Experimental Study on Partial Discharge Initial Voltage of C4F7N/CO2/O2 Mixed Gas

被引：0
|
作者：
Tong D. [1 ]
Zhao Q. [1 ]
Cao R. [1 ]
Wang C. [1 ]
Tu Y. [1 ]
Zheng Z. [1 ]
机构：
[1] Beijing Key Laboratory of High Voltage & EMC, North China Electric Power University, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2023年 / 49卷 / 03期
关键词：
C4F7N/CO2/O2; hump effect; non-uniform electric field; partial discharge initial voltage; pulse current method;
D O I：
10.13336/j.1003-6520.hve.20220778
中图分类号：
学科分类号：
摘要：
Studying the partial discharge characteristics of C4F7N/CO2/O2 environmentally friendly insulating gas can provide technical supports for the design, manufacture, and operation and maintenance of environmentally friendly gas-insulated electrical equipment. The partial discharge initial voltage (PDIV) of C4F7N/CO2/O2 mixture gas in an extremely non-uniform electric field is studied by using a needle-plate electrode, and the effects of O2 volume fraction, air pressure and electric field non-uniformity coefficient on PDIV are analyzed. The experimental results show that, in the pressure range of 0.15~0.25 MPa, the volume fraction of O2 added into the C4F7N/CO2 mixture should not exceed 4%, while in the pressure range of 0.35~0.65 MPa, among the three proportions of O2, the scheme of adding 4% O2 by volume to the C4F7N/CO2 mixture is relatively optimal. The “hump effect” will appear in PDIV of mixed gas with the change of air pressure. When the volume fraction of O2 is less than 8%, the increase of the inhomogeneity coefficient can effectively reduce the difference of PDIV amplitude between C4F7N/CO2/O2 and C4F7N/CO2, however, when the volume fraction of O2 is higher than 8%, the change of inhomogeneity coefficient has a negligible influence on the change of amplitude difference between the two mixed gases. Therefore, from the perspective of the initial voltage of the mixed gas AC partial discharge, the C4F7N/CO2/O2 mixed gas has the feasibility of being applied to gas-insulated AC equipment. © 2023 Science Press. All rights reserved.
引用
收藏
页码：1007 / 1014
页数：7
相关论文
共 28 条
  • [1] SHI Rongbin, QIN Weiqi, ZHANG Meng, Et al., Temperature distribution of UHV C4F7N/CO2 mixed gas GIL, High Voltage Engineering, 48, 2, pp. 698-705, (2022)
  • [2] ZHANG Zhen, LIN Xin, YU Weicheng, Et al., Thermodynamic calculation of physical properties of C4F7N/CO2 and C4F7N/N2, High Voltage Engineering, 46, 1, pp. 250-256, (2020)
  • [3] YANG Tao, ZHANG Boya, LI Xingwen, Et al., Experimental study of decomposition products of C4F7N/CO2 mixture under different fault conditions, High Voltage Engineering, 47, 12, pp. 4216-4228, (2021)
  • [4] KIEFFEL Y, BIQUEZ F., SF6 alternative development for high voltage switchgears, Proceedings of 2015 IEEE Electrical Insulation Conference, pp. 379-383, (2015)
  • [5] LI Xingwen, DENG Yunkun, JIANG Xu, Et al., Insulation performance and application of enviroment-friendly gases mixtures of C4F7N and C5F10O with CO2, High Voltage Engineering, 43, 3, pp. 708-714, (2017)
  • [6] GAO Keli, YAN Xianglian, WANG Hao, Et al., Progress in environment-friendly gas-insulated transmission line (GIL), High Voltage Engineering, 44, 10, pp. 3105-3113, (2018)
  • [7] YAN Xianglian, GAO Keli, ZHENG Yu, Et al., Progress of gas mixture and alternative gas of SF6, Power System Technology, 42, 6, pp. 1837-1844, (2018)
  • [8] NECHMI H E, BEROUAL A, GIRODET A, Et al., Fluoronitriles/CO2 gas mixture as promising substitute to SF6 for insulation in high voltage applications, IEEE Transactions on Dielectrics and Electrical Insulation, 23, 5, pp. 2587-2593, (2016)
  • [9] WANG Cong, Insulation and PD decomposition characteristics and mechanism of C4F7N and its mixture gas, (2020)
  • [10] CHEN Qi, ZHANG Xiaoxing, LI Yi, Et al., Effects of O2 on the insulation and discharge decomposition characteristics of C4F7N-N2-O2 gas mixture, High Voltage Engineering, 46, 3, pp. 1028-1036, (2020)
123