Fuzzy controlled active filter driven by an innovative current reference for cost reduction

The aim of this work is to minimize the active power filters prime and operating costs by the means of a new current reference. Such a current reference is able to share the responsibilities in power quality deterioration between supply and customer, making the filter to deliver a current with a lower harmonic content, which means a lower power delivered and a lower switching frequency. The use of fuzzy logic may be helpful to achieve a good current control since this approach allows a control action to be carried out independent of electrical parameters. Fuzzy control has been designed in order to have different direct actions in each critical point of reference waveform using the nonlinear input-output mapping.