Development and Performance Analysis of Stand-Alone PV-Based Induction Motor Drive

This paper presents a three-stage control system to feed a squirrel-cage induction motor (SCIM) from stand-alone PV systems, through cascaded two-level inverters and an open-winding transformer. The main objective of this system is to extract the effective PV power, while maintaining the DC link voltage in presence of the load torque and solar irradiance variation. The DC link voltage controller is developing the reference speed for the speed controller, followed by current controller. The speed and current controllers are developed through rotor flux-oriented vector control. The SVPWM modulation technique is used to supply the desired voltage vector to the SCIM for good dynamic response. The MATLAB/Simulink simulation results are showing the worth of this proposed control strategy at considered operational conditions.