Design of Electronic Power Network Frequency Measurement System Based on LabVIEW Virtual Panel*

Frequency is a standard of electronic power quality, and is important parameter of electronic power system running state. System's frequency reflects active power supply and demand balance's basic state of electronic power system. The frequency fluctuation of an electronic power system is mainly affected by 10s∼3 min pulse sub-component load or continuous sub-component in very slowly changing. So, adopting frequency software tracking method is very necessary. Because virtual instrument technology can largely reduce hardware cost in completing frequency tracking, and add instrument flexibility, This system uses virtual instrument LabVIEW to design a kind of frequency tracking measurement frame diagram procedure, and through system simulation, we prove this method of calculating frequency's accuracy by using virtual instrument technology.