Design of high precision power quality testing precision calibrator

Power quality test equipment is the standard test equipment for power quality test, and its test accuracy is very important for power quality analysis and evaluation. In this paper, aiming at the periodic detection of power quality testing equipment, a detection scheme based on online mode is proposed. Aiming at the high-precision problems that need to be solved in the test process, a solution that comprehensively considers the measurement, filtering and sampling rate is proposed. Aiming at the time synchronization problem, a timing method based on (Simple Network Time Protocal) SNTP broadcast is proposed. Finally, the voltage fluctuation to the measurement accuracy is analyzed.