Research on UHF Signal Propogation Characteristics of UHV GIS Partial Discharge Based on Insertion Loss Measurement

XU Hui; LIU Mengna; LIU Yi; LIU Zhengyang; XU Limeng; WANG Haotian; LI Junhao

doi:10.13296/j.1001-1609.hva.2025.10.007

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Research on UHF Signal Propogation Characteristics of UHV GIS Partial Discharge Based on Insertion Loss Measurement

Panoramic State Intelligent Perception Technology for Power Equipment | 更新时间：2025-10-21

- Research on UHF Signal Propogation Characteristics of UHV GIS Partial Discharge Based on Insertion Loss Measurement
- High Voltage Apparatus Vol. 61, Issue 10, Pages: 55-61(2025)
- 作者机构：
- 作者简介：
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- DOI：10.13296/j.1001-1609.hva.2025.10.007
  CLC：
- Received：27 March 2025，
  
  Revised：2025-07-02，
  
  Published：16 October 2025
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XU Hui, LIU Mengna, LIU Yi, et al. Research on UHF Signal Propogation Characteristics of UHV GIS Partial Discharge Based on Insertion Loss Measurement[J]. High voltage apparatus, 2025, 61(10): 55-61.
DOI：

XU Hui, LIU Mengna, LIU Yi, et al. Research on UHF Signal Propogation Characteristics of UHV GIS Partial Discharge Based on Insertion Loss Measurement[J]. High voltage apparatus, 2025, 61(10): 55-61. DOI： 10.13296/j.1001-1609.hva.2025.10.007.

摘要

在GIS中内置特高频传感器检测局部放电是一种常规的在线监测手段，其检测可靠性会受到GIS结构与传感器布置的影响。文中采用射频分析仪和内置传感器测试了黄石站1 000 kV GIS直线型、L型和T型结构的插入损耗曲线，并分别计算不同频段下的插入损耗平均值。结果表明，高频段的电磁波插入损耗绝对值相较于低频段降低10%～20%，在该系统中高频电磁波具有更强的辐射能力和耦合能力。GIS中T型结构和L型结构会对信号产生较高的衰减，电磁波经过一个L型结构产生的损耗为39.95 dB；经过一个T型结构产生的损耗为27.45 dB，远大于传播距离带来的损耗。最后，文中利用时域有限差分法对不同结构的GIS进行建模并计算插入损耗，其计算结果与实测数据的平均偏差均小于1%，证实实验方法及结论的可靠性。

Abstract

It is a common online monitoring method to detect partial discharge with built-in ultra-high frequency sensors in GIS. Its detection reliability will be affected by the GIS structure and sensor layout. In this paper

the insertion loss curves of the straight type

L-type and T-type structures of the 1000 kV GIS of Huangshi station are tested by radio frequency analyzer and built-in sensors

and the average insertion loss in different frequency bands is calculated respectively. The results show that the absolute value of the insertion loss of electromagnetic waves in high-frequency band is 10%-20% lower than that in the low-frequency band

indicating that high-frequency electromagnetic waves have stronger radiation and coupling capabilities in this system. The T-type and L-type structures in GIS will produce higher attenuation to the signal. The loss of electromagnetic waves generated through an L-type structure is 39.95 dB；and the loss of electromagnetic waves generated through a T-type structure is 27.45 dB

which are much greater than the loss caused by the propagation distance. Finally

the finite difference time domain method is used in this paper to model GIS with different structures and calculate the insertion loss. The average deviation between the calculated results and the measured data is less than 1%

which confirms the reliability of the experimental method and conclusion.

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references

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