Dynamic Harmonic Mitigation and power factor correction

Dynamic loads are common in several industrial applications such as motors, welders, elevator, rock crushers car crushers, etc. Most of the motors for these applications use AC/DC rectifiers or VFDs in order to realize the desired efficiency or precise control of motor speed. The use of these elements produces harmonic distortion in the current and voltage waveforms, as well as lagging PF. Due to the dynamic (rapid variation) condition of the loads, kVA demand result in the necessity for large system capacity (generation included) and fast response, although the complete kVA capacity is only used to supply the peak reactive power demands. This article analyzes and demonstrates a case study for an electrical system of petroleum pumping sea platform, involving harmonic mitigation, PF correction and notch reduction with a dynamic solution.