| Abstract |
This paper presents a Single-Phase Active Conditioner, which primal function is regulate load voltage,thus protecting the most sensitive loads from sags, swells, flicker and voltage harmonics. It isconstituted by two back-to-back H-bridge converters. One regulates load voltage, the other DC-linkvoltage. This paper will focus essentially on the active power flow during sag and swell events, in aharmonic free Electrical System. It is shown that, ideally, during a sag or swell event, the active powerconsumed from the AC mains, is the same that is delivered to the load. It also shows how this is achieved, by analyzing the working principle of the Single-Phase Series Active Converter, and, particularly, the crucial action of the DC link capacitor. The control strategy of the proposed custompower device is also presented in a brief form, for contextualization with the operating principle forthe compensation of voltage variation events. Simulation results are presented, showing transient andsteady state waveforms of the Single-phase Series Active Conditioner with a purely resistive load. The controller of Series Active Conditioner was implemented on a TMS320F2812F from TexasInstruments. Experimental results are also presented, and for better understanding of the active powerflow in the Single-Phase Series Active Conditioner, the implemented electrical system has only a resistive load. |
