PASSIVE FILTER OF TUNING POWER SIMULTANEOUSLY AT TWO FREQUENCIES, ONE FOR HOMOPOLAR COMPONENTS AND ANOTHER FOR DIRECT.

摘要

Passive power filter tunable simultaneously at two frequencies, one for homopolar components and one for direct. The present invention consists of a three-phase passive LC power filter, which by the special arrangement of the magnetic circuit that forms the inductance, has two resonance frequencies simultaneous with the three-phase capacitor bank. One of said resonance frequencies is for homopolar sequence voltage and current components, and the other resonance frequency for direct and reverse sequence components. Being able to adjust in the design of the coils and magnetic circuit the value of these frequencies and the relationship between them. This ensures that the device working as a harmonic absorption filter on the three-phase network absorbs currents of 2 simultaneous frequencies. Also in combination with an active filter, it can form a hybrid filter that eliminates unwanted homopolar harmonics and direct or inverse sequence from the network.