2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)最新文献

An Analysis of the Characteristics of Oil-Paper Insulated Bushing with Moisture and X-wax Defects Through Oil Chromatographic and Frequency Domain Spectroscopy 用油色谱和频域光谱分析含水分和x蜡缺陷的油纸绝缘套管的特性

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI: 10.1109/ICEMPE51623.2021.9509131

Yubo Zhang, Zhiming Huang, R. Zhuo, M. Fu, Zhangting Yu, Lei Zhang, Yan Luo, Yue Yu

{"title":"An Analysis of the Characteristics of Oil-Paper Insulated Bushing with Moisture and X-wax Defects Through Oil Chromatographic and Frequency Domain Spectroscopy","authors":"Yubo Zhang, Zhiming Huang, R. Zhuo, M. Fu, Zhangting Yu, Lei Zhang, Yan Luo, Yue Yu","doi":"10.1109/ICEMPE51623.2021.9509131","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509131","url":null,"abstract":"This paper presents an investigation on the characteristics of damping and X-wax defects of oil-paper insulated bushing, with a combination of oil chromatograph and Frequency Domain Spectroscopy (FDS) and disintegration analysis. Firstly, based on the disintegration analysis and oil chromatography analysis of five 500 kV bushings with different service periods, the difference of dissolved gas component content in the bushing oil were obtained and were related to damping and X-wax defects. The results show that in the bushing suffering X-wax defect the oil contains a large amount of hydrogen (over $10000 mumathrm{L}/mathrm{L}$) and methane, and that shall be acted as a significant characteristic of the X-wax defect. Nevertheless, the content of carbon dioxide (CO2), acetylene (C2H2), ethylene (C2H4) and moisture in the oil of the bushing suffering damping defect is clearly higher than that in the defective bushings with X-wax. Secondly, the frequency domain dielectric spectrum (FDS) analysis of 5 bushings in service and 1 new bushing was conducted. It shows that the FDS is sensitive to moisture and x-wax defects of the bushings. In addition, the moisture mainly affects the dielectric loss of low frequency band (1mHz∼10mHz) of FDS curves. The X-wax defect has little effect on the low frequency band (1mHz∼10mHz) of FDS curves, but mainly affects the dielectric loss of 0.1Hz∼10Hz frequency band of FDS curves.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"73 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80398827","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

Assessment of the Insulation Conditions of Power Transformers Through Online Monitoring of Partial Discharges 基于局部放电在线监测的电力变压器绝缘状况评估

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI: 10.1109/ICEMPE51623.2021.9509243

G. Ferraz, Laerty J. S. Damião, R. Capelini, R. Salustiano

引用次数: 0

Partial Discharge Measurement of Power Module Packaging Insulation Under Square Wave with Short Transition Time Based on SHF-Down-Mixing Method 基于shf下混频法的短过渡时间方波下功率模块封装绝缘局部放电测量

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI: 10.1109/ICEMPE51623.2021.9509188

Yi Ding, Yalin Wang, Mingyu Zhou, Haoran Sun, Wenyi Li, Y. Yin

{"title":"Partial Discharge Measurement of Power Module Packaging Insulation Under Square Wave with Short Transition Time Based on SHF-Down-Mixing Method","authors":"Yi Ding, Yalin Wang, Mingyu Zhou, Haoran Sun, Wenyi Li, Y. Yin","doi":"10.1109/ICEMPE51623.2021.9509188","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509188","url":null,"abstract":"Exploring the partial discharge (PD) characteristics of power modules under square wave high electric fields with short rise and fall time is of great significance for improving the reliability of its packaging insulation. In this paper, a PD detection method based on super high frequency (SHF, 3-30 GHz) technique and signal down-mixing principle is applied to detect the PD under square wave. The power module packaging insulation specimen consisting of metal baseplate, direct bonding copper (DBC), substrate and housing is fabricated. A repetitive square wave generator is built to supply high voltage square waves with short transition time. PD experiments are performed under square wave and sinusoidal wave. Experimental results show that the SHF-down-mixing PD detection system can effectively suppress the electromagnetic interference (EMI) from the square wave and extract PD signals successfully. As the radius of the electrode corner increases, the partial discharge inception voltage (PDIV) values under the sinusoidal wave also gradually increases. The PDIV under square wave does not show a monotonically increasing and is usually higher than that under sinusoidal wave probably because of the effect of space charge accumulation.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"4 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85600434","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: 5

