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In recent years, the power quality problems gradually attracted people's attention. One hand, with the increasing of the power system, power system rectifier , impact and non-linear loads such as an increasing number , the existence of these nonlinear loads , often leading to the power grid voltage distortion , voltage fluctuations , voltage flicker and phase imbalance of power quality problems , resulting in reduced quality of power supply , and even deterioration of the grid operating conditions ; on the other hand , with a variety of complex , precision , power quality sensitive electrical equipment to the growing popularity of electricity consumers of power the quality put forward higher requirements. Power quality monitoring and management , become a hot research at home and abroad to provide quality power to the power user . According to the development needs of the power industry , the paper developed a mixed-signal system MCU C8051F064 chip - based power quality monitoring device . The paper introduces the research status and development trend of domestic and international power quality , and power quality national standards are explained in detail . Summarizes the various types of power quality measurement principle and method of calculation , which in-depth study of the power system harmonic measurement theory methods ; Secondly, in the analysis of power quality measurement method and its implementation on the basis of platform , the paper put forward based on C8051F064 chip power quality monitoring solutions in order to achieve the parameters of three-phase voltage , current, power , frequency , harmonic measurement , design -based the C8051F064 chip power quality online monitoring device hardware systems , with an emphasis on the signal conditioning AD sampling frequency measurement module and human-computer interaction module circuit design ; Finally, the paper developed a software system for power quality monitoring device , the focus of the FFT algorithm and its implementation . The C8051F064 chip - based power quality monitoring devices with good reliability , high accuracy , wide application and low cost , effectively improve the power quality monitoring system flexibility and scalability .
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