Power quality enhancement in a distribution network using PSO assisted Kalman filter — Based shunt active power filter

The increased usage of non-linear loads in the distribution system network imposes the need of power quality enhancement in the distribution side. In this regards, a Kalman filter (KF) based proportional integral (PI) current control strategy for controlling the shunt active power filter (SAPF) is proposed in this paper. To achieve accuracy in the KF performance, Particle Swarm Optimization (PSO) algorithm is adopted for tuning parameters. The KF estimates the source reference current quickly and adaptively. So, the tuning and parallel resonance problems are eliminated associated with the existing proportional integral (PI) technique. To validate the performance of the controller, the system is tested under steady state and dynamic load conditions. Also, the proposed control algorithm working performance is compared with the existing p-q (reactive power compensation) theory based PI controller using MATLAB/Simulink.