Research on Partial Discharge Source Positioning in Switchgear Based on PSO 基于粒子群算法的开关柜局部放电源定位研究

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI: 10.1109/ICEMPE51623.2021.9509089

Xiaokang Wang, Bo Niu, B. Hu, Haichuan Jin, Zhiyong Wu, Dongfang Wang

引用次数: 2

Seismic performance and isolation design for 220kV surge arrester 220kV避雷器抗震性能及隔震设计

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI: 10.1109/ICEMPE51623.2021.9509124

Hao Li, Long Shen, Yaolong Wang, Xin Wang, Zhenyu Yang, Q. Xie

引用次数: 0

Visual Platforms for Ultrasonic Detection of the Stress in GIS/GIL Insulators GIS/GIL绝缘子应力超声检测可视化平台

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI: 10.1109/ICEMPE51623.2021.9509155

Weiguo Li, Jinwei Chu, Wanying Liu, F. Zhou, Chao Gao, Ruodong Huang, Yi-Ning Zhang

{"title":"Visual Platforms for Ultrasonic Detection of the Stress in GIS/GIL Insulators","authors":"Weiguo Li, Jinwei Chu, Wanying Liu, F. Zhou, Chao Gao, Ruodong Huang, Yi-Ning Zhang","doi":"10.1109/ICEMPE51623.2021.9509155","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509155","url":null,"abstract":"Stress concentration may be an important cause for mechanical strength deterioration of GIS/GIL insulators. Ultrasonic detection technology of stress has the advantages of good directivity, nondestructive and high efficiency. In this paper, three kinds of LabVIEW visual detection platforms are designed. One is the platform of ultrasonic longitudinal wave penetration, which is used to detect the stress of epoxy in three-post insulators. One is the platform of ultrasonic longitudinal wave reflection, which is used to detect the stress of epoxy outside grounding insert of three-post insulators. The last one is the platform of ultrasonic critical refraction longitudinal wave, which is used to detect the surface stress of basin insulators. Taking a 550 kV GIL three-post insulator and a 252 kV GIS basin insulator as the research objects, the ultrasonic detection for stress of insulators is carried out. It is found that the stress of epoxy in a post of the three-post insulator is −0.008 MPa. The stress of epoxy outside grounding insert of the three-post insulator is −0.007 MPa. The surface stress of the basin insulator is 0.423 MPa when no external load is applied. The platforms can be used to detect the stress of insulators conveniently and quickly, which provides the foundation for subsequent engineering applications of the stress detection on GIS/GIL insulators.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"32 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76923553","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

A new method of nuclear magnetic resonance for aging State detection of composite insulators 核磁共振检测复合绝缘子老化状态的新方法

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI: 10.1109/ICEMPE51623.2021.9509181

Zhangting Yu, Dajian Li, Liangyuan Chen

引用次数: 0

Electrical Tree Characteristics in Graphene/SiR Nanocomposites under Temperature Gradient 温度梯度下石墨烯/SiR纳米复合材料的电树特性

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI: 10.1109/ICEMPE51623.2021.9509235

