变电站接地网状态检测用虚拟扫频信号发生器

Sweep signal generator based on LabVIEW for detecting substation ground grid state

研究一种基于LabVIEW的变电站接地网状态检测的扫频信号发生器,该扫频信号发生器能产生频率随时间作均匀变化且等幅的正弦信号作为被测网络的测试信号。当等幅扫频信号加于被测网络时,网络的输出幅度将按自身的幅频特性变化。通过系统实时、快捷地测试变电站接地网的参数,根据频率特性实现变电站接地网的状态检测,本文所提出的基于虚拟仪器的腐蚀检测方法具有独创性,目前未见有文献介绍,与虚拟仪器结合的变电站接地网状态检测技术具有很好的应用前景。

Study a sweep signal generator based on the LabVIEW for detecting substation ground grid state, Sweep signal generator to produce frequency change at any time inter-cropping, and the amplitude of the sinusoidal signal measured as a test of the network signal. When the signal amplitude sweep increase in the measured network, the network＇s output rate will increase its amplitude frequency characteristics change. Through this system we can measure the parameters of substation real-timely and rapidly, and gain the amplitude-frequency characteristic and phase-frequency characteristic of the test signal, according to the frequency characteristics to accomplish the breakpoints state dection of substation ground grid. This corrosion detection method which based on LabVIEW we put forward in this paper is unique. At present, there is no paper to introduce. The technique which combined substation fault detection with LabVIEW has a very good application prospect.