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电网技术  2015 

复合绝缘子老化状态精细评估中的取样方法

DOI: 10.13335/j.1000-3673.pst.2015.02.036, PP. 530-535

Keywords: 复合绝缘子,老化状态,精细评估,取样方法,傅里叶红外光谱,测试方法

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Abstract:

精细评估可以为复合绝缘子老化状态提供更为准确丰富的信息,而评估中的取样方法不仅影响对绝缘子老化状态及剩余寿命的判定,也与试验测试效率紧密相关。以百余串复合绝缘子为研究对象,利用研制的切片机获得了厚度均匀的薄片试样,借助傅里叶红外光谱(Fouriertransforminfrared,FTIR)测试技术,系统地对复合绝缘子老化状态精细评估中的取样方法进行了研究。通过对距离伞裙上表面不同深度的试样进行FTIR测试,确定了后续研究中用以反映材料本体特性的“参照试样”;通过对不同厂家和不同运行环境下的复合绝缘子试样进行测试,研究了抽样方案对老化评估的影响;通过对绝缘子不同位置的伞裙和伞裙不同方位的试样进行测试分析,探索了切片方案对复合绝缘子老化评估的影响规律。进而提出了一套适用于现场复合绝缘子老化状态精细评估的取样方法,为复合绝缘子在特高压工程中的应用及相关标准的制定提供了一定理论依据。

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