高压电器2025，Vol.61Issue(2)：180-188,9.DOI:10.13296/j.1001-1609.hva.2025.02.021
全氟己酮对棒—板短空气间隙工频击穿特性的影响
Influence of Perfluoro on Power Frequency Breakdown Voltage Characteristics of Rod-plate Short Air Gap
摘要
Abstract
Perfluoro is a new type of fire extinguishing agent with high boiling point and meets the requirement of far distance of fire extinguishing spray of valve hall,good insulation performance and no pollution.In this paper,the influence of the perfluoro droplets with a diameter of 719.0 μm and gaseous perfluoro on the discharge charac-teristics of the short rod-plate air gap is studied.Under a 4 cm rod-plate gap,when the flow rate is risen from 0.27 L/min to 1.94 L/min,the breakdown field strength of the perfluoro droplets-air two-phase mixture is increased from 11.85 kV/cm to 14.35 kV/cm(it is 1.69 times higher than the breakdown field strength of the air gap).When the concentration of gaseous perfluoro is increased from 0.44%to 10.25%,the breakdown field strength of perfluoro gas-air mixture is risen from 10.50 kV/cm to 18.68 kV/cm(it is 2.65 times higher than the breakdown field strength of the air gap).The discharge development is hindered by the electronegativity of perfluoro gas,the temperature drop due to vaporization of the perfluoro droplets and the charge of the perfluoro droplets and the the breakdown voltage of the gap is increased.The discharge development is promoted by the distorting electric field of the perfluo-ro droplets and the photoionization effect.However,the electronegativity of perfluoro gas and the charging of perfluo-ro droplets are the main reason for increasing the discharge voltage of the gap.The results can provide guidance for the application of perfluoro in preventing electrical fires.关键词
阀厅/全氟己酮/棒—板间隙/工频/击穿电压Key words
valve hall/perfluoro/rod-plate air gap/power frequency/breakdown voltage引用本文复制引用
邓捷,陈宝辉,陆佳政,梁平,吴传平,朱鸿章,方针..全氟己酮对棒—板短空气间隙工频击穿特性的影响[J].高压电器,2025,61(2):180-188,9.基金项目
湖南省重点领域研发计划(2021SK2049) （2021SK2049）
国家电网公司科技项目(5216A021003N).Project Supported by Key Research and Development Plan of Hunan Province(2021SK2049),Subject of State Grid Corporation of China(5216A021003N). （5216A021003N）
