基于平均有功功率的单相电路谐波和无功电流检测方法

A Harmonics Detection Method Based on Average Power Theory in Single-phase Circuit

为解决电网电压畸变时单相电路谐波和无功电流检测问题,本文提出了基于平均有功功率的单相电路谐波和无功电流检测方法。理论分析和仿真验证表明,该方法能够实时检测出单相电路瞬时无功电流、基波无功电流及谐波电流,并且在只检测瞬时无功电流时无需锁相环电路。与基于瞬时无功功率理论的检测方法及有功电流分离法相比,该检测方法概念更清晰、算法更简单、更容易实现。

In order to meet the demand of detecting harmonics and reactive currents when the voltage distortion,a detecting method based on average active power definition is drawn in this paper.Testified through analysis and simulation,this method is proved to detect instantaneous reactive currents,fundamental reactive current and harmonics in single-phase circuit,and without PLL in the detection of only instantaneous reactive currents.Compared with other methods based on the theory of instantaneous reactive power,this method is simpler and easier.