CAJ | 학술논문

为利用硅橡胶材料的电导电流特性对复合绝缘子进行老化状态评估，以现场运行的复合绝缘子为试验对象进行研究。通过电导电流测试得到不同运行年限试样的电老化阈值，并根据电老化阈值评估试样的老化状态，再通过静态接触角测量结果分析试样的憎水性，最后利用扫描电镜测试分析试样的表面微观。初步试验发现，试样的老化程度越严重，其陷阱能级越深、电老化阈值越低、电导电流数值越大；新试样的电老化阈值在10 kV/mm左右，运行15 a的试样电老化阈值在5.5 kV/mm 左右；老化严重的试样电导电流较新试样要高出数倍；陷阱载流子密度与电老化阈值成正比关系；试样的电老化阈值与其憎水性、表面微观有着高度的对应关系。研究表明，通过硅橡胶材料的电导电流测试得到的电老化阈值，基本可以反映绝缘材料老化状态，电老化阈值有可能会成为硅橡胶复合绝缘子老化状态评估的新判据。
위이용규상효재료적전도전류특성대복합절연자진행노화상태평고，이현장운행적복합절연자위시험대상진행연구。통과전도전류측시득도불동운행년한시양적전노화역치，병근거전노화역치평고시양적노화상태，재통과정태접촉각측량결과분석시양적증수성，최후이용소묘전경측시분석시양적표면미관。초보시험발현，시양적노화정도월엄중，기함정능급월심、전노화역치월저、전도전류수치월대；신시양적전노화역치재10 kV/mm좌우，운행15 a적시양전노화역치재5.5 kV/mm 좌우；노화엄중적시양전도전류교신시양요고출수배；함정재류자밀도여전노화역치성정비관계；시양적전노화역치여기증수성、표면미관유착고도적대응관계。연구표명，통과규상효재료적전도전류측시득도적전노화역치，기본가이반영절연재료노화상태，전노화역치유가능회성위규상효복합절연자노화상태평고적신판거。
To assess the aging state of composite insulator by conduction current characteristic of silicon rubber material, the composite insulators being operated in the field are taken as samples. Through the testing of conduction current the electrical degradation thresholds for the samples experienced different operated durations are achieved; according to the electrical degradation thresholds the aging states of the samples are assessed;the hydrophobicity of samples is analyzed by the measured results of static contact angles is analyzed; finally, the surface micro textures of samples are tested and analyzed by scanning electron microscope. Preliminary tests found that the more serious aging degree of samples, the deeper their trap levels are, and the lower the electrical degradation threshold, the larger the conduction current values are; the electrical degradation threshold of the sample with shorter operation duration is about 10kV/mm, and the electrical degradation threshold of the sample with operated duration of 15 years is about 5.5kV/mm; the conduction current of seriously aged samples is several times higher than that of the sample with shorter operation duration; the carrier density of the trap is in direct proportion to the electrical degradation threshold; the electrical degradation threshold of the sample highly corresponds to its hydrophobicity and surface micro texture. Research results show that the electrical degradation threshold obtained by conduction current test of silicon rubber material can basically reflect the aging state of insulation material, thus the electrical degradation threshold could be a new criterion to assess the aging state of silicon rubber composite insulators.