2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)最新文献_第9页

Modifying Electric Field of Tri-Post Insulator in a 320 kV DC GIL Based on Al2 O 3/SiC/epoxy Composite 基于al2o3 /SiC/环氧复合材料的320 kV直流GIL三柱绝缘子电场改性

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI: 10.1109/ICHVE53725.2022.10014474

Zuodong Liang, Fangwei Liang, Weijian Zhuang, Chuanjie Lin, Lingling Tang, Yulin Zeng, Bo Zhang, Chuanyang Li, Jinliang He

引用次数: 0

An Approach to Identify VLF/LF Cloud-to-ground Return Stroke Electric Field Waveform Based on Convolutional Neural Network 基于卷积神经网络的VLF/LF云对地回程电场波形识别方法

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI: 10.1109/ICHVE53725.2022.9961824

Xiao Lilang, C. Weijiang, Wang Yu, Fu Zhong, Cheng Yang, Chen Shen, Bian Kai, He Hengxin

{"title":"An Approach to Identify VLF/LF Cloud-to-ground Return Stroke Electric Field Waveform Based on Convolutional Neural Network","authors":"Xiao Lilang, C. Weijiang, Wang Yu, Fu Zhong, Cheng Yang, Chen Shen, Bian Kai, He Hengxin","doi":"10.1109/ICHVE53725.2022.9961824","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961824","url":null,"abstract":"The identification of lightning return stroke waveform plays an important role in the accurate location of lightning. Very low frequency/low frequency (VLF/LF) electromagnetic signals are widely used in lightning detection systems. The signals in this frequency band have a long propagation distance and are prone to attenuation distortion, which makes it more possible to misclassify the return stroke waveforms when using methods based on some specific waveform characteristic. The convolutional neural network is robust enough and performs well at discovering hidden patterns in images. In this paper, the residual convolutional neural network model is trained to obtain the waveform classifier. The lightning waveform data dataset is collected by lightning electric field measuring meters deployed in various provinces. After training, the classification accuracy of this classifier reaches 97.2% in the test set, and the accuracy reaches 86.75% using the traditional method based on waveform characteristics. The result proves the superior performance of the residual convolutional neural network model. By exploring the interpretability of the model, it is also proved that the better performance of the convolution network model comes from making full use of waveform information.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129783913","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 Electrical Properties of $text{TiO}_{2}$/EPDM Composites with Different Morphologies 不同形貌$text{TiO}_{2}$/EPDM复合材料电性能研究

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI: 10.1109/ICHVE53725.2022.10014513

Xu-Ben Wang, Tiandong Zhang, Changhai Zhang, Q. Chi

{"title":"Investigation of Electrical Properties of $text{TiO}_{2}$/EPDM Composites with Different Morphologies","authors":"Xu-Ben Wang, Tiandong Zhang, Changhai Zhang, Q. Chi","doi":"10.1109/ICHVE53725.2022.10014513","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.10014513","url":null,"abstract":"In this work, <tex>$text{TiO}_{2}$</tex> nanofibers <tex>$(text{TiO}_{2}$</tex> NFs) with micron-nano size are prepared via electrospinning, and composites with <tex>$text{TiO}_{2}$</tex> nanoparticles <tex>$(text{TiO}_{2}$</tex> NPs) and <tex>$text{TiO}_{2}$</tex> NFs as fillers are prepared using EPDM as the matrix. The effect of <tex>$text{TiO}_{2}$</tex> with different morphologies on the electrical properties of the EPDM matrix has been comparatively analyzed and systematically investigated. The results show that the <tex>$text{TiO}_{2}$</tex> NFs/EPDM exhibit nonlinear conductivity at a lower content compared to <tex>$text{TiO}_{2}$</tex> NPs/EPDM composites. The threshold electric field of 18 wt.% <tex>$text{TiO}_{2}$</tex> NFs/EPDM is 10.8 kV/mm and the nonlinear coefficient is 2.77. With the content of <tex>$text{TiO}_{2}$</tex> NPs and <tex>$text{TiO}_{2}$</tex> NFs increases, the breakdown field strength of the composites gradually decreases. At the same content, the breakdown strength of <tex>$text{TiO}_{2} text{NFs}/text{EPDM}$</tex> is slightly lower than <tex>$text{TiO}_{2}$</tex> NPs/EPDM; the dielectric constant and dielectric loss of <tex>$text{TiO}_{2}$</tex> NFs/EPDM composites are slightly higher than that of <tex>$text{TiO}_{2}$</tex> NPs/EPDM composites. The simulation results show that the 18 wt.% <tex>$text{TiO}_{2}$</tex> NFs/EPDM can better homogenize the electric field, reduce the electric field at the end of the shielding tube, and improve the reliability of the safe operation of cable accessories. This work provides an effective method of preparing electric field graded materials.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127057823","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

