Abstract
This paper proposes a control algorithm to compensate current harmonics and reactive power simultaneously in series active power filters combined with passive shunt filters. Imposing load current to have the same level of distortion as the source voltage for harmonics compensation and to its phase for reactive power compensation is performed. Approximately unity power factor can be attained without using PLL block. Reference voltage for PWM converter is calculated by estimated load current in three-phase system on the contrary to other control methods of series APFs in which two-axes estimation have been performed. This method is less time consuming and can donate reactive power compensation. Simulation results are presented in two different algorithms: harmonics compensation only and simultaneous harmonics and reactive power compensation.
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