摘要
作为新型的接地网缺陷诊断方法,瞬变电磁法可以为地网状态检测和故障诊断提供无损检测。运行中的电网存在较强的电磁噪声,对瞬变电磁信号形成干扰,降低了探测信号的可靠性。本文针对电网电磁噪声的特点,提出叠加采样法抑制工频高次谐波噪声的解决方案,并依据瞬变电磁信号的采样特点改进了传统叠加采样法,提高了方法对工频谐波的抑噪能力,实验验证了本文所提方案的噪声抑制效果。
Transient electromagnetic methods can provide predictions and assessments for shallow geological hazards that compromise transmission projects. The electromagnetic noise of the power network causes interference to the transient electromagnetic signal, which reduces the reliability of the detection signal. In this paper, according to the characteristics of electromagnetic noise in the power grid, a solution is proposed to suppress the power frequency noise by using the superposition sampling method. According to the sampling characteristics of transient electromagnetic signals, the traditional superposition sampling method is improved and the noise suppression capability of the method is improved. The experiment proves the noise suppression effect of the proposed scheme.
出处
《电气工程》
2020年第3期83-90,共8页
Journal of Electrical Engineering
关键词
瞬变电磁
工频干扰
叠加采样
降噪
Transient Electromagnetic
Frequency Interference
Superimposed on Sampling
Noise Reduction
