Application of Fractional Order $PI^{\lambda}D^{\mu}$ Controller for Power Quality Improvement Under Non-Stationary Load Conditions

A non-stationary load has a huge impact on power quality in electrical power distribution system. To maintain the level of power quality, the control algorithm should have capability of rejecting the disturbances. The controller plays a vital role in minimizing the error for the generation of reference current. This paper presents the application of fractional order $PI^{\lambda}D^{\mu}$ controller for power quality improvement in electric power distribution system. Genetic algorithm is used for tuning the control parameters of fractional order $PI^{\lambda}D^{\mu}$ controller. The performance of controller is tested using non-stationary load conditions. To validate the effectiveness of fractional $PI^{\lambda}D^{\mu}$ controller, its dynamic response, Total Harmonic Distortion (THD), complexity and design parameters are compared with integer based controller and fuzzy logic controller. The study has been done in real time simulation environment.