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Comparison of fuzzy logic and proportional integral controller of voltage source active filter compensating current harmonics and power factor

This paper presents and compares the performance of two control techniques namely fuzzy logic FL and proportional integral PI applied to a voltage source inverter operating as an active power filter. The controllers permit to compensate harmonics and reactive power generated by the non-linear load simultaneously. This work is performed in order to make an accurate comparison of fuzzy logic controller and classical control technique such as PI controller. The fuzzy logic controller implemented uses Sugeno method, and is optimized by using adaptive neuro fuzzy inference system ANFIS. Steady state and transient performance are compared for different methods. The obtained results show the fuzzy logic controller is performing much better than the PI controller over a wide operating range.