大气压氦气平行板介质阻挡放电的形式转换  

Discharge Transitions of Parallel Dielectric Barrier in Atmospheric Pressure Helium

作　　者：郝艳捧[1] 韩玉英[1] 黄之明 阳林[1] 李立浧[1] Hao Yanpeng;Han Yuying;Huang Zhiming;Yang Lin;Li Licheng(School of Electric Power South China University of Technology,Guangzhou 510640,China;Electric Power Research Institute,China Southern Power Grid Co.Ltd,Guangzhou 510663,China)

机构地区：[1]华南理工大学电力学院,广州510640 [2]南方电网科学研究院有限责任公司,广州510663

出　　处：《电工技术学报》2018年第13期3041-3050,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金面上项目(51777080);特高压工程技术(昆明;广州)国家工程实验室开放基金项目(NEL201608)资助

摘　　要：通过短时曝光图像和回路电流,研究了大气压氦气介质阻挡丝状、柱状、局部均匀和全部均匀等放电形式的特性、转换规律,以及柱状与丝状的区别与诊断方法。研究发现:气隙放电后降低外加电压放电仍维持;3 mm气隙含空气40 Pa在14 kHz、11.4 kHz或10 kHz的起始放电为全部均匀形式,由最低放电维持电压升高到起始放电电压,放电形式依次为局部均匀-柱状-全部均匀;3 mm气隙含空气20 Pa在10 kHz、12 kHz或14 kHz的起始放电为全部均匀形式,由最低放电维持电压升高到起始放电电压,放电依次为柱状-全部均匀;2 mm气隙含空气20 Pa在18 kHz的起始放电为柱状放电,由最低放电维持电压升高到超过起始放电电压,放电形式依次为丝状-柱状-全部均匀。电流波形有毛刺、无汤森放电、放电位置不固定等可诊断丝状放电。Transitions of filamentary discharges,columnar discharges,partial diffuse discharges,or diffuse discharges covering the whole electrodes,and methods to distinguish filamentary discharges from columnar discharges were investigated based on the measurements of loop currents and light emissions.It was found that the discharge could be sustained when the applied discharge was adjusted to a lower one below the discharge inception voltage.In the case of a background air pressure of 40 Pa,in a 3 mm gas gap,at the frequencies of 10 kHz,11.4 kHz or 14 kHz,a diffuse glow discharge covering the whole electrode initiated.With the discharge sustain voltage increasing from the lowest to the discharge inception voltage,transitions from a partial diffuse,a columnar to a diffuse discharge covering the whole electrodes occurred.While in the case of a background air pressure of 20 Pa,in a 3 mm gas gap,at the frequencies of 10 kHz,12 kHz or 14 kHz,a diffuse glow discharge covering the whole electrode initiated.With the discharge sustain voltage increasing from the lowest to the discharge inception voltage,a transition from a columnar to a diffuse discharge covering the whole electrodes occurred.While a columnar discharge was generated at the discharge inception voltage with a background air pressure of 20 Pa,in a 2 mm gas gap,at the frequency of 18 kHz.And with the discharge sustain voltage increasing from the lowest to ones exceeding the discharge inception voltage,transitions from filamentary,columnar to diffuse discharges covering the whole area of electrodes occurred.Many small burrs on the current curve,no Townsend breakdowns,nor microdischarges that do not take place at the same locations could be used to distinguish the filamentary discharge.

关 键 词：均匀放电 柱状放电 丝状放电 放电转换 

分 类 号：TM213[一般工业技术—材料科学与工程]