Aplicação de filtro ativo de potência série para controle do fluxo de potência.

Abstract

The present work deals with the application of a typical Active Series Power Filter structure for voltage compensation and for active power flow control in resistive and inductive loads. The studied Active Power Filter has an external voltage source, connected to the DC bus, which is capable of supplying and absorbing energy, so that it can be used in power management applications. The system's permanent regime model is developed and analyzed, verifying that the active power of the compensator influences the characteristic curve Vlx0g, implying singularities in the system's operation. By means of the contour conditions considered, the open-loop control equations are obtained, with limiting operating conditions in terms of active power being processed by the compensator. A closed-loop control strategy is presented, using modified PI-type controllers or synchronous PI for voltage control. In order to verify the simulation results, the Active Filter Series studied is implemented in the experimental platform constituted by the dDSPACE and inverter bench in the laboratory. The tests carried out consider conditions of sinking / overvoltage in the network and supply / absorption of power by the compensator for purely resistive load and strongly inductive. In all cases, the results show that the load voltage is set at the nominal value with a total harmonic distortion rate of less than 4% and the average value of the desired active reference power.