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[1]陈 晔,叶兆平,郑书生.GIS套管对平面电磁波耦合特性的仿真分析[J].高压电器,2020,56(02):15-20.[doi:10.13296/j.1001-1609.hva.2020.02.003 ]
 CHEN Ye,YE Zhaoping,ZHENG Shusheng.Simulation and Analysis of Coupling Characteristics of GIS Bushing to Plane Electro-magnetic Waves[J].High Voltage Apparatus,2020,56(02):15-20.[doi:10.13296/j.1001-1609.hva.2020.02.003 ]
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GIS套管对平面电磁波耦合特性的仿真分析()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第56卷
期数:
2020年02期
页码:
15-20
栏目:
研究与分析
出版日期:
2020-02-14

文章信息/Info

Title:
Simulation and Analysis of Coupling Characteristics of GIS Bushing to Plane Electro-magnetic Waves
作者:
陈 晔1 叶兆平1 郑书生2
(1. 国网福建省电力有限公司电力科学研究院, 福州 350007; 2. 华北电力大学新能源电力系统国家重点实验室, 北京 102206)
Author(s):
CHEN Ye1 YE Zhaoping1 ZHENG Shusheng2
(1. State Grid Fujian Electric Power Research Institute, Fuzhou 350007, China; 2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China)
关键词:
GIS 套管 局部放电 特高频(UHF) 干扰 极化
Keywords:
GIS bushing partial discharge(PD) ultra-high-frequency(UHF) interference polarization
DOI:
摘要:
变电站放电产生的电磁波进入GIS设备内部,严重干扰了局部放电特高频(ultra-high-frequency,UHF)检测。研究干扰电磁波进入设备的传播特性对于抗干扰技术的提升意义重大,但是目前尚无此方面的研究工作报道。套管是外部电磁波干扰进入设备的主要通道之一,利用时域有限差分方法仿真分析了电磁波经过套管进入GIS设备的传播特性。首先,建立了252 kV套管与GIS腔体仿真模型,在模型侧面设置了平面电磁波源,在GIS内部设置了电场强度点探针;其次,计算了电磁波传播过程中仿真空间内各点的场强及其动态变化,展示了电磁波进入套管与GIS的动态画面;最后,分析了进入GIS内部的电磁波信号的强度、频谱分布特征及其与外部平面电磁波源极化方向的关系。仿真结果表明:套管中心的导杆在电磁波耦合过程中起到了主要作用,当平面波电场方向平行于导杆时GIS内部电磁波干扰信号最强,谐振电磁波的波长大于等于导杆长度的2倍。研究结果对于查找与排除UHF干扰源具有重要的指导意义。
Abstract:
The electro-magnetic waves, which radiated from discharge in the substation, come into GIS instruments and affect partial discharge ultra-high-frequency(UHF)detection badly. The study on the propagation of electro-magnetic waves through the GIS is of great importance for improving Anti-jamming technology. However, there is still no report on this research work. Bushing is one of the main path for electro-magnetic waves going into the GIS. Therefore, the propagation of electro-magnetic wave going through bushing and into GIS is simulated and analyzed by using the method of finite difference in time domain. Firstly, the simulation models of 252 kV bushing and GIS are set up, the plane electro-magnetic wave sources are set on the side of model, and three probes are set in the model to detect the electric field. Secondly, the electric fields at every points in the simulation space during the propagation are calculated and presented as a serious of graph changed along the time. Lastly, the relationships between the amplitude, power spectrum of electro-magnetic wave and the polarizations of plane waves are analyzed. As the results, the conductor rod in the bushing plays the most important role in coupling electro-magnetic wave. When the polarization of plane wave is parallel to the conductor rod, the electro-magnetic wave going into the GIS will be the most strong.The wavelengths of the resonant electro-magnetic wave is equal to or more than twice of the conductor rod length. These conclusions are instructive for finding and eliminating the UHF interferences.

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备注/Memo

备注/Memo:
收稿日期:2019-10-17; 修回日期:2019-12-15基金项目:国网福建省电力有限公司科技项目(52130417000N)。Project Supported by Science and Technology Project of Sate Grid Fujian Electric Power Co.,Ltd.(52130417000N).陈 晔(1988—),男,工程师,工学硕士,从事高压设备带电检测技术研究工作。叶兆平(1984—),男,高级工程师,工学硕士,长期从事变电设备状态检修、诊断工作。郑书生(1979—),男,高级工程师,工学博士,从事高压设备状态监测及绝缘老化状态评估研究。
更新日期/Last Update: 2020-02-14