Harmonics Modeling andHarmonic Activity Analysis ofEquipments withSwitch Mode PowerSupply using MATLAB andSimulink

lowpowersingle-phase nonlinear loadmay notposemany * increased powerlosses serious harmonic problems butlarge concentrations ofthese loads havethepotential toraise harmonic voltages and * Errors inpowermeterig currents tounacceptable levels andharmonic current * Inadvertent thermaltripping of relays, circuit "pollution" isaoneofthemajorpowerquality problem in breakers andprotective devices [3]-[4]. electrical powersystems. Inthisstudy, nonlinear resistance andharmonic models oftheequipments withswitch mode Terminal equations ofelectronic loads cannot bewritten powersupply (SMPS)arecarried outusingMATLABg.informofv=Riori=Gvbecause oftheir switch mode Afterwards, Simulinko single-phase and three-phase powersupplies. However, nonlinear characteristics of simulations aredeveloped forbothphaseandneutralnonlinear loads canbedescribed asfollows: harmonicactivity analysis. The symmetrical components theoryisimplemented underbalancednonsinusoidal F(i,v)=O