Hybrid active power filter based on diode clamped inverter and hysteresis band current controller

In this paper, the development of a practical parallel hybrid power filter consisting of a shunt active power filter and passive filters is presented. This work explores design and analysis of Hybrid Active Power Filter (HAPF) based in p-q instantaneous theory and using hysteresis current band to obtain the gating signals for five-level diode clamped multilevel inverter (DCMLI). The technique used is capable of reducing the Total harmonic distortion drawn by the non-linear load, compensate the reactive power and correct the power factor, therefore, the power quality problem of a distribution system is reduced especially harmonic problems. The simulation results of the systems have been carried out with MATLAB. Also, the PI controller is employed to reduce the ripple voltage of the dc capacitor of the diode clamped inverter. The designed system have been tested the effect of the control approaches for real time current compensation harmonics for steady state condition.