2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)最新文献_第10页

Compact electric field change meter and its application in lightning detection and fault analysis for power grids 紧凑型电场变化计及其在电网雷电检测和故障分析中的应用

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI: 10.1109/ICHVE49031.2020.9279853

Yu Wang, S. Gu, Yuhe Fang, Yuangen Xu, Yang Chen, Peng Li

引用次数: 2

DC Arc Numerical Calculations and Experimental Researches Based on the Arcing Horn Used in Over-head Line 基于架空线路电弧角的直流电弧数值计算与实验研究

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI: 10.1109/ICHVE49031.2020.9280011

Ruiyang Guan, Z. Jia

{"title":"DC Arc Numerical Calculations and Experimental Researches Based on the Arcing Horn Used in Over-head Line","authors":"Ruiyang Guan, Z. Jia","doi":"10.1109/ICHVE49031.2020.9280011","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9280011","url":null,"abstract":"Arcing horn, which is a kind of rod-rod air gap, is usually parallel-installed on the insulator in the over-headlines in order to protect the insulator from being burnt by the fault arc. However, if the fault arc cannot be interrupted by the arcing horn in time, it will cause the operation of DC transmission systems unstable. So, it is necessary to do some researches on the characteristics of arc motion. Here, a magneto hydro dynamic (MHD) model was built to simulate the arc moving behaviors, as well as the mathematical model for dynamic DC arc in the arcing horn was analyzed. Three kinds of airflows, such as the cross-wind, the non-wind and the wind in 45° direction, were simulated to demonstrate the effects of airflows on the arc moving behaviors. The arc temperature, voltage, current and resistance were presented according to the MHD simulation model. Finally, some experiments were made to compare with the simulation results. Experimental results verify that the MHD simulation model is correct. The arc temperature is as high as 9000 K and it is not significantly different during the various evolution processes. The direction of airflow has much influence on the arc moving behaviors under three different conditions. The arc voltage and resistance are gradually increased while the arc current is decreased after 250 ms. This paper is useful for the researches of DC arc movement in the arcing horns.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"11 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80637144","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

Method for Reducing Impulse Grounding Impedance of Grounding Device by Using Grounding Electrode with Non-uniform Radius 采用非均匀半径接地电极降低接地装置冲击接地阻抗的方法

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI: 10.1109/ICHVE49031.2020.9279521

Zhuoran Liu, Sen Wang, Bo Zhang, Yanchuan Cao, Donghui Luo, Wei Li

{"title":"Method for Reducing Impulse Grounding Impedance of Grounding Device by Using Grounding Electrode with Non-uniform Radius","authors":"Zhuoran Liu, Sen Wang, Bo Zhang, Yanchuan Cao, Donghui Luo, Wei Li","doi":"10.1109/ICHVE49031.2020.9279521","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279521","url":null,"abstract":"Reducing the transient grounding impedance of the grounding device is an important measure for lightning protection. However, due to the inductive reactance of the grounding electrode, the transient grounding impedance is usually very high. This paper analyzes the parameters that affect the inductive reactance of the grounding electrode, and studies the influence of the electrode radius on the inductive reactance. Considering the cost and the effective current leakage length of the grounding electrode, a method of reducing the transient grounding impedance is proposed. That is using a piece of grounding electrode with large radius near the current injection point of the grounding device, and then gradually reducing the radius along electrode. The effectiveness of the method is verified by numerical simulation, and the optimal arrangement is analyzed. It can be seen that the method can greatly increase the effective current leakage length of the grounding electrode and reduce the transient grounding impedance of the grounding device.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"62 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83146119","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

Study on AC Resistance of Overhead Conductors by Numerical Simulation 架空导线交流电阻的数值模拟研究

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI: 10.1109/ICHVE49031.2020.9279899

Dapeng Zhang, P. Dang

{"title":"Study on AC Resistance of Overhead Conductors by Numerical Simulation","authors":"Dapeng Zhang, P. Dang","doi":"10.1109/ICHVE49031.2020.9279899","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279899","url":null,"abstract":"Due to unbalanced energy distribution and economic development, high voltage, long distance power transmission have become one of the major development trends of modern power systems all over the world. The overhead conductors is an important transmission carrier in power system. Reduce line lose and increase transmission capacity of overhead conductors have become the research emphasis. The main affect factor of these overhead conductors performance is AC resistance. However, the AC resistance also affected by many complex factors like skin-effect, magnetic hysteresis and eddy current. The correctly calculated AC resistance of overhead conductors is the key to the energy-saving. In this paper, three kinds of the overhead conductors (Aluminum Conductors Steel Reinforced, Aluminum Conductors Aluminum-Clad Steel Reinforced and Aluminum Conductors Carbon fiber composite core) AC resistance model are built by numerical calculation. By using these model, the AC resistance is simulated calculate. Meanwhile, in order to verify the accuracy of simulation results, the AC resistance of overhead conductors are measured by test. The result show that the different between the simulated values and measured values are less. In addition, through the simulation and measurement results of AC resistance, the energy-saving performance of the three kinds of overhead conductors is also compared. When passing a large current, the AC resistance of Carbon fiber composite core wire is smaller than the other overhead conductors. The calculation can provide reference for the evaluation of AC loss in transmission lines.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"2 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77817370","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

