Solar PV fed FSVSI based Variable Speed IM Drive using ASVM Technique

Abstract

This research article discloses a solar photovoltaic (SPV) fed 3-φ induction motor (IM) drive aimed at water pumping applications using a three-phase four-switch voltage source inverter (FSVSI). The inverter used has a lower number of switches, reduced gate driver circuits, less switching losses, and is less costly than the orthodox six-switch voltage source inverters (SVSI). Here, the overall system consists of two power conditioning units for duty ratio control of the DC-DC boost converter and a 3-φ FSVSI for controