THREE PHASE ACTIVE POWER FILTER BASED ON NEURAL NETWORK OF CURRENT CONTROLLED VOLTAGE SOURCE INVERTER

Document Type : Original Article

Authors

1 Electrical Engineering Departement, Faculty of Engineering University Shebin El-Kom, Egypt.

2 International Steel Rolling Mill (ISRM), Sadat, Egypt.

Abstract

This paper presents a shunt active power filter to compensate reactive power and
reduce the unwanted harmonics in the supply current. A shunt active filter is
realized employing three-phase IGBT bridge based voltage source inverter (VSI)
with common DC bus capacitor. Two different proposed control methods for
determining the reference compensating currents of the three-phase shunt active
power filters based on proportional- integral (PI) controller and Artificial Neural
Nepork (ANN) are presented. Current controller based on hysteresis current
horitroller is used to generate the firing pulses of VSI inverter. The shunt active
filter acts as a current source, which is connected in parallel with a nonlinear load
and controlled to generate the required compensation currents. The proposed
system is implemented using a high speed Digital Signal Processor (DSP).
Experimental and simulation results with different nonlinear loads are presented to
conform the validity of the proposed control strategies.