CAJ | 학술논문

雷电引起的输电线路事故中因绕击导致的故障所占比例很大,一些学者认为空间电荷的影响是导致屏蔽失效的原因之一。为此,通过试验研究了直流电压下球头棒-板间隙的电晕电流,以此来衡量一定电压下球头周围空间电荷的量;并试验研究了正极性操作冲击下球头棒-板间隙放电击中点的分布规律,且与尖头棒试验结果比较。试验结果和仿真结果表明：与尖头棒相比,球头棒更容易吸引放电;球头棒周围电场畸变不严重,没有形成有效屏蔽层,从而使放电点更容易发生在头部。
뇌전인기적수전선로사고중인요격도치적고장소점비례흔대,일사학자인위공간전하적영향시도치병폐실효적원인지일。위차,통과시험연구료직류전압하구두봉-판간극적전훈전류,이차래형량일정전압하구두주위공간전하적량;병시험연구료정겁성조작충격하구두봉-판간극방전격중점적분포규률,차여첨두봉시험결과비교。시험결과화방진결과표명：여첨두봉상비,구두봉경용역흡인방전;구두봉주위전장기변불엄중,몰유형성유효병폐층,종이사방전점경용역발생재두부。
Corona current of spherical rod-plane air gap under DC voltage was tested to measure the amount of space charge around the spherical rod under a certain voltage.The distribution of discharge striking points of spherical rod-plane air gap under positive switching impulse was studied,and the experimental results were compared with those from studying the sharply tipped rod.The comparison shows that the spherical rod attracts impulse discharge more easily.The test and simulation result show that no serious electric field distortion occurs around the spherical rod and no effective shielding layer is formed,which makes the discharge striking points easier to occur in the head part of the spherical rod.