功率谱减法对局部放电去噪效果的评价

Low Chen Yong, W. Raymond, K. Mei
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引用次数: 0

摘要

局部放电(Partial discharge, PD)测量被广泛用于绝缘质量状况的评估。在线PD监测的主要障碍是如何从周围环境产生的过多噪声中提取PD信号。小波去噪技术是解决这一问题的一个活跃的研究领域。本文研究了功率谱减噪(PSSD)作为PD去噪工具的可行性。在性能测试中,利用模拟噪声对模拟PD信号进行污染,以模拟现场测量的真实PD信号。实验结果表明,与几种不同的小波去噪方法相比,PSSD能够获得更高的信噪比和更小的均方误差。
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Evaluation of Partial Discharge Denoising using Power Spectral Subtraction
Partial discharge (PD) measurement is widely adopted to estimate the condition of insulation quality. The main hurdle in the monitoring of online PD is the extraction of PD signal from excessive noise originating from the surrounding environment. There is an active research field to tackle this problem and the trend gravitates towards using wavelet denoising techniques. In this work, the feasibility of power spectral subtraction denoising (PSSD) as a PD denoising tool was investigated. In the performance test, simulated noise was used to contaminate the simulated PD signals to emulate real PD signals measured in the field. The denoising test results showed that PSSD is able to achieve higher signal to noise ratio and lower mean square error compared to several variant of wavelet denoising methods.
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