscope imaging is the main method to detect the dispersion of nano fillers in solid dielectrics, but this method is easily limited by the detection range, so the evaluation of the overall dispersion of materials still needs to be further explored. In this paper, according to the mechanical constitutive relationship in nanocomposite dielectrics, we first theoretically analyzed the feasibility of nonlinear acoustic detection method. Then the samples with different dispersion degree were prepared by adjusting the dispersion factors, and the feasibility of the detection method was verified by scanning electron microscope (SEM), broadband dielectric spectroscopy (BDS) and nonlinear ultrasonic test results. Finally, we use this method to detect functionally graded materials (FGM), and realize the nonlinear acoustic imaging of FGM, which provides a new way for the dispersion detection of nano materials like nanocomposite dielectric and FGM.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"69 1","pages":"347-351"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86416968","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 : 2021-12-12DOI: 10.1109/CEIDP50766.2021.9705378
P. Ashitha, S. Akhil
The study provides results of analysis performed on laboratory prepared binary composites of nano Alumina and micro Aluminum Tri Hydrate dispersed in silicone rubber elastomer. Extent of dispersion is analyzed through SEM micrographs. Thermogravimetric analysis shows a small improvement in thermal properties. Stress strain curves is analyzed for the effects of nano Alumina in altering tensile strength and percentage elongation at break. Dielectric strength in oil, and dry arc resistance test is also performed on the composites. Agglomeration of nano Alumina and subsequent development of thermal links between agglomerated sub-micron structures of nano Alumina and micro Aluminum Tri Hydrate is briefly discussed. A preliminary analysis of the afore mentioned properties is performed and reported in this study.
{"title":"Development of Nano Alumina/Micro ATH Filled Silicone Elastomers for High Voltage Insulation Applications","authors":"P. Ashitha, S. Akhil","doi":"10.1109/CEIDP50766.2021.9705378","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705378","url":null,"abstract":"The study provides results of analysis performed on laboratory prepared binary composites of nano Alumina and micro Aluminum Tri Hydrate dispersed in silicone rubber elastomer. Extent of dispersion is analyzed through SEM micrographs. Thermogravimetric analysis shows a small improvement in thermal properties. Stress strain curves is analyzed for the effects of nano Alumina in altering tensile strength and percentage elongation at break. Dielectric strength in oil, and dry arc resistance test is also performed on the composites. Agglomeration of nano Alumina and subsequent development of thermal links between agglomerated sub-micron structures of nano Alumina and micro Aluminum Tri Hydrate is briefly discussed. A preliminary analysis of the afore mentioned properties is performed and reported in this study.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"9 1","pages":"247-250"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87411152","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 : 2021-12-12DOI: 10.1109/CEIDP50766.2021.9705381
T. Luo, W. Zhao, M. Niasar
With widely use of power electronics in medium voltage level, there is increasing concern about behaviour of insulation material under arbitrary voltage stress. Solid-gas insulation is a general choice in medium voltage level. Therefore, it’s unavoidable to encounter surface discharge problem. In this paper, the surface discharge on epoxy-air interface is investigated, which is a commonly used insulation material. Point to plate electrode was used to test the surface flashover voltage and partial discharge (PD) behaviour at 50Hz, 500Hz, 1kHz, 2kHz and 5kHz. As the result, with increasing frequency, PDIV keeps roughly constant and flashover voltage first increases and then decrease, and the frequency obtaining highest flashover voltage is related to gap length.
{"title":"Experimental study of epoxy surface discharge under different frequencies","authors":"T. Luo, W. Zhao, M. Niasar","doi":"10.1109/CEIDP50766.2021.9705381","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705381","url":null,"abstract":"With widely use of power electronics in medium voltage level, there is increasing concern about behaviour of insulation material under arbitrary voltage stress. Solid-gas insulation is a general choice in medium voltage level. Therefore, it’s unavoidable to encounter surface discharge problem. In this paper, the surface discharge on epoxy-air interface is investigated, which is a commonly used insulation material. Point to plate electrode was used to test the surface flashover voltage and partial discharge (PD) behaviour at 50Hz, 500Hz, 1kHz, 2kHz and 5kHz. As the result, with increasing frequency, PDIV keeps roughly constant and flashover voltage first increases and then decrease, and the frequency obtaining highest flashover voltage is related to gap length.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"15 1","pages":"574-577"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87970711","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 : 2021-12-12DOI: 10.1109/CEIDP50766.2021.9705409
Shuangzan Ren, Jingfeng Wu, Hao Wu, Dongxin Hao, Yang Wu, Lu Gao, Z. Lv, Kai Wu
Oil immersed paper is the main insulating materials used in converter transformers. The aging process of oil immersed paper is accompanied by the complete cycle of the application of oil paper insulation system, and aging will cause irreversible deterioration of the insulation performance of oil immersed paper. In this paper, epoxy is used as a barrier material to construct a triple-layer sample (i.e. epoxy/oil immersed paper/epoxy) and the PEA method is used to measure the space charge distribution in the triple-layer sample at different aging status. By comparing the charge accumulation on the interface of the triple-layer sample at different aging status, we can find that as the aging status deepens, the amount and the accumulation speed of ionized charges will increase. This shows that aging makes the oil immersed paper produce more easily ionized substances, which will cause more serious electric field distortion.
