C_(6)F_(12)O/CO_(2)混合气体沿面放电分解特性研究  

Decomposition Characteristics of C_(6)F_(12)O/CO_(2)Gas Mixture in Surface Discharge

作　　者：田双双 王家浩 孟飞 胡峰 刘本立 骆永超 张晓星 TIAN Shuangshaung;WANG Jiahao;MENG Fei;HU Feng;LIU Benli;LUO Yongchao;ZHANG Xiaoxing(Hubei Engineering Research Center for Safety Monitoring of New Energy and Power GridEquipment,Hubei University of Technology,Wuhan 430068,China;State Grid ShanghaiJiading Electronic Power Supply Company,Shanghai 201800,China)

机构地区：[1]湖北工业大学新能源及电网装备安全监测湖北省工程研究中心,武汉430068 [2]国网上海嘉定供电公司,上海201800

出　　处：《高压电器》2023年第9期35-43,共9页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(52277144);湖北省自然科学基金资助项目(2021CFA025)。

摘　　要：C_(6)F_(12)O/CO_(2)混合气体具有在中低压气体设备中应用的潜力,设备运行中因固体绝缘表面金属异物存在引发的沿面放电,是绝缘劣化及故障发生的隐患之一,研究C_(6)F_(12)O/CO_(2)混合气体沿面放电的分解特性对设备的运维具有重要意义。为此,文中开展不同实验电压下C_(6)F_(12)O/CO_(2)混合气体沿面放电分解实验,利用气相色谱法对分解组分进行定量分析,获得了不同放电强度下主要分解组分种类及其分解特性,讨论了产气速率与放电强度间的关系。结果表明:C_(6)F_(12)O/CO_(2)混合气体沿面放电主要分解产物为CF_(4)、C_(2)F_(6)、C_(3)F_(8)、C3F7H和C_(3)F_(6);各产物分解特性相似,体积分数随放电量体现“线性—饱和”增长趋势,30 kV下对应饱和体积分数分别为21.3、7.0、11.9、7.7、13.7μL/L;主要组分产气速率关系为:v(CF_(4))>v(C_(3)F_(6))>v(C_(3)F_(8))>v(C3F7H)>v(C_(2)F_(6)),其中CF_(4)产气速率从1.2(μL·L^(-1))/12 h增至3.1(μL·L^(-1))/12 h,与放电量关联性最好,可作为沿面放电下放电强度的判定依据。研究可为C_(6)F_(12)O/CO_(2)混合气体绝缘设备的工程应用方案提供参考。The C_(6)F_(12)O/CO_(2)gas mixture shows promise for use in low to medium-voltage gas equipment.However,the presence of foreign metallic objects on solid insulation surfaces can result in surface discharge during equipment operation,increasing the risk of insulation degradation and failure.Therefore,it is important to study the decomposition characteristics of C_(6)F_(12)O/CO_(2)surface discharge to ensure proper equipment operation and maintenance.In this study,surface discharge decomposition experiments of the C_(6)F_(12)O/CO_(2)gas mixture were conducted under different experimental voltages.The decomposed components were quantitatively analyzed using gas chromatography.The types and characteristics of the main decomposition products under different discharge intensities were obtained,and the relationship between gas production rate and discharge intensity was discussed.The results show that the main decomposition products of C_(6)F_(12)O/CO_(2)surface discharge are CF_(4)、C_(2)F_(6)、C_(3)F_(8)and C3F7H.The decomposition characteristics of each product are similar,and the content shows a‘linear-saturated’growth trend with increasing discharge intensity.The corresponding saturation concentrations under 30 kV are 21.3、7.0、11.9、7.7、13.7μL/L,respectively.The gas production rate of each major component follows the order:v(CF_(4))>v(C_(3)F_(6))>v(C_(3)F_(8))>v(C3F7H)>v(C_(2)F_(6)),and the gas production rate of CF_(4)increases from 1.2(μL·L^(-1))/12 h to 3.1(μL·L^(-1))/12 h,which has the best correlation with discharge intensity and can be used as a criterion for determining discharge intensity under surface discharge.This study provides a reference for the engineering application of C_(6)F_(12)O/CO_(2)gas mixture insulation equipment.

关 键 词：C_(6)F_(12)O/CO_(2)混合气体 沿面放电 主要分解产物 分解特性 产气速率 

分 类 号：TM213[一般工业技术—材料科学与工程]