Corona suppression analysis of rigid jumper in double-circuit tension tower for 1000 kV ultra high voltage AC transmission line

被引：0
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作者：
机构：
[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University
来源：
Yang, X. (yangxiabc@foxmail.com) | 1839年 / Science Press卷 / 40期
关键词：
Corona measurement; Double-circuit tension tower; Electric field distribution; Finite element method; Rigid jumper; Ultra high voltage;
D O I：
10.13336/j.1003-6520.hve.2014.06.032
中图分类号：
学科分类号：
摘要：
The structures of double-circuit tension towers used in 1000 kV ultra high voltage AC transmission lines are complex. To analyze the electric field distribution on the surface of the rigid jumpers to inhibit the corona discharge on the tension tower, we calculated the electric field distribution on the surface of the aluminum-tube rigid jumper and compared the factors influencing the distribution on jumper. Taking the effect of tower, fittings, insulator strings, and phase into consideration, we conducted the calculation using ANSYS. Then, using JTP3, the single-circuit tension tower in the 1000 kV AC pilot project, as an example, we determined the tower's electric field strength standard through electric field calculation and field corona measurement. Lastly we studied the variation of the electric field distribution on the jumper surface with the changes of sag height, angle of tower and jumper diameter. The results show that, the influence of phase is more significant, meanwhile the tower, ground, and another circuit influence the electric field distribution by less than 5%. The critical value of the electric field can be determined as 2600 kV/m. It is suggested to use JL/G3A-900/40 as the rigid jumper while assuring the sag height is less than 0.2 m.
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页码：1839 / 1846
页数：7
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