{"title":"Effect of the Aging Status on Ionization of Oil Immersed Paper","authors":"Shuangzan Ren, Jingfeng Wu, Hao Wu, Dongxin Hao, Yang Wu, Lu Gao, Z. Lv, Kai Wu","doi":"10.1109/CEIDP50766.2021.9705409","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705409","url":null,"abstract":"Oil immersed paper is the main insulating materials used in converter transformers. The aging process of oil immersed paper is accompanied by the complete cycle of the application of oil paper insulation system, and aging will cause irreversible deterioration of the insulation performance of oil immersed paper. In this paper, epoxy is used as a barrier material to construct a triple-layer sample (i.e. epoxy/oil immersed paper/epoxy) and the PEA method is used to measure the space charge distribution in the triple-layer sample at different aging status. By comparing the charge accumulation on the interface of the triple-layer sample at different aging status, we can find that as the aging status deepens, the amount and the accumulation speed of ionized charges will increase. This shows that aging makes the oil immersed paper produce more easily ionized substances, which will cause more serious electric field distortion.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"34 1","pages":"466-469"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91324054","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 : 2021-12-12DOI: 10.1109/CEIDP50766.2021.9705384
Zichen Liu, Yongsheng Xu, F. Yin, Bin Cao, H. Mei, Fuzeng Zhang, Yi Jiang, Liming Wang
This paper reproduces failure of thyristor voltage monitoring (TVM) board by artificial experiments and the effects of contamination and environmental conditions on TVM function are studied. The results show that the increase in relative humidity can lead to the deviation of check-back signal while the effect of temperature change is insignificant. The increase in both equivalent salt deposit density (ESDD) and non-soluble deposit density (NSDD) can reduce the humidity threshold of TVM. According to the test results, measures such as decreasing the environmental relative humidity before the converter valve is back in operation, or cleaning device regularly are proposed to avoid TVM failure.
{"title":"Experimental Study on the Effect of Surface Contamination on the Function of Thyristor Voltage Monitoring Board","authors":"Zichen Liu, Yongsheng Xu, F. Yin, Bin Cao, H. Mei, Fuzeng Zhang, Yi Jiang, Liming Wang","doi":"10.1109/CEIDP50766.2021.9705384","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705384","url":null,"abstract":"This paper reproduces failure of thyristor voltage monitoring (TVM) board by artificial experiments and the effects of contamination and environmental conditions on TVM function are studied. The results show that the increase in relative humidity can lead to the deviation of check-back signal while the effect of temperature change is insignificant. The increase in both equivalent salt deposit density (ESDD) and non-soluble deposit density (NSDD) can reduce the humidity threshold of TVM. According to the test results, measures such as decreasing the environmental relative humidity before the converter valve is back in operation, or cleaning device regularly are proposed to avoid TVM failure.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"10 1","pages":"239-242"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90501700","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 : 2021-12-12DOI: 10.1109/CEIDP50766.2021.9705350
O. Šefl, R. Prochazka, R. Haller, G. Monkman
This article compares the standard electrical method of partial discharge detection with a novel optical detection method based on silicon photomultipliers. A third, complementary, single-loop antenna method is added to represent the ultra-high frequency method commonly used in gas-insulated switchgear/lines. A trio of air-insulated electrode designs that simulate the fundamental fault/discharge types in gaseous insulation (protrusion – corona discharge, floating conductive particle, surface discharges) are employed. Phase-resolved partial discharge activity patterns are compiled for each electrode design. The patterns are analyzed using spatial statistics and the interpretation of the obtained data trends explained by means of an example. Ultimately, the consistency and reliability of discharge detection by the optical methods for each fault/discharge type are evaluated, and suggestions for improvement are made.
{"title":"Alternative Approach to Optical Detection of Partial Discharges in Air","authors":"O. Šefl, R. Prochazka, R. Haller, G. Monkman","doi":"10.1109/CEIDP50766.2021.9705350","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705350","url":null,"abstract":"This article compares the standard electrical method of partial discharge detection with a novel optical detection method based on silicon photomultipliers. A third, complementary, single-loop antenna method is added to represent the ultra-high frequency method commonly used in gas-insulated switchgear/lines. A trio of air-insulated electrode designs that simulate the fundamental fault/discharge types in gaseous insulation (protrusion – corona discharge, floating conductive particle, surface discharges) are employed. Phase-resolved partial discharge activity patterns are compiled for each electrode design. The patterns are analyzed using spatial statistics and the interpretation of the obtained data trends explained by means of an example. Ultimately, the consistency and reliability of discharge detection by the optical methods for each fault/discharge type are evaluated, and suggestions for improvement are made.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"2 1","pages":"324-327"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90571031","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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