Design and Implementation of Data Acquisition Module in Power Quality Detecting System

According to the need of practical application of high-precision power quality monitoring devices,the impact of front-end signal,by AC sampling in software and hardware synchronous sampling of accuracy was analyzed and compared. A data acquisition module by using hardware synchronous sampling techniques was designed.A design of data acquisition module circuit to meet the practical application of power quality monitoring device on the front-end signal accuracy based on ADI's AD7656 was given.The module had been used in the actual monitoring devices and had a good performance.