Single-Phase Shunt Hybrid Active Power Filter Based on ANN

In this paper, a single-phase shunt hybrid active power filter (APF) is presented to compensate reactive power and eliminate harmonics in power system. The hybrid active filter consists of one active filter and one passive filter connected in series. By controlling the equivalent output voltage of active filter, the harmonic currents generated by the nonlinear load are blocked and flowed into the passive filter. Sensing load current, dc bus voltage, dc bus reference voltage and source voltage compute reference voltage of APF through modified adaptive artificial neural network (ANN). And a voltage controller is used to generate the firing pulses of the voltage source inverter. The proposed system is implemented using Digital Signal Processor (DSP). Simulating results are presented to confirm the validity of the scheme.