哈郑特高压直流负极线路上U70BL型绝缘子自然积污规律

发布时间：2019-04-08 15:55

【摘要】：为了研究哈密—郑州±800 k V特高压直流(UHVDC)负极线路绝缘子的自然积污规律,在该线路河南段上选取了8基杆塔,在每基杆塔上的负极线路悬垂联板下方悬挂标准型悬式瓷绝缘子U70BL(原XP-70型绝缘子),并在相同高度悬挂不带电绝缘子串。经过冬季采暖期的积污后,测试并分析所有试验绝缘子上、下表面的盐密(ESDD)和灰密(NSDD)。结果表明,负极线路上的试验绝缘子表面灰密大于盐密,整体平均灰盐比为3.06。其上表面盐密约为下表面盐密的0.27倍,上表面灰密约为下表面灰密的0.58倍。负极线路上的带电绝缘子与不带电绝缘子的平均盐密比(带电积污系数)为1.26;而带电与不带电绝缘子上表面平均灰密比为0.82,下表面平均灰密比约为1,即±800 k V特高压直流负极线路绝缘子与不带电绝缘子的下表面灰密无明显差异。
[Abstract]:In order to study the natural pollution accumulation law of insulator of Hami-Zhengzhou 卤800kV ultra-high voltage direct current (UHVDC) negative electrode line, 8-base tower was selected in Henan section of this line. The standard suspended porcelain insulator U70BL (formerly XP- 70 insulator) is suspended under the pendant plate of the negative pole line on each base tower, and no electric insulator string is suspended at the same height. After pollution accumulation during winter heating, salt-dense (ESDD) and gray-dense (NSDD). On the upper and lower surfaces of all test insulators were tested and analyzed. The results show that the surface ash density of the test insulator on the negative electrode line is greater than that of the salt density, and the overall average ash-salt ratio is 3.06. The salt density on the upper surface is about 0.27 times that on the lower surface, and the gray density on the upper surface is about 0.58 times that on the lower surface. The average salt density ratio (charged fouling coefficient) between the charged insulator and the non-electric insulator on the negative electrode line is 1.26; On the other hand, the average gray density ratio of the upper surface and the lower surface of the electrified insulator is 0.82 and that of the lower surface is about 1, that is, there is no obvious difference between the insulator of 卤800 kV UHV DC negative circuit and the lower surface of the insulator without electric insulator.
【作者单位】：国网河南省电力公司电力科学研究院国网输电线路舞动防治技术重点实验室;华中科技大学强电磁工程与新技术国家重点实验室;国网河南省电力公司检修公司;
【基金】：国家电网公司重大科技项目(521700140004)~~
【分类号】：TM216;TM721.1

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