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A reactive power compensator implemented with three single phase NPC converters is presented and analyzed in this paper. The proposed topology, compared with the conventional three-phase NPC topology, presents the advantages of increasing the number of levels at the output line to line voltages with an independent control in each phase, suitable for unbalanced current compensation. Two independent...
As a compromise between economy and good performance, this paper adopts the combined system using active power filter (APF) and static var compensator (SVC) to compensate reactive power and harmonic currents simultaneously. The SVC is constructed by fixed capacitor (FC) and thyristor controlled reactor (TCR), and the APF is constructed by a voltage source converter and its filter reactor. SVC acts...
Since most loads in electrical distribution systems are inductive, power factor correction through the application of capacitors is the natural choice. However, the capacitor installation can create additional problems, because of harmonic pollution and natural resonance. To avoid these problems, this paper proposes a new anti-resonance active system for power capacitors. The proposed active system...
This paper proposes an improved type of the hybrid-parallel power-factor-correction (HP-PFC) converter. It has the advantage of a higher efficiency and improved input current waveform. This advantage achieved through changing new charging path of the bulk capacitor and balancing the power flow from the two transformers to the output. This new circuit has been analyzed using MATLAB/Simulink and confirmed...
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