Design of Power Quality Online Monitoring Equipment Based on MCU

This paper introduced the design and development of an online power quality monitoring equipment based on MCU.The principle of composition principle was described on both the hardware and measurement algorithms.On the hardware,the equipment adopted the fully integrated mixed-signal system-on-a-chip MCU C8051F064 as the digital central processing unit.The system was composed of CPU unit,analog acquisition unit,keyboard display unit and power source unit.On the software,based on analysis of principle and measurement algorithms of power quality,appropriate algorithms for power quality online monitoring equipment were presented.The equipment has a function of harmonic source location.The online power quality monitoring equipment has good real-time feature and high precision.