Particle swarm optimization and genetic algorithm based harmonic mitigation methods

Electrical power system consists of wide range of electrical, electronic and power electronic equipment in commercial and industrial applications. Since most of the electronic equipment is non-linear in nature, these will induce harmonics in the system, which affects the sensitive loads to be fed from the system. One among the compensating devices is Unified Power Quality Conditioner (UPQC), which specifically aims at the integration of series active and shunt active power filters to mitigate any type of voltage and current fluctuations and power factor correction in the power distribution network such that improved power quality is made available at the point of common coupling. This project discusses the compensating principle and different control strategies (GA based PI) of the UPQC in detail and the results are compared with FUZZY UPQC and ANN UPQC.GA are programmed in MATLAB and the control strategies are modeled using SIMULINK. The performance of UPQC is examined by considering a thyristor rectifier feeding an RL-load (non-linear load) that acts as source of harmonics to the system of concern. The simulation results are used in comparison of different control strategies.