Influence of Humidity on the Dielectric Breakdown Properties of Nitrogen Switchgears 湿度对氮气开关设备介电击穿性能的影响

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI: 10.1109/ICHVE53725.2022.10014528

Haibo Su, Yuyang Yao, Yong Wang, Le Gu, Fangqing Zheng, Junxiang Liu, Lu Zhu

{"title":"Influence of Humidity on the Dielectric Breakdown Properties of Nitrogen Switchgears","authors":"Haibo Su, Yuyang Yao, Yong Wang, Le Gu, Fangqing Zheng, Junxiang Liu, Lu Zhu","doi":"10.1109/ICHVE53725.2022.10014528","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.10014528","url":null,"abstract":"Nitrogen is an environmentally friendly insulating medium gas most commonly used in medium-voltage (MV) gas switchgear. In this paper, the effect of humidity on the insulating property of nitrogen switchgears, namely, a small amount of water impurities mixed in N2 on dielectric breakdown characteristics of gas mixtures for a temperature range from 300 K to 4000 K at pressure of 0.1 MPa is analyzed. First of all, based on the Gibbs minimum free energy, the equilibrium composition of hot humid N2 with different water impurities fractions is calculated. Then, by solving the 2-term Boltzmann equation, the electron energy distribution functions is devoted to computing. The reduced ionization coefficient (α/N), the reduced attachment coefficient (IJ/N), and the reduced effective ionization coefficient (αeffIN) are then obtained based on the electron energy distribution functions. Eventually, the critical reduced electric field ($E$/$N$)cr is calculated. The result shows that the ($E$/$N$)cr of the humid N2 vary with the concentration of water impurities. Additionally, it is important fundamental data for the evaluation of the dielectric breakdown characteristics of N2 insulated switchgears with a small amount of water impurities.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"08 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127255713","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

Research on Distribution Characteristics of Stray Current in Metro Network 城域网杂散电流分布特性研究

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI: 10.1109/ICHVE53725.2022.9961518

Mingming Yin, Aimin Wang, Jun Wang, Xingyuan Li, B. Zhang

引用次数: 0

Analysis of Multiple Valve Units Steep Front Impulse Voltage Test of HVDC Thyristor Valve 高压直流晶闸管阀多阀单元陡前冲击电压试验分析

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI: 10.1109/ICHVE53725.2022.9961339

Chen Liu, Meng Shen, Ni Yuan, Shizhe Wang, Xingping Gou, Qi Zhao, Qiang Li, Guangwei Fan

引用次数: 0

Experimental Study on the Influence of Vibration Frequency on Gas Production Characteristics of Oil-paper Insulation 振动频率对油纸绝缘产气特性影响的实验研究

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI: 10.1109/ICHVE53725.2022.9961472

Xiaoyu Zhao, Yilin Wang, Huanchao Cheng, Jiayi Guo, Qing Xu, Jian Hao

{"title":"Experimental Study on the Influence of Vibration Frequency on Gas Production Characteristics of Oil-paper Insulation","authors":"Xiaoyu Zhao, Yilin Wang, Huanchao Cheng, Jiayi Guo, Qing Xu, Jian Hao","doi":"10.1109/ICHVE53725.2022.9961472","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961472","url":null,"abstract":"The oil-immersed reactor is one of the important equipment in the high-voltage and long-distance power transmission and transformation system. The ultra-high voltage (UHV) reactor in abnormal operation would produce gas, which is a concerning problem at the current project site. The system consisting of iron core, cellulose blocks and iron yokes in reactors may have mechanical resonance phenomena during operation. And vibration friction leads to metal losses, which would accelerate the decomposition of insulating oil and paper. In order to explore the influence of different combined contact structures on the dissolved gas content in the insulating oil under vibration mode, a gas production simulation platform in reciprocating vibration mode was designed. The results indicated that the vibration mode can promote the formation of CO and CO2, which may be due to the vibration promoting the oxidation reaction. In the equipment's long-term vibration, the contact combination structure will keep the CO gas content at a higher level. The combination of insulating paperboard-silicon steel and insulating paperboard-block contact will promote the generation of hydrocarbon gas in vibration mode, especially the combination of insulating paperboard-block contact will increase the CO2 and CH4 gas content significantly.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130138774","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

