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电网技术  2011 

气体绝缘组合电器尖端放电发展过程的试验研究

, PP. 157-162

Keywords: 气体绝缘组合电器,尖端放电,发展特性,变化规律

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Abstract:

研究局部放电发展过程有助于对放电故障的严重程度做出准确的评估,给出合理的设备维修策略。尖端放电是发生在气体绝缘组合电器设备中的一种常见的典型局部放电故障,通过研究尖端放电发展过程中各个阶段的特高频局部放电检波信号的放电模式特征,给出了各放电发展阶段中放电特征参数随试验时间的发展变化规律,为该类型局部放电故障严重程度的诊断提供了依据。研究结果表明对于尖端放电而言,放电幅值和放电次数随试验时间的延长表现出先增大后减小的趋势,正负半周上放电次数之比和正负半周上最大放电幅值之比随试验时间的延长表现出逐渐增大的趋势,放电次数的降低速度随放电相对幅值的增加越来越快。

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