Study on Capture Effect of Particle Trap in 1000 kV AC GIL

ZHAO Ke; TENG Yun; ZHUANG Tianxin; GAO Shan; LI Hongtao; LI Yujie; SANG Zhiyue

doi:10.13296/j.1001-1609.hva.2025.12.020

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Study on Capture Effect of Particle Trap in 1000 kV AC GIL

Research & Analysis | 更新时间：2025-12-09

- Study on Capture Effect of Particle Trap in 1000 kV AC GIL
- High Voltage Apparatus Vol. 61, Issue 12, Pages: 146-153(2025)
- 作者机构：
  
  国网江苏省电力有限公司电力科学研究院，南京 211100
  平高集团有限公司，河南平顶山 467000
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2025.12.020
  CLC：
- Received：20 May 2025，
  
  Revised：2025-07-29，
  
  Published：16 December 2025
- 稿件说明：
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ZHAO Ke, TENG Yun, ZHUANG Tianxin, et al. Study on Capture Effect of Particle Trap in 1000 kV AC GIL[J]. High Voltage Apparatus, 2025, 61(12): 146-153.
DOI：

ZHAO Ke, TENG Yun, ZHUANG Tianxin, et al. Study on Capture Effect of Particle Trap in 1000 kV AC GIL[J]. High Voltage Apparatus, 2025, 61(12): 146-153. DOI： 10.13296/j.1001-1609.hva.2025.12.020.

摘要

针对特高压GIL中金属微粒可能引发的绝缘故障，该文设计并研制了1000 kV GIL真型试验样机，在盆式绝缘子凸侧和三支柱绝缘子附近布置铝、铜粉微粒，研究了短时加压程序和分级长时加压程序下栅格形陷阱对两种微粒的捕获效果。研究结果表明，陷阱对于盆式绝缘子凸侧和三支柱绝缘子附近的微粒都有良好的捕捉效果。试验结束后，部分微粒进入陷阱内部，部分微粒聚集在陷阱边缘。分级长时加压程序下，在试验电压300 kV下持续5 min时，位于腔体内壁的微粒全部被陷阱捕获。而短时加压程序下，当试验电压升至400～664 kV时，微粒才能完全被陷阱捕获。微粒在200～300 kV时运动最为明显，所以在对于1000 kV特高压GIL进行老练试验时，适当延长此加压段的加压时间是有利的。

Abstract

As for the insulation failure in UHV gas insulated transmission line（GIL）caused by metal particles，in this paper a 1000 kV GIL real test prototype is designed and developed. Aluminum and copper powder particles are arranged on the convex side of the insulating spacer and near the three-post insulator. The capture effect of gridshaped traps on the two types of particles under a short-time voltage application procedure and a graded long-time voltage application procedure is studied. The study result shows that the particle traps are effective in capturing particles at the convex side of the insulating spacer and near the three-post insulator. At the end of the test，some particles go inside the trap and some particles aggregate at the edge of the trap. Under the graded long-time voltage application procedure，the test voltage at 300 kV maintains for 5 min，the particles in the inner wall surface of the cavity are captured by the trap. While，under the short-time voltage application procedure，the particles are completely captured by the trap when the test voltage is increased to 400-664 kV.The motion of particles is most obvious at 200-300 kV，so it is beneficial to appropriately extend the voltage application time of this voltage section when perforing aging test for 1000 kV UHV GIL.

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references

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