| Electric power is one of the main forms of energy in the production and life of modern human society. With the wide application of power electronic equipment,these devices consume a lot of energy, and at the same time, the requirements of power quality are higher and higher, the influence of power quality is not only a work efficiency, poor power quality and even damage the equipment. In the power system, the monitoring of voltage and frequency deviation, voltage fluctuation and other electric right indexes, analyzes its influence on the work state of electrical equipment and power system, the power supply equipment in time to protect and improve the quality of power supply, has the vital significance.This article expatiates on the power quality problems of the development of history and the present situation at home and abroad, explains the definition of power quality indicators and analysis methods, in view of the current market for the status quo of product testing analyzer one-time field.In this paper, a power quality monitoring and analysis system is designed and implemented. The hardware and software design of the power quality monitoring data acquisition board, the power quality monitoring and analysis system is described in detail. The power quality monitoring data acquisition board hardware circuit includes a relay control circuit,transformer circuit, signal conditioning circuit, analog-to-digital conversion circuit and a microcontroller circuit, the software developed by RealView MDK power LabVIEW development environment; development of virtual instrument software using NI quality monitoring and analysis system, with the development of fast,flexible and efficient the advantage of.Finally completed in the system hardware and software development on the functional testing, the system meets the basic requirements for energy measurement and analysis of the quality index of electricity, has good stability and accuracy, and has a certain practical value. |
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