Impact of Hybrid Inverters on Electric Power Quality

The paper describes influence of hybrid inverter operating modes on electric power quality indices. Simulation meodel of electric grid with alternative energy sources, connected to the point of common coupling of electric energy consumers in parallel with power system, was developed. Several operating modes of hybrid invertor were studied with evaluation of power quality indices. Total harmonic distortion characteristic of voltage and current at the output of photovoltaic power station inverter and at the point of common coupling were obtained. The algorithm for selection of methods and means to decrease the influence of hybrid inverters on the network voltage distortion was developed.