Yimeng Li, B. Du, Jin Li, Zhonglei Li, T. Han, Z. Ran

{"title":"Electrical Tree Characteristics in Graphene/SiR Nanocomposites under Temperature Gradient","authors":"Yimeng Li, B. Du, Jin Li, Zhonglei Li, T. Han, Z. Ran","doi":"10.1109/ICEMPE51623.2021.9509235","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509235","url":null,"abstract":"In this paper, graphene/silicone rubber (SiR) nanocomposites with filler contents of 0.001 ∼ 0.005 wt % are prepared to improve electrical tree inhibiting ability under different temperature gradients. The electrical treeing test is performed under three temperature gradients, by controlling the temperature of high voltage and ground sides. Experimental results indicate that the SiR sample with 0.003 wt% graphene presents the best performance on electrical tree resistance. The tree length and accumulated damage are both reduced with the increase of graphene content from 0 to 0.003 wt %, but increased with the further increase of filler content from 0.003 to 0.005 wt %. The tree outline tends to be circular in neat SiR under negative temperature gradient, while is triangular under positive temperature gradient. However, the effect of temperature gradient is weakened when graphene exists. The doping of graphene leads to deeper trap sites at the interfaces between nanoplatelets and polymer matrix, which enhances electrical resistances of SiR. This research provides an effective method to suppress electrical trees of SiR for cable accessories.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"126 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85703531","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

Analysis on Bird Damage Accident of Overhead Transmission Lines in Ningxia Region and Optimization Design of Insulating Grading Ring 宁夏地区架空输电线路鸟损事故分析及绝缘级配环优化设计

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI: 10.1109/ICEMPE51623.2021.9509213

Zihan He, H. Wu, X. Hu

{"title":"Analysis on Bird Damage Accident of Overhead Transmission Lines in Ningxia Region and Optimization Design of Insulating Grading Ring","authors":"Zihan He, H. Wu, X. Hu","doi":"10.1109/ICEMPE51623.2021.9509213","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509213","url":null,"abstract":"Bird damage is one of the main reasons for transmission line tripping or even outage. In order to analyze the characteristics and causes of bird damage faults, the bird damage faults of 110 kV and above transmission lines in Ningxia Power Grid from 2015 to 2020 are statistically analyzed. The results show that most of the bird faults in Ningxia power grid occur in plain and farmland, and most of them occur from July to October. The main cause of the fault is bird manure flashover, and all of them are short air gap flashover. In view of this phenomenon, the electric field distribution of composite insulator with grading ring is studied. The results show that the installation of grading ring greatly reduces the electric field along the insulator surface. At the same time, the pipe diameter and diameter of grading ring are selected as $R=mathrm{30}$ mm and $D=mathrm{260}$ mm, respectively. The application of insulation grading ring reduces the electric field along the surface of composite insulator, and different insulation layers and their thicknesses should be determined according to different voltage levels.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"59 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81455370","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

Measurement of Residual Stress in GIS Basin Insulators by Using Ultrasonic Longitudinal Critically Refracted Wave Method 超声纵向临界折射波法测量GIS盆地绝缘子残余应力

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE) Pub Date : 2021-04-11 DOI: 10.1109/ICEMPE51623.2021.9509141

Xu Yang, Changhong Zhang, Weiguo Li, Chao Gao, F. Zhou, Ruodong Huang, Guoli Wang, Xuezhi Liang

{"title":"Measurement of Residual Stress in GIS Basin Insulators by Using Ultrasonic Longitudinal Critically Refracted Wave Method","authors":"Xu Yang, Changhong Zhang, Weiguo Li, Chao Gao, F. Zhou, Ruodong Huang, Guoli Wang, Xuezhi Liang","doi":"10.1109/ICEMPE51623.2021.9509141","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509141","url":null,"abstract":"The residual stress could be produced during the curing process of GIS basin insulators. The coupling of residual stress and external stress may cause stress concentration, which threaten the safe operation of the insulators. In this paper, the method for detecting residual stress of a 252kV GIS basin insulator by critical refraction longitudinal wave (LCR) is presented. The residual stress detection system is built. The main frequency of excitation and receiving probe is 2 MHz. The ultrasonic velocity of epoxy resin standard sample is measured. Two checkpoints on the basin insulator are selected for the circumferential residual stress detection with a distance of 5 mm. The results show that ultrasonic velocity of the standard sample is 2927 m/s. The ultrasonic propagation time of the two checkpoints is different. Near the central conductor, the ultrasonic velocity is 3399 m/s and the compressive residual stress is 0.38 MPa. The ultrasonic velocity is 3073 m/s and the compressive residual stress is 0.12 MPa far away from the central conductor.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"35 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78669876","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