Low Frequency Acoustic Field Simulation of GIL Disruptive Discharge

TENG Yun; YANG Jinggang; MA Yong; ZHAO Ke; LI Yujie; YAO Yuzhong

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Low Frequency Acoustic Field Simulation of GIL Disruptive Discharge

更新时间：2025-12-08

- Low Frequency Acoustic Field Simulation of GIL Disruptive Discharge
- Vol. 46, Issue 3, Pages: 906-914(2020)
- 作者机构：
  
  1. 国网江苏省电力有限公司电力科学研究院
  2. 2. 上海睿深电子科技有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 March 2020，
  
  Published：2020
- 稿件说明：
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TENG Yun, YANG Jinggang, MA Yong, et al. Low Frequency Acoustic Field Simulation of GIL Disruptive Discharge[J]. 2020, 46(3): 906-914.
DOI：

TENG Yun, YANG Jinggang, MA Yong, et al. Low Frequency Acoustic Field Simulation of GIL Disruptive Discharge[J]. 2020, 46(3): 906-914. DOI：

摘要

针对气体绝缘金属封闭输电线路（GIL）耐压试验过程中击穿放电快速定位的要求

提出运用低频声场进行状态监测和故障定位的方法

为后续对GIL管廊进行声音异响监测、GIL管廊击穿放电定位提供理论依据。根据GIL管廊结构特点

建立有限长GIL管廊声学有限元模型

并设置无限长边界条件

用于模拟无限长GIL管廊中的声场分布。通过声模态分析、稳态频域声场分析、声源及背景噪声分析、瞬态时域声场分析

验证了运用低频声进行击穿放电定位的可行性和必要性。结果表明:击穿声50 Hz以下频率成分幅值要远大于风机噪声频率成分;在40 Hz以下频段

非声模态节点上的声压随距离的增加而减小。

Abstract

To meet the requirements of fast positioning for disruptive discharge in gas-insulated transmission line（GIL） high-voltage holding test

we put forward a method of condition monitoring and fault positioning by using a low frequency sound field

which provides a theoretical basis for subsequent monitoring of abnormal sound and positioning of disruptive discharge in GIL pipe gallery. According to the characteristics of GIL structure

finite element analysis（FEA） model of GIL was established

and the boundary conditions were set up to simulate GIL of infinite length. Sound modal analysis

steady-state frequency-domain analysis

sound source and background noise analysis

transient time domain analysis of acoustic field were researched. It is demonstrated that fault positioning in GIL using low-frequency sound is feasible and necessary. The results show that the frequency amplitude of sound below 50 Hz is much greater than that of fan noise. Below 40 Hz

the sound pressure level（SPL） at non-acoustic modal nodes decreases with distance increasing.

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