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In recent years, electricity demand has been increasing, whereas conventional or petroleum-derived energy resources which are used for generating electrical power have been decreasing day by day. On the other hand, environmental problems due to petroleum-derived energy resources are another vital issue in the world. Renewable energy resources play a crucial role in less global warming, improving public health and inexhaustible energy. Inverters are one of the main components of renewable resources such as solar cells, wind turbine, fuel cells etc. Power quality is one of the major problems for all power systems. Power quality is getting more complicated by integrating renewable energy systems. For this reason, power quality effects of inverters must be investigated. In this study, different single and three-phase inverter topologies were designed and analyzed. In terms of single-phase four different topologies, in terms of three-phase, three different topologies were modeled. All topologies were investigated for current waveform under varying load conditions and compared in terms of DC injection, total harmonic distortion (THD) and individual harmonics with the help of PSIM and MATLAB Simulink.

Power quality comparison of single-phase and three-phase inverter topologies for renewable energy systems