Modeling harmonic compensation modes of active correction systems

This paper deals with power quality increasing problem in power supply systems of industrial enterprises with intensive spread of nonlinear load, including machine-building enterprises. The usage of shunt active filter as a kind of active correction system for power quality increasing is presented in the paper. The proposed algorithm of harmonic determination and elimination for shunt active filter is described and justified by means of mathematical modeling and computer simulation. A mathematical model of generalized industrial power supply system of machine-building enterprise with nonlinear load was developed within a Matlab Simulink software environment for this purpose. In process of simulation the efficiency of proposed algorithm is shown in different modes of harmonic compensation. The proposed model also can be used for harmonic emission evaluation when choosing proper technical decision for power quality rising.