Review of Motion and Discharge Characteristics of Wire Metallic Particle in DC GIL

YOU Zhixun; LIU Jing

doi:10.13296/j.1001-1609.hva.2017.10.007

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Review of Motion and Discharge Characteristics of Wire Metallic Particle in DC GIL

更新时间：2025-04-26

- Review of Motion and Discharge Characteristics of Wire Metallic Particle in DC GIL
- High VoltageApparatus Vol. 53, Issue 10, Pages: 36-43(2017)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 西安工程大学
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2017.10.007
  CLC： TM75
- Published：2017
- 稿件说明：
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[1]由志勋,刘静.直流GIL中线形金属微粒运动与放电特性研究综述[J].高压电器,2017,53(10):36-43.

YOU Zhixun, LIU Jing. Review of Motion and Discharge Characteristics of Wire Metallic Particle in DC GIL[J]. High voltageapparatus, 2017, 53(10): 36-43.
[1]由志勋,刘静.直流GIL中线形金属微粒运动与放电特性研究综述[J].高压电器,2017,53(10):36-43. DOI： 10.13296/j.1001-1609.hva.2017.10.007.

YOU Zhixun, LIU Jing. Review of Motion and Discharge Characteristics of Wire Metallic Particle in DC GIL[J]. High voltageapparatus, 2017, 53(10): 36-43. DOI： 10.13296/j.1001-1609.hva.2017.10.007.

摘要

由于直流气体绝缘金属封闭输电线路（GIL）具有传输容量大、电能损耗小、可靠性高和全寿命输电成本合理等优点

因此可在特殊环境下

如高落差、隧道和远距离大容量输电等场合替代架空输电线。而限制直流GIL在输电线路上大规模运用的一个重要原因就是自由金属微粒的干扰

因此有必要掌握自由金属微粒在直流电压下的运动和放电特性。文中总结了国内外关于直流电压下SF6气体中自由线形金属微粒运动与放电特性的研究

以期对工程建设和学术研究起到参考作用。首先介绍了线形金属微粒在直流电压下的受力分析及起跳电压计算模型;然后总结了线形金属微粒在GIL中可能的运动形式

以及当存在轴向不均匀电场时的运动情况;进而分析了线形微粒在直流电压下的电晕放电规律;最后

揭示了线形金属微粒对SF6气体间隙击穿的影响机制。

Abstract

Because the gas-insulated transmission line（GIL）has such advantages as large transmission capacity

small power loss

high reliability and reasonable whole-life transmission cost

it can be utilized to substitute part of overhead line in special environment such as the high drop area

tunnels or connections between new remote generation areas and the load centers.One of the main reasons that restrict the extensive application of DC GIL is the pollution of free metallic particles

therefore it is of great necessity to grasp the motion and discharge characteristics of free metallic particles in GIL.In this paper

previous research on motion and discharge of wire metallic particles are investigated

which could serve as reference for practical engineering and academic research.Firstly

the force analysis and calculation of lift-off voltage of wire metallic particle are introduced.The possible motion patterns of wire metallic particles are summarized and attention is also paid to cases with axial non-uniform electric field.The corona discharge characteristics are analyzed.In addition

the influencing rules of wire particles on the breakdown of SF6 gas gap are revealed.

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