湖南电力 ›› 2022, Vol. 42 ›› Issue (2): 17-24.doi: 10.3969/j.issn.1008-0198.2022.02.004

• 研究与试验 • 上一篇    下一篇

变压器噪声抗环境干扰检测方法对比与效果分析

张明海1, 杨春信2, 吴晓文3   

  1. 1.湘西土家族苗族自治州生态环境局,湖南 吉首 416000;
    2.湘西土家族苗族自治州永顺生态环境监测站,湖南 永顺 416700;
    3.湖南科技大学,湖南 湘潭 411201
  • 收稿日期:2022-01-24 发布日期:2025-08-05

Comparison and Effect Analysis of Anti-Environmental Interference Methodologies for Transformer Noise Test

ZHANG Minghai1, YANG Chunxin2, WU Xiaowen3   

  1. 1. Xiangxi Tujia and Miao Autonomous Prefecture Ecological Environment Bureau, Jishou 416000, China;
    2. Yongshun Ecological Environment Station of Xiangxi Tujia and Miao Autonomous Prefecture, Yongshun 416700, China;
    3. Hunan University of Science and Technology, Xiangtan 411201, China
  • Received:2022-01-24 Published:2025-08-05

摘要: 针对变压器噪声信号检测易受到外界环境干扰的问题,在分析变压器周边虫鸣、鸟鸣、蛙鸣、车辆典型噪声时频域特性的基础上,提出了小波包-谱减法、短时窗法以及滤波器法3种抗干扰检测方法,对比分析了不同信噪比条件下3种方法对于虫鸣、鸟鸣、蛙鸣、车辆噪声干扰的抑制效果,通过现场实测验证了算法有效性,最后对实际应用过程中的算法选择方法进行探讨。结果表明,对于不同干扰源,小波包-谱减法与滤波器法均能取得较好的抑制效果,性能普遍优于短时窗法,但针对突发间歇性环境干扰,小波包-谱减法具有更好的普遍适用性,具体使用过程中应根据实际需求选择最佳的抗干扰检测方法。研究成果对于提高复杂环境干扰条件下电力变压器噪声测量精度具有重要参考意义。

关键词: 变压器噪声, 环境干扰, 谱减法, 时间窗, 滤波器设计

Abstract: Transformer test result is commonly influenced by its surrounding environmental interference. Based on the characteristics analysis of insect, bird, frog and automobile noises, three anti-interference methodologies are proposed in this paper, which are wavelet packet-spectral subtraction, short-time frame and filter design, respectively. Under the influence of insect, bird, frog and automobile noises with different signal-noise ratios, the anti-interference effects of the three methods are compared. Field test is conducted to verify the proposed methods. Finally, the application principle of the anti-interference methods is discussed. The result shows that wavelet packet-spectral subtraction and filter design methods will achieve better result than short-time frame method for different environmental interference types. However, better general applicability is found about the wavelet packet-spectral subtraction method for burst intermittent interference. In the field application process, proper method should be chosen according to actual demand. The result will provide critical reference for transformer noise test accuracy enhancement under complex environmental interference condition.

Key words: transformer noise, environmental interference, spectral subtraction, time frame, filter design

中图分类号: