ZnO电阻片寿命内冲击老化的研究

分析了冲击电流对ZnO电阻片的老化影响。通过试验研究放电电流的幅值大小、波形、放电次数以及环境温度四个因素对老化的影响,并推导基本规律;结合标准对非线性金属氧化物电阻片性能要求的规定,提出能够一定程度上反映ZnO电阻片剩余寿命的参数,给带间隙线路避雷器提供了一种新的在线监测方法。相关的产品已经研发出来,现场应用效果良好。

Study on Surge Degradation During Lifetime of ZnO Resistance

The impact of impulse current to the aging of ZnO resistance was analyzed.The effect of four factors on aging which included circumstance temperatures,amplitudes,waveforms and times of discharge current were studied by test,and some fundamental principle was induced;incorporated with non-linear metal oxide resistance performance requirements prescribed by standards,a parameter in flecting rest lifetime of arrester resistance was proposed.The result afforded a new online testing method to monitor line arresters with gap,some related products was produced with well application experiences.