Interharmonic modeling and simulation via the flexible extended harmonic domain

The growing use of electronic switching devices in both power systems and distributed networks, has become a major issue due to the produced harmonic and interharmonic distortion that adversely affects the network. This paper extends a recently introduced harmonic domain modeling technique, i.e., flexible extended harmonic domain (FEHD), to include interharmonics and/or supraharmonics for both steady-state and transient simulations.Two case studies, one involving a boost converter in open-loop operation and the other involving a three-phase photovoltaic system in closed-loop operation, are presented to validate the proposed approach. The results provided by the proposed approach are verified with those given by the Power System Computer-Aided Design/Electromagnetic Transients Including Direct Current (PSCAD/EMTDC) software tool.