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Partial Discharge Decomposition Characteristics of SF6/N2 Gas Mixtures under Insulator Air Gap Defects and Free Metal Particle Defects
Jin Bai;Xiu Zhou;Tian Tian;Lei Chen;Shangpeng Sun;Ao Zhan;Fanchao Ye
2024 9th Asia Conference on Power and Electrical Engineering (ACPEE)
Year: 2024 | Conference Paper |
Cited by: Papers (1)
The use of $\mathrm{SF}_{6} / \mathrm{N}_{2}$ gas mixtures in gas-insulated equipment reduces the greenhouse effect of pure sulfur hexafluoride gas. In this paper, the partial discharge decomposition of $\mathrm{SF}_{6} / \mathrm{N}_{2}$ gas mixtures under insulator air gap defects and free metal particle defects is investigated. The results show that the main decomposition products of $\mathrm{SF...Show More
Measurement of Implus Surface Flashover Voltage of Epoxy Resin in Liquid Nitrogen
Jin Bai;Xiu Zhou;Tian Tian;Yan Luo;Yunlong Ma;Weifeng Liu;Zecheng Li;Yizhe Jiao;Shuang Lu;Xin Yang
2023 IEEE 5th International Conference on Power, Intelligent Computing and Systems (ICPICS)
Year: 2023 | Conference Paper |
With the development of superconducting power devices, the research of the characteristics of surface flashover of insulation materials in low-temperature environments is getting increasingly important. In this paper, the flashover voltage along the surface of epoxy resin in liquid nitrogen were measured. The first flashover voltage along the surface at different spacings were measured by using ri...Show More
Cause Analysis and Preventive Measures of Abnormal 750 kV Arrester
Xiu Zhou;Jin Bai;Weifeng Liu;Guangyao Qiao;Fangyi Li;Xiujuan Chen;Haibing Fan
2023 8th Asia Conference on Power and Electrical Engineering (ACPEE)
Year: 2023 | Conference Paper |
This paper describes the abnormal heating of the metal oxide arrester at the high voltage side of 750 kV main transformer. Infrared temperature measurement, insulation resistance and capacitance test data were used to preliminarily determine the cause of abnormal heating. It was found that the upper four sections and the lower two sections of the arrester were installed reversely through disassemb...Show More
Fault Diagnosis Method of Oil-Immersed Transformer Based on the Production Pattern of Free Gas and Dissolved Gas in Oil
Xiu Zhou;Tian Tian;Ningbo Liu;Jin Bai;Yan Luo;Ninghui He;Pengcheng Zhang;Jun Sun
2022 Asia Power and Electrical Technology Conference (APET)
Year: 2022 | Conference Paper |
Monitoring the operating state of oil immersed transformer by free gas is an effective means to prevent equipment from burning and explosion. However, there is no research on the production pattern of free gas under different fault conditions. In this paper, the production pattern of free gas under discharge fault and thermal fault is obtained through experiments, and the dissolved gas in oil is c...Show More
Fault analysis of 750kV high voltage reactor based on multiple physical fields
Xiu Zhou;Jin Bai;Zhonghua Xiang;Tian Tian;Kui Ma;Yan Luo;Xiuguang Li;Yang Wu;Heng Zhang
2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)
Year: 2022 | Conference Paper |
The parallel oil immersed reactor of 750 kV ultra-high voltage can improve the reactive power operation state of the 750 kV line. When the 750 kV line is lightly empty or lightly loaded, the line has capacitance effect, which can be used to reduce the power frequency transient overvoltage and improve the voltage distribution. This is the reason why the high voltage reactor of Hehu II line in Helan...Show More
Analysis of Oil Flow Relay Baffle Fracture
2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)
Year: 2022 | Conference Paper |
The oil flow relay is an important protection device for the transformer. Once a fault occurs, it will not be able to grasp the status of the transformer in time, which will bring huge hidden dangers to the safe and stable operation of the power grid. This paper introduces a fracture fault of the oil flow relay baffle, mainly through the three-dimensional simulation software to simulate the force ...Show More
Grounding Safety Design Method of Urban Transmission Steel Tube Tower
2022 China International Conference on Electricity Distribution (CICED)
Year: 2022 | Conference Paper |
The grounding designs of urban transmission steel pipe towers in densely populated areas rarely considers the step voltage and contact voltage indexes, which has potential safety hazard. This paper calculates the maximum allowable value of each safety index of tower grounding device under the condition of power frequency short circuit and lightning strike, and calculates the actual value of safety...Show More
The method of improving the lightning resistance level of 10kV multi-circuit overhead line with parallel gap
2022 China International Conference on Electricity Distribution (CICED)
Year: 2022 | Conference Paper |
The method of single phase same line installation of parallel gaps on a can effectively improve the lightning resistance level of 10kV overhead distribution lines. However, current related research methods only involve the effect on the lightning withstands level of 10kV single-circuit overhead lines. There are still problems in the matching of the number of parallel gaps, installation positions a...Show More
Analysis and Treatment of Abnormal Growth of Total Hydrocarbon in ±800kV Converter Transformer
Xiu Zhou;Qingping Zhang;Xutao Wu;Tian Tian;Bo Niu;Jin Bai;Xiuguang Li
2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
This paper conducts research and analysis on the abnormal condition of total hydrocarbon in the main body of ±800kV Lingzhou UHV converter station of Ningxia power grid during operation. Firstly, through the on-line and off-line observation and analysis of oil chromatographic data, and then through the licensing of live and power failure test data, and through the return to the plant physical exam...Show More
Study on Fault Diagnosis of Metal Oxide Surge Arrester Based on Infrared Detection and Leakage Current Detection
2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
As an efficient and safe non-contact live detection method, infrared detection technology is widely used in MOA state detection. However, due to the limitations of this detection method and the low detection accuracy, it has caused a loss of manpower and material resources. This paper proposes a multi-criteria joint detection method based on infrared detection and leakage current detection, which ...Show More
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