Mini-DVR-dynamic voltage restorer with functions of reactive compensation and active harmonic filter

The electric engineering development has provided a more intense use of today´s equipment with greater efficiency. But, often, such equipment cause distortions in the network´s voltage and current waveforms and also it is sensitive to fluctuations of the network itself. Active filters constitute a feasible technological option for the mitigation of distortions and fluctuations, so as to improve the quality of energy and the development of mitigating technologies for harmonic distortions, through series and shunt voltage sources created by power electronics devices (DVR-dynamic voltage restorer). This project has been developed a mini-DVR prototype to: firstly, recompose the voltage transients present and operate as a voltage active filter, and secondly, act also compensating part of the reactive load, in this way, improving the voltage control. This device is in its final test phase at the EPUSP laboratory with the transient re-composition function (sag/swell and voltage harmonics).