Five-level series active power filter performances based on modified instantaneous reactive power theory for harmonic voltage disturbances compensation

摘要

This paper presents five-level series active power filter based on modified instantaneous reactive power theory control strategies. The standard configuration uses voltage source inverter with hysteresis controller, this configuration presents several drawbacks such us uneven switching frequency. Multilevel inverters are currently being investigated and used in various industrial applications. Five-level inverter is one of the most converters employed in medium and high power applications, their advantages include the capability to reduce the harmonic content and decrease the voltage or current ratings of the semiconductors. Today fuzzy controllers are successfully employed in various industrial applications; they represent a good alternative to classic control systems. To benefit of all these advantages a new control scheme for five-level series APF based on fuzzy techniques is proposed in this work. The proposed fuzzy voltage controller is designed to improve compensation capability of series active power filter by adjusting the voltage error using a fuzzy rule. The simulation is performed using MATLAB-Simulink and SimPowerSystem Toolbox; the obtained results demonstrate the effectiveness of the proposed fuzzy control compared to conventional hysteresis control system.