POWER QUALITY IMPROVEMENT USING PV AND UPQC

The quality of electrical power plays vital role in
the utility systems and industry. The quality of the power tends
to have a direct economic impact on consumers and suppliers.
Growing consumer demands lead to power quality issues.
Many consumers may experience severe technical and
economic impacts due to power quality problems such as
voltage sag, swell, harmonics and voltage interruptions. In this
paper the main focus is on UPQC, which is a combination of
series and shunt active power filters. The series APF alleviates
voltage based distortions, while shunt APF mitigates current
based distortions. UPQC alleviates the voltage and current
based distortions concurrently as well as independently. UPQC
improves power quality by compensating both harmonics and
load current which thereby makes source current and load
voltage sinusoidal at the required voltage level. The modeling
of series APF, shunt APF and the UPQC has been carried out
using MATLAB/Simulink.