沿海地区与内陆地区复合支柱绝缘子直流污闪特性比较

发布时间：2018-06-02 14:21

本文选题：沿海地区 + 复合支柱绝缘子　；参考：《电网技术》2014年05期

【摘要】：根据沿海地区绝缘子积污测量调研的结果,以不同盐灰比模拟沿海地区和内陆地区的复合支柱绝缘子积污特性,首先测量了两类试品在试验雾室内表面电阻随时间的变化趋势,然后在昆明特高压国家工程实验室进行直流人工污秽试验,试验过程中,用紫外放电仪对两类试品的局部放电现象进行观测,统计了紫外放电光子数,同时利用高速摄像机观察试品临闪电弧的发展情况。结果表明:灰密含量高的内陆地区试品表面电阻相对沿海地区试品低;在同盐密条件下,沿海地区试品的污闪电压高于内陆地区,且随着盐密的增加,两者差异越大;灰密大的内陆试品易产生局部电弧而出现干区,出现干区后,强吸水性使干区快速再次湿润,如此反复最后闪络,因此其污闪电压低;随着试验盐密的增加,不仅进一步降低试品表面电阻,还会使灰密高的内陆试品电弧桥接现象更明显,甚至出现电弧跨接现象,爬距利用率大幅降低,造成两者污闪电压值的差异更大。
[Abstract]:According to the results of measurement and investigation of insulators pollution in coastal areas, the pollution characteristics of composite strut insulators in coastal areas and inland areas are simulated with different salt ash ratios. First, the change trend of the resistance of two types of test products on the surface of the test fog indoor is measured. Then the direct current pollution test in the Kunming UHV National Engineering Laboratory is carried out. In the test process, the partial discharge phenomenon of the two types of test products was observed by ultraviolet discharge meter, the number of ultraviolet discharge photons was counted, and the development of the flash arc was observed with high speed camera. The results showed that the surface electrical resistance of the samples in the inland area with high gray density was lower than that in the coastal area. The pollution flashover voltage of the test products in Haiti is higher than that in the inland area, and the difference is greater with the increase of salt density, the difference is greater with the increase of salt density. The large gray inland test products are prone to produce local arc and appear dry area. After the emergence of dry area, the strong water absorbency makes the dry area moist again and again, so the pollution lightning is lower. As the test salt density increases, not only enters into the test salt density, but not only enters into the test salt density. In one step, the surface resistance of the test products will be reduced, and the phenomenon of arc bridging is more obvious in the inland trial products with high ash density, even the phenomenon of arc crossing, and the utilization rate of the climb distance is greatly reduced, which makes the difference of the value of the pollution flashover voltage greater.
【作者单位】：华南理工大学电力学院;南方电网科学研究院有限责任公司;广州市供电局;
【基金】：国家自然科学基金面上项目(51177052)~~
【分类号】：TM216

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