仝殿杰, 赵秋琳, 曹人杰, 王璁, 屠幼萍, 郑重. C4F7N/CO2/O2混合气体局部放电起始电压的试验研究[J]. 高电压技术, 2023, 49(3): 1007-1014. DOI: 10.13336/j.1003-6520.hve.20220778
引用本文: 仝殿杰, 赵秋琳, 曹人杰, 王璁, 屠幼萍, 郑重. C4F7N/CO2/O2混合气体局部放电起始电压的试验研究[J]. 高电压技术, 2023, 49(3): 1007-1014. DOI: 10.13336/j.1003-6520.hve.20220778
TONG Dianjie, ZHAO Qiulin, CAO Renjie, WANG Cong, TU Youping, ZHENG Zhong. Experimental Study on Partial Discharge Initial Voltage of C4F7N/CO2/O2 Mixed Gas[J]. High Voltage Engineering, 2023, 49(3): 1007-1014. DOI: 10.13336/j.1003-6520.hve.20220778
Citation: TONG Dianjie, ZHAO Qiulin, CAO Renjie, WANG Cong, TU Youping, ZHENG Zhong. Experimental Study on Partial Discharge Initial Voltage of C4F7N/CO2/O2 Mixed Gas[J]. High Voltage Engineering, 2023, 49(3): 1007-1014. DOI: 10.13336/j.1003-6520.hve.20220778

C4F7N/CO2/O2混合气体局部放电起始电压的试验研究

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

  • 摘要: 研究C4F7N/CO2/O2环保绝缘气体的局部放电特性,可为环保型气体绝缘电气设备的设计制造及运维提供技术支撑。为此,利用针–板电极研究了极不均匀电场中C4F7N/CO2/O2混合气体的交流局部放电起始电压(partial discharge initial voltage, PDIV),并分析了O2的体积分数、气压以及电场不均匀系数对其PDIV的影响。试验结果表明:在0.15~0.25 MPa气压范围内,C4F7N/CO2混合气体中加入O2体积分数不宜超过4%;而在0.35~0.65 MPa气压范围内,3种O2占比中,在C4F7N/CO2混合气体加入体积分数为4%的O2的方案相对最优。混合气体的PDIV随气压的变化会出现“驼峰效应”;O2体积分数小于8%时,不均匀系数的增加能够有效减少C4F7N/CO2/O2和C4F7N/CO2这2种混合气体PDIV幅值的差别;而O2体积分数高于8%时,不均匀系数的变化对2种混合气体幅值差别的改变影响很小。因此,从混合气体交流局部放电起始电压角度考虑,C4F7N/CO2/O2混合气体具备应用于气体绝缘交流设备的可行性。

     

    Abstract: 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.

     

/

返回文章
返回