| Abstract |
An active power filter should be dimensioned in consideration of the type of nonlinear load it has to filter. When the load is a thyristor rectifier, the performance of the active filter can be evaluated in the semiconductor switching processes. That is, the currents that the active filter applies are often unable to follow the reference currents during the switching. This becomes all the more critical as the triggering delay angle increases, because the switched currents vary even faster. This article presents a theoretical discussion of the relations between the parameters of the active filter and those of the non-linear load (thyristor rectifier), to obtain the optimum dynamic. The conclusions are then applied to a numerical simulation of an active filter with 150 KVA voltage structure used for compensating the harmonics generated by a 400 KVA rectifier. Finally, we present the experimental results obtained from a low-power single-phase model. |