Establishment and Analysis of Soil Model for Multi-Circuit DC Common Grounding Electrode Group Site 多回路直流共接地电极群场地土壤模型的建立与分析

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI: 10.1109/ICHVE53725.2022.9961479

Weixing Li, Yi Zhang, Shangmao Hu, Gang Liu, Hanghang Zhao, Min Fan, Lichang Zhang, Wulue Zheng

引用次数: 0

Deteciton of Acetylene Gas based on high Performance $text{WO}_{3}$ Nanolamellae/Reduced Graphene Oxide (rGO) Nanosheets 基于高性能纳米片/还原氧化石墨烯(rGO)纳米片的乙炔气体检测

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI: 10.1109/ICHVE53725.2022.10014441

Zikai Jiang, Weigen Chen, Yujiang He, Hongtao Zhang, Zhixian Zhang, Junsheng Chen, K. Wu

{"title":"Deteciton of Acetylene Gas based on high Performance $text{WO}_{3}$ Nanolamellae/Reduced Graphene Oxide (rGO) Nanosheets","authors":"Zikai Jiang, Weigen Chen, Yujiang He, Hongtao Zhang, Zhixian Zhang, Junsheng Chen, K. Wu","doi":"10.1109/ICHVE53725.2022.10014441","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.10014441","url":null,"abstract":"Oil-immersed transformer faults diagnosis based on Metal oxides (MOs) materials is one of the most promising research trends in power system. In this paper, four contents of WO3 nanolamellae/ reduced graphene oxide nanocomposites were compounded via controlled hydrothermal method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to investigate the microstructure of prepared nanocomposites and indicated WO3 were widely distributed among rGO sheets. Spin -coating technique was utilized for nanocomposites coverage on gas sensor and the sensitivity of WO3 nanolamellae/ reduced graphene oxide nanocomposites towards multi-concentrations of C2H2 gases with temperature ranging from $50 ^{circ}mathrm{C}$ to $400 ^{circ}C$ was studied. The research results exhibited that 1 wt% sensing materials demonstrated a lower working temperature, outstanding response and recovery time, excellent long-time stability and remarkable recoverability. The potential mechanism of high performance WO3/rGO materials could be explained based on heterojunction electron exchange theory. Research outcomes presented in this paper can be the guidance to power transformer faults diagnosis to some degree.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130582748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of surface polishing on surface charging and flashover characteristics of spacer in GIS / GIL under AC condition 交流条件下，表面抛光对GIS / GIL中间隔片表面充电和闪络特性的影响

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI: 10.1109/ICHVE53725.2022.9961838

Y. H. Wang, J. Li, L. Zhang, Y.X. Wang, L. Hao, B. Du

{"title":"Effect of surface polishing on surface charging and flashover characteristics of spacer in GIS / GIL under AC condition","authors":"Y. H. Wang, J. Li, L. Zhang, Y.X. Wang, L. Hao, B. Du","doi":"10.1109/ICHVE53725.2022.9961838","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961838","url":null,"abstract":"Surface discharge is easy to occur in the polishing area of the basin spacer surface under AC working condition, which significantly reduces the insulation performance of the spacer. The influence of the polishing method on the surface charging and flashover voltage of spacers under AC voltage is investigated by experiments. The basin spacer was polished radially and circumferentially, the surface charging of spacer under the AC voltage was analyzed, and the flashover voltage under different AC conditions was measured. Results show that the accumulation of positive charges in the polished area of the radially polished spacer. The surface charge distribution changes from a single negative charge uniform distribution to uneven distribution. Besides, the flashover voltage is affected by polishing method. The flashover voltage of spacer before and after radial polishing decreases by 14% under AC pre-voltage. The flashover voltage of the basin spacer is improved by overall radial and circumferential surface polishing. It is confirmed that the Al2O3 particles exposed in the polished area are the important reason for the difference in surface charge distribution and flashover voltage of spacer before and after polishing.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130634469","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