Improving Energy Efficiency through Elec

This paper presents some results proving that a compensation unit (an active power filter controlled by a core soft modified by the author) capable to balance the three-phase currents is also able to achieve the compensation of the reactive power from the three-phase grid. The three-phased systems have been designed for direct symmetrical sinusoidal operation, but any unbalanced three-phase load connected to the system leads to a non-symmetrical operation, that can be considered a superposition of an inverse and a homopolar symmetrical operation on the direct symmetrical operation. For each of these three operations, the active and reactive powers are separately conservative. Some of the disadvantages of the unbalanced operations is that the flow of non-symmetrical powers produces supplementary losses in the electric power systems and reduces their efficiency. The compensation of the unbalanced utility currents is performed at a frequency of 10.800 Hz. The paper describes the necessary operations of the compensation unit at every 1/10.800 seconds in order to switch the power from a phase to the others.