A novel simple prediction based current reference generation method for an active power filter

This paper presents a novel current reference generation method for an active power filter. The method is simple and it uses data collected in previous periods to generate a current reference prediction. This is used as a reference at the stationary operating point of the load. Because in transient state the prediction no longer holds true, a computational control delay compensation method is used instead. Changing the algorithm according to the operating point guarantees effective harmonic compensation both in stationary and dynamic state. In this paper the proposed reference generation technique is applied to the control of a voltage source shunt active power filter. The system performance and efficiency are examined through measurements.