Sliding mode control of current-source active power filter with control delay compensation

This paper presents the use of sliding mode control with a current-source active power filter. From the analysis of the system model, a suitable sliding control function is proposed and its implementation on a DSP-based controller is discussed. A new switching control strategy for the active filter converter with sliding mode control is also proposed. In addition, the effect of control delay on the system response is discussed and a simple measure to compensate this delay is presented. Simulation results show the validity the proposed approach.