Analysis of repetitive-based controllers for selective harmonic compensation in active power filters

This paper realizes an exhaustive analysis and comparative study about the different existing techniques up to now in order to develop repetitive-based controllers applied to selective harmonic compensation in shunt active power filters. Starting from the generic repetitive controller, the advantages and drawbacks of the different versions that have arisen from the original model are compared. The paper also explains the importance of having a correct and accurate model of the plant in order to ensure stability and good performance of the entire system, justifying the method used to carry out the design of such model. The response of different controllers is compared in presence of disturbances, variations in the nominal value of the plant parameters and the computational load.