高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2012年
8期
2083-2090
,共8页
谢施君%贺恒鑫%向念文%谷山强%万军彪%陈维江%何俊佳%陈家宏%钱冠军%程正
謝施君%賀恆鑫%嚮唸文%穀山彊%萬軍彪%陳維江%何俊佳%陳傢宏%錢冠軍%程正
사시군%하항흠%향념문%곡산강%만군표%진유강%하준가%진가굉%전관군%정정
棒-棒放电%操作冲击%发展过程%跃变尺度%先导发展速度%空间先导
棒-棒放電%操作遲擊%髮展過程%躍變呎度%先導髮展速度%空間先導
봉-봉방전%조작충격%발전과정%약변척도%선도발전속도%공간선도
rod-rod discharge%switching impulse voltage%development process%scale of final jump%leader velocity%space leader
为揭示操作冲击作用下的棒-棒间隙放电过程,采用CCD高速摄影仪开展了2～10.5m间隙尺度正极性及1～4.5m间隙尺度负极性棒-棒间隙放电观测试验,根据观测结果总结了正、负极性棒-棒间隙放电发展过程,并获取了放电发展过程中跃变尺度、放电发展速度等特征参数随间隙尺度以及放电发展过程的变化规律。在正极性棒-棒间隙击穿过程中,正极性下行先导起主导作用;在负极性棒-棒间隙击穿过程中,梯级发展的负极性下行先导起主导作用;随着放电间隙尺度的增加,起主导作用的放电过程发展尺度占间隙的比例逐渐增加;跃变阶段的正、负极性先导发展速度均随先导的伸长而逐渐增加;负极性棒-棒间隙放电的跃变阶段可观测到空间先导的发展过程。试验观测研究进一步揭示了棒-棒间隙放电发展过程,可为棒-棒间隙放电物理过程研究提供参考。
為揭示操作遲擊作用下的棒-棒間隙放電過程,採用CCD高速攝影儀開展瞭2～10.5m間隙呎度正極性及1～4.5m間隙呎度負極性棒-棒間隙放電觀測試驗,根據觀測結果總結瞭正、負極性棒-棒間隙放電髮展過程,併穫取瞭放電髮展過程中躍變呎度、放電髮展速度等特徵參數隨間隙呎度以及放電髮展過程的變化規律。在正極性棒-棒間隙擊穿過程中,正極性下行先導起主導作用;在負極性棒-棒間隙擊穿過程中,梯級髮展的負極性下行先導起主導作用;隨著放電間隙呎度的增加,起主導作用的放電過程髮展呎度佔間隙的比例逐漸增加;躍變階段的正、負極性先導髮展速度均隨先導的伸長而逐漸增加;負極性棒-棒間隙放電的躍變階段可觀測到空間先導的髮展過程。試驗觀測研究進一步揭示瞭棒-棒間隙放電髮展過程,可為棒-棒間隙放電物理過程研究提供參攷。
위게시조작충격작용하적봉-봉간극방전과정,채용CCD고속섭영의개전료2～10.5m간극척도정겁성급1～4.5m간극척도부겁성봉-봉간극방전관측시험,근거관측결과총결료정、부겁성봉-봉간극방전발전과정,병획취료방전발전과정중약변척도、방전발전속도등특정삼수수간극척도이급방전발전과정적변화규률。재정겁성봉-봉간극격천과정중,정겁성하행선도기주도작용;재부겁성봉-봉간극격천과정중,제급발전적부겁성하행선도기주도작용;수착방전간극척도적증가,기주도작용적방전과정발전척도점간극적비례축점증가;약변계단적정、부겁성선도발전속도균수선도적신장이축점증가;부겁성봉-봉간극방전적약변계단가관측도공간선도적발전과정。시험관측연구진일보게시료봉-봉간극방전발전과정,가위봉-봉간극방전물리과정연구제공삼고。
In order to further reveal the discharge process of rod-rod air gap under switching impulse voltage,by means of two CCD high-speed cameras,discharge experiments with the gap scale of 2～10.5m for positive and 1～4.5m for negative were carried out.The discharge processes under positive or negative switching impulse voltage were proposed,and the variation laws of discharge characteristics,such as scale of final jump,leader development velocity,with gap scales were summarized.In positive rod-rod discharges,the positive continuous downward leader guides the discharge process.However,in negative rod-rod discharges,the negative downward stepped leader guides the discharge process.The effects of the guiding processes are more remarkable as the the gap scale increases.At the final jump stage,velocities of leaders increase with their elongations.Moreover,space leaders were observed at the final jump stage of negative discharges.The results clearly reveal the discharge process of rodrod air gap,and are benefit for studying the discharge mechanisms of the rod-rod discharges.
