Control of multilevel-inverters for active power filters using a fuzzy space-vector method

Nonlinear loads have destructive effects in power systems. Active filters have been used as a solution to this problem. The main prohibitive factor in this method is the cost of high-speed and high-current switching devices. In this paper, by proposing a new formula, it is shown that using multilevel inverters in active power filters can decrease the switching frequency while sustaining the same specific performance. A fuzzy space-vector method is also developed for controlling a three-phase multilevel active filter. The simulation results confirm the suitable performance of the filter using this control method.