Interval type-2 fuzzy control of shunt active power filter

Abstract EN

This paper proposes a new adaptive control technique for shunt active power filter (SAPF) by applying the interval type-2 fuzzy controller (IT2FC) in the DC voltage outer loop.

This adaptive method achieved the main control objectives and compensated the active filter parameters uncertainties besides the unbalanced loads compensation without neutral wire.

The interval type-2 fuzzy controller (IT2FC) offers flexibility and compensates the uncertainties within large ranges due to its footprint of uncertainty.

The IT2 fuzzy controller proved flexibility and faster DC voltage transient response than the PI and type-1 fuzzy controllers due to its type-2 membership functions which describe uncertainties in contrast to the type-1 membership functions which describe vagueness.

Simulation results proved that the IT2 fuzzy controller has faster response and robust performance against parameters variations and unbalanced loads compared to PI and type-1 fuzzy controllers.