Type Identification of GIS Partial Discharge Based on SF6 Decomposition Characteristics under Negative DC Voltage 直流负电压下基于SF6分解特性的GIS局部放电类型识别

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI: 10.1109/ICHVE49031.2020.9279820

Xu Yang, Yi Liu, Yi Jiang, Hao Wen, Jing Zhang, Jia Chen

{"title":"Type Identification of GIS Partial Discharge Based on SF6 Decomposition Characteristics under Negative DC Voltage","authors":"Xu Yang, Yi Liu, Yi Jiang, Hao Wen, Jing Zhang, Jia Chen","doi":"10.1109/ICHVE49031.2020.9279820","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279820","url":null,"abstract":"In order to use SF<inf>6</inf> decomposition characteristics to identify faults of DC gas-insulated switchgear (GIS) under partial discharge (PD), the author chooses 6 experimental voltages to represent different PD stages, and carries out SF<inf>6</inf> decomposition experiments. The experimental results show that SF<inf>6</inf> decomposition produces include five stable components of CF<inf>4</inf>, CO<inf>2</inf>, SO<inf>2</inf>F<inf>2</inf>, SOF<inf>2</inf> and SO<inf>2</inf>, among which SOF<inf>2</inf> is the most important decomposed product, and the concentration of sulfur-containing components is higher than that of carbon-containing components. Finally, a feature set consisting of 21 concentration ratios is constructed, and the maximum relevance minimum redundancy criterion is used for the feature selection. BP neural network and support vector machine are used for fault diagnosis, and the accuracy rate is higher than 88%. The research work lays the foundation for the on-line monitoring and insulation state evaluation of DC GIS based on SF<inf>6</inf> decomposition characteristics in the future.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75818942","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

Defect Detection for Composite Insulators Based on Electromagnetic Wave Spectrum and Field Application 基于电磁波波谱和场应用的复合绝缘子缺陷检测

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI: 10.1109/ICHVE49031.2020.9279900

M. Jin, Jian Wang, Yongjie Li, Cheng Chen, Shengwen Shu

引用次数: 1

Research on Time-domain Dielectric Response of Multiple Impulse Voltage Aging Oil-film Dielectric 多次冲击电压老化油膜介质的时域介电响应研究

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI: 10.1109/ICHVE49031.2020.9279656

Chenmeng Zhang, Kailin Zhao, S. Xie, Can Hu, Yu Zhang, Nanxi Jiang

引用次数: 0

Study on Temperature and Electric Field Distributions of DC Cable Accessories 直流电缆附件温度场分布的研究

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI: 10.1109/ICHVE49031.2020.9279365

Longxiao Chen, Zhien Zhu, Liming Yang, Xike Wu, Shujun Liu, Yu Liu

引用次数: 0

Surface Morphology Evolution of W-Ni-Fe Alloy Electrode Under Repetitive Pulsed Discharges 重复脉冲放电对W-Ni-Fe合金电极表面形貌的影响

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI: 10.1109/ICHVE49031.2020.9280025

Jiawei Wu, R. Han, Manyu Wang, W. Ding

{"title":"Surface Morphology Evolution of W-Ni-Fe Alloy Electrode Under Repetitive Pulsed Discharges","authors":"Jiawei Wu, R. Han, Manyu Wang, W. Ding","doi":"10.1109/ICHVE49031.2020.9280025","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9280025","url":null,"abstract":"The conduction of the gas switch is accompanied by spark/arc discharge. The high temperature and current density of the plasma channel will cause erosion on the surface of the electrode material. In particular, in repetitive pulsed power systems, electrode erosion has a sizeable influence on the performance of the system. Recent research has proven the superior properties of W-Ni-Fe alloy over traditional W-Cu composites in spark gaps. Not only the resistance of arc erosion, but the operating characteristics were evidently improved when W-Ni-Fe alloy was applied. This paper focus on the erosion morphology evolution of W-Ni-Fe alloy electrodes in a spark gap. In the experiment, the electrodes were tested with 100 kA level pulsed discharges for 10,000 shots (~1.3 C of transferred charge per shot). Surface profiles of 4 pairs of 90WNiFe (90 wt.% of W), 93WNiFe (93 wt.% of W), 97WNiFe (97 wt.% of W), and 90WCu (90 wt.% of W) were measured. A group of parameters has been proposed to characterize the features of surface profiles. Evolution of surface morphology features was therefore analyzed based on those parameters.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78781986","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 on Discharge Pattern of Fluorinated Liquid under Boiling Condition 沸点条件下含氟液体排放规律的研究

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI: 10.1109/ICHVE49031.2020.9279939

Yonzshena Xu, B. Luo, Fuzeng Zhang, Xiangjun Zeng

引用次数: 3