基于虚拟仪器的煤矿电网谐波监测系统设计

Design of Harmonic Monitoring System of Coal Mine Grid Based on Virtual Instrument

针对以硬件为核心的煤矿电网谐波监测系统存在更改、升级时间长,成本高的问题,提出了一种以软件为核心的基于虚拟仪器的煤矿电网谐波监测系统的设计方案;分析了该系统的工作原理及硬件结构,详细介绍了基于小波变换和傅里叶变换相结合的谐波测量方法的实现,并给出了该系统的软件设计。仿真结果表明,该系统能很好地满足现代煤矿电网谐波监测的要求。

In view of the problems of long time of modifying and updating and high cost existed in harmonic monitoring systems of coal mine grid which take hardware as core,the paper proposed a design scheme of harmonic monitoring system of coal mine grid based on virtual instrument which takes software as core.It analyzed working principle and hardware structure of the system,introduced implementation of harmonic measurement method based on wavelet transform and FFT transform in details,and gave software design of the system.The simulation result showed that the system can meet with demands of harmonic monitoring of modern coal mine grid well.