特高压交流线路Y型复合绝缘子串静电场分布

发布时间：2018-04-18 06:02

本文选题：特高压 + Y型复合绝缘子串　；参考：《电工技术学报》2017年21期

【摘要】：通过建立理想条件下特高压双回输电线路Y型复合绝缘子串的三维静电场有限元分析模型,计算了Y型绝缘子串和均压环表面电场分布。分析了串长比例、V串部分夹角和单双联串型对绝缘子串和均压环电场分布的影响。研究结果表明,串长比例和夹角对跑道型均压环和复合绝缘子表面电场强度最大值的影响与导线到上横担的距离密切相关。仅从静电场角度分析,建议串长比例为4 m/5 m(I部分/V部分),相比初设参数2 m/7 m,跑道环表面最大电场强度降低了1.6%,复合绝缘子降低了3.5%,相同串长位置(2 m)处承担电压降低了13.2%;鉴于夹角变化时均压环和复合绝缘子表面最大电场强度变化都在2%以内,建议夹角保持初设参数105°;单联Y型串各部分最大电场强度均小于双联Y型串,其中I串大环达8.7%,复合绝缘子21.9%,串型选择建议采用单联Y型串。
[Abstract]:By establishing a three-dimensional electrostatic field finite element analysis model of Y type composite insulator string for UHV double circuit transmission line under ideal conditions, the electric field distribution on the surface of Y type insulator string and uniform voltage ring is calculated.The effects of partial angle and single double string type on the electric field distribution of insulator string and voltage uniform ring are analyzed.The results show that the influence of length ratio and angle on the maximum electric field intensity on the surface of the runway uniform ring and composite insulator is closely related to the distance from the conductor to the upper transverse pole.Only from the angle of electrostatic field,Compared with the initial parameter of 2 m / 7 m, the maximum electric field intensity on the surface of the runway ring is reduced 1.6%, the composite insulator decreases 3.5%, and the bearing voltage at the same length position of 2 m is reduced by 13.2m.The maximum electric field intensity on the surface of both the equal-pressure ring and the composite insulator is within 2%.It is suggested that the angle should be kept at the initial setting parameter 105 掳, and the maximum electric field intensity of each part of the single Y string is lower than that of the double Y string, in which the I string has a large loop of 8.7 and the composite insulator is 21.9.The single Y type string is recommended for the selection of the string type.
【作者单位】：武汉大学电气工程学院;中国电力科学研究院;
【基金】：国家电网公司总部科技项目资助(GY71-14-034)
【分类号】：TM216;TM75

【相似文献】