A System to Control Power Currents of Ineffective Instantaneous Power Compensation

摘要

The goal of increasing the energy efficiency of three-phase ac systems is to reduce or completely exclude losses caused by inactive electric-energy fluxes. This can be achieved by practical use of active power filters that make it possible to eliminate distortions in the harmonic form of signals, to suppress high-frequency harmonics, to perform balancing of phase quantities, to reduce voltage jumps, to damp resonance effects, etc. The main propositions of a new approach to formation of compensatory effects at the output of the given type of semiconductor converters are set forth. The approach is based on dividing phase currents of arbitrary form into active and reactive components with the use of a hypercomplex space. The experimental study results show that the developed compensation algorithms ensure a unified or leading power factor with a harmonic form of consumed currents in the case of clearly pronounced unbalance and nonlinearity of load circuits, which allows practical implementation of highly efficient power-saving three-phase systems of electric-energy transmission, distribution, and conversion.