ANFIS Based DC-Link Voltage Control of PWM Rectifier-Inverter System with Enhanced Dynamic Performance

In this paper, a direct power and torque control (DPTC) techniques of three-phase pulse with modulation (PWM) rectifier-inverter system using adaptive neuro-fuzzy inference system (ANFIS) controller for DC-link voltage regulation has been proposed. The main purpose of this study is to reduce the fluctuation and to reject the impact of load induction motor drive (IMD) on DC-link voltage. Indeed, the use of Proportional-Integral (PI) controller cannot achieve these objectives due to their disturbances sensitivity problem and limited regulation bandwidth. To avoid these problems, an ANFIS regulator has been designed and the inverter side output power is added to the reference active power in the rectifier side. The performance of the proposed regulation technique is compared to the PI regulator to show its effectiveness.