Study of active-power-filter simulation based on three-phase instantaneous power theory

Harmonic detection algorithm is very important to the research of APF as it will impact the effect of active power filter harmonic detection and compensation directly.A harmonic detection algorithm based on instantaneous-preactive-power theory is discussed,and a three-phase harmonic detection model which is established with MATLAB/Simulink software is also proposed.Combining with hysteresis comparison controlling system,an active-powerfilter simulation model is established,and the harmonic tracing,detecting and compensating effect is tested.The result shows that the algorithm is effective and the APF model based on this algorithm could compensate harmonic very well.