Comparison of on-load voltage methods in artificial contamination test for insulators

被引：5
作者：
Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China [1 ]
不详 [2 ]
不详 [3 ]
机构：
[1] Graduate School at Shenzhen, Tsinghua University
[2] Electric Power Research Institute, China Southern Power Grid Co., Ltd.
[3] Yunnan Electric Power Test and Research Institute (Group) Co., Ltd.
来源：
Zhang, C. (zcy615@foxmail.com) | 2013年 / Science Press卷 / 39期
关键词：
Artificial contamination test; Composite insulators; High altitude area; Large tonnage porcelain insulator; On-load voltage method; Pollution flashover voltage; Salt deposit density; Shed configuration;
D O I：
10.3969/j.issn.1003-6520.2013.01.007
中图分类号：
学科分类号：
摘要：
To compare the influences of rise-voltage method and up-and-down method on results of artificial contamination test for insulators, and to enrich content of researches on insulators' external insulation, multiple insulator tests were performed in natural high altitude (2100 m) area. Test specimen insulators include three large tonnage porcelain insulators with different types, XWP-300kN and XHP2-300 for AC system, XZP-300 for DC system and two long-string composite insulators with different shed configurations, and artificial contamination tests were performed under both AC and DC voltage using the two methods, respectively. Test results indicate that the pollution flashover voltage obtained by rise-voltage method is generally higher than that of up-and-down method under both AC and DC voltage; under AC voltage, the difference is around 11% for porcelain insulators, but for composite insulators, the relationship between flashover voltage and salt density is also influenced by the insulator shed configuration. For DC tests on composite insulators, no regular differences exist between the flashover voltages, so the correction between them is unsuited. Further analyses show that the differences in results between these two methods are mainly due to the differences of surface condition of the test insulators during the test process. This work can provide experimental support and references for the comparison of test results from different researchers and establishment of artificial contamination test standard for composite insulators.
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页码：44 / 53
页数：9
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