This paper presents a study and solution of different power quality issues of Jaipur Metro Rail Corporation (JMRC) power supply system. The measurement of different parameters was taken at 132kv incoming feeder of Jaipur Metro Receiving Sub Station. The measured data were analyzed and different power quality issues like excess reactive power; current harmonics and load unbalancing were observed. These power quality issues makes power factor poor. A solution of these power quality issues using Active Harmonics Filter has been proposed.

Keywords : Power Quality, Harmonics, Load unbalancing, Reactive Power, Power Factor, Active Harmonics filter, Non Linear Loads, Total harmonics Distortion (THD).