CAJ | 학술논문

人们对空间电荷对放电过程的影响研究较少,但很多试验现象体现了空间电荷的作用。为了研究空间电荷对放电击中点的影响,建立了试验平台,并用高速摄像机观测了放电现象。正极性直流与雷电冲击联合加压试验与正雷电冲击电压试验,体现了预加直流电压产生的空间电荷对放电击中点的影响;正极性操作冲击电压试验,研究了不同电压幅值下放电击中点的变化。试验结果表明：正极性雷电冲击电压下,预加直流在针电极附近产生的空间电荷对空间电场的畸变作用不显著;在正极性操作冲击电压下,随着电压幅值的增加,空间电荷对针电极头部电场的屏蔽作用有所提高,放电点远离针电极头部的距离加大。
인문대공간전하대방전과정적영향연구교소,단흔다시험현상체현료공간전하적작용。위료연구공간전하대방전격중점적영향,건립료시험평태,병용고속섭상궤관측료방전현상。정겁성직류여뇌전충격연합가압시험여정뇌전충격전압시험,체현료예가직류전압산생적공간전하대방전격중점적영향;정겁성조작충격전압시험,연구료불동전압폭치하방전격중점적변화。시험결과표명：정겁성뇌전충격전압하,예가직류재침전겁부근산생적공간전하대공간전장적기변작용불현저;재정겁성조작충격전압하,수착전압폭치적증가,공간전하대침전겁두부전장적병폐작용유소제고,방전점원리침전겁두부적거리가대。
Although there was little research about the effect of space charge on discharge process,the influence of space charge was shown in many experimental phenomena.In order to study the effect of space charge on discharge striking points,the testing platform was set up and the discharge phenomena were observed by means of high-speed video camera.The effect of space charge generated by pre-adding DC voltage on discharge striking points was reflected by the combined voltage of positive DC voltage and lightning impulse voltage experiment.The positive switching impulse voltage test studied the change of discharge striking points at different voltage amplitudes.The test results demonstrate that there is no evident distortion effect of space charge around the needle electrode generated by pre-adding DC voltage on the space electric field under positive lightning impulse voltage.Influenced by the positive switching impulse voltage,with the increasing voltage amplitude,the shielding effect of space charge on the electric field of needle electrode head becomes stronger,and the distance between discharge striking points and needle electrode head becomes longer.