Passive and Active Anti-Resonance Capacitor Systems for Power Factor Correction

This paper presents passive and active anti-resonance capacitor systems for power factor correction. Normally, shunt capacitors should be designed carefully before installation in order to avoid series and/or parallel harmonic resonance between the capacitors and line/load inductances. To avoid these problems passive systems, such as shunt capacitors, connected in series with reactors can be used. However, the system parameters are dynamically changing, according to the power system configurations and loads. In the last years, new active systems together with capacitors banks have been used to avoid harmonic resonance. In this paper passive and active anti-resonant systems for power factor correction are presented. A new active system will also be presented. Several results are presented showing the effectiveness of the proposed system