基于虚拟仪器和小波降噪原理的电力故障分析装置设计

Design of electric power faulted signal analyzing device based on virtual instrumentation technology and wavelet denoise

提出了一种由工控机和虚拟仪器技术实现的电力系统故障信号降噪与分析装置的设计方案,在软件设计中,把小波降噪和虚拟仪器技术相结合。主要通过设置对采样率和采样通道来完成信号的采集,并且在故障录波时采用多种启动方式,使得系统更加灵活,然后再利用软硬阀值结合的方法对电力系统故障信号进行有效的降噪,提高了电力系统故障类型判断和故障定位的准确度,最后通过自动生成报表的形式来显示所有功能。

This paper introduces a scheme for realizing electric power faulted signal noise reduction and analysis based on industrial controlling computer and virtual instrument.The wavelet noise reduction and virtual instrument technology are combined in terms of software design.It primarily sets the sampling rate and sampling channels to complete the signal acquisition.And in fault recorder,it uses a variety of start ways,which can make the system flexible.The effective noise reduction is achieved by combining soft and hard threshold,so as to improve the accuracy of fault determination and fault location.Finaly,it uses the automatically generated reports to show all the function.