Active filter analysis by the harmonic impedance compensation method II: performance analysis

This article presents the results of a study on the performance of active filters (series, shunt and shunt-series) equipped with different control strategies (IRPT, SRF, Fourier, Notch etc.) known from scientific literature. The first article discussed the principal topologies of hybrid active filters, presented a summary of the principal work realised in the domain of active filters, and discussed the harmonic impedance compensation method (HIC). In this paper, the authors include the method of compensation by gain constant, like that of HIC, as one of the four methods for controlling hybrid active filter installations. These installations are modelled and simulated in the PSB/Matlab environment with the aim of studying their performance for filtering harmonics. The number of simulations realised proves that each of the three strategies of control (Fourier, Notch and SRF) associated with the method of HIC present a new harmonic filtering much more significant than each of those associated with the CGC method. In conclusion, the results of this study demonstrate the good performances of all the control strategies associated with the HIC method, except that of IRPT.