These elements are used in drives and other applications to reduce harmonics and commutation voltage dips and increase the reliability of the entire drive system, as well as protection of both devices and the power supply network against the phenomenon of low frequency interference. The quality of feed energy is a topic that plays an increasingly important role in the energy sector, because the energy supplier has a legal order to provide the customer with energy with strictly defined parameters such as harmonic content, voltage amplitude, frequency, etc. To achieve this, it is necessary to limit the interference generated by the various systems to the network, especially those that receive distorted electricity from the network.