Fuzzy and Adaptive Control Strategies of Voltage Source Converter for Correction of Power Factor

technology led to design of faster power electronic switches with higher ratings.These devices have been used to improve the performance of various power converter systems. To improve the power quality and power flow control the Voltage Source Converter (VSC) has been widely used in power systems. This work presents and compares the performance of three controllers namely vector control, Adaptive control and Fuzzy logic control schemes applied to a voltage source converter which operates an active power filter. The proposed method depends on an approximate third order nonlinear model of the VSC that accounts for the uncertainty in the three system parameters. The design ensures the asymptotic tracking of dc voltage and q-axis current reference trajectories. This approach is so-called full adaptive control. The design of Fuzzy control rule based on the general dynamic behaviour of the process. A new control method is implemented for suppressing the harmonics is fuzzy logic control. The power factor correction process is achieved without employing any complicated control logic. The performance of various controllers is examined and various simulations were carried out in MATLAB environment.