Abstract-- Power Quality issues are becoming a major concern of
today's power system engineers. Harmonics play significant roll
in deteriorating power quality, called harmonic distortion.
Harmonic distortion in electric distribution system is increasingly
growing due to the widespread use of nonlinear loads. Large
considerations of these loads have the potential to raise harmonic
voltage and currents in an electrical distribution system to
unacceptable high levels that can adversely affect the system.
IEEE standards have defined limits for harmonic voltages and
harmonic currents. Active power filters have been considered a
potential candidate to bring these harmonic distortions within the
IEEE limits. This paper deals with an active power filter (APF)
based on simple control. A voltage source inverter with pulse
width modulation (PWM) is employed to form the APF. A diode
rectifier feeding capacitive-resistive load is considered as
nonlinear load on ac mains for the elimination of harmonics by
the proposed APF. MATLAB model of the scheme is simulated
and obtained results are studied.