盘形悬式绝缘子空气中冲击击穿试验电压峰值的影响因素分析和试验研究

Analysis and Experimental Studies of Peak Value of Puncture Impulse Voltage in Air on Cap and Pin Insulators

依据空气中冲击击穿的试验原理,分析了影响陡波前冲击电压峰值的原因,设计完成了进一步的试验研究。发现对于确定的盘形悬式绝缘子样品,单纯提高冲击电压发生器的输出电压峰值并不能有效提高陡波前冲击电压的峰值,适当调整陡化球隙的距离可以改善这一情况;同时,相同条件不同极性下的陡波前冲击电压峰值存在很大差距。

Based on the test principle of puncture in air under impulse voltage of the cap and pin insulator, the influencing factors on the peak value of the steep front impulse vokage are analyzed and experimental investigations are carried out. Test results show that the peak value of steep front impulse voltage can＇t be increased by only increasing the charging voltage of the generator, and the correct way is to adjusting the distance between the steepening spheres. Great difference exists in the he peak values of steep front impulse voltage for different impulse polarities.