Power Definition for Three-Phase Unbalanced Power System Based on Tan-Sun Coordinate Transformation System

This paper reviews the definition methods of active and reactive powers for three-phase power system, and proposes a new power definition method based on Tan-Sun coordinate transformation system, where the parameters in the power definition formulas can all be acquired in real time, so as to improve the accuracy and response speed of power calculation for three-phase unbalanced power system.