Design Of Power Quality Monitoring Management System Based On LabVIEW

The development of national economy and the continuous rising of the people's living standard is proposing more demands on electric power as well as higher requirements on power quality (PQ). Real-time accurate power quality measurement is essential to electrical equipment safe operation overall national economy quality, convenience of the residents. Because the power parameters are time-varying and distributed, it is necessary to measure the power parameters instantanesity at different positions on the power transmission line. Only in the way, can we get the PQ's paramenters, which is a clue to find the source of power harmonics and assist relevant authorities to improve the power quality.Conventional power quality monitoring system is always large , high price, with long debug cycle and single function, which is unable to meet requirements of increasingly complex, real-time multi-parameter testing. In this thesis, by studying the power quality's technical indicators, measurement and analysis, a power quality monitoring system based on virtual instrument is proposed and designed to solve these problems. This thesis adopts high-precision 16-bit PCI 6024E data acquisition card to collect the power quality parameters at different positions in the power line. And LabVIEW software is used to analyze voltage deviation, frequency deviation, harmonics, three phase unbalance, voltage fluctuation, flicker and many other power parameters. Windows Access database is used to store the analysis results and realize data query as well as data management. With LabVIEW Web Sever technology, remote monitoring of power network is realized.In this thesis, power quality monitoring system is studied. The monitoring interface is friendly and intuitive, with advantages of real-time scalability and so on. According to actual conditions, the system can be applied to different occasions, which significantly improves the degree of power quality automatic testing.