|Divya Prabha||Lalit Jain|
|Department of EX, OCT, Bhopal||Department of EX, OCT, Bhopal|
ABSTRACT: Power system comprises of three natural / physical characteristics namely voltage, current and frequency. Deviation in these physical characteristics are termed as power quality issues in power system. Presence of nonlinear current or nonlinear/unbalanced voltages and frequencies are termed as power quality issue. These (current, voltage and frequencies) deviations result in failure/damage of equipment in power system. Power electronic converters associated with their nonlinear switching characteristics and high frequency operation are the major cause for power quality issues. In order to reduce harmonics and improve power quality, Hybrid Active Power Filter (HAPF) or shunt HAPF can be employed. The power improvement can be done using various algorithm like RLS algorithm, DC link voltage controller, fuzzy logic based hybrid filter.
Keywords: RLS algorithm, Hybrid Active Power Filter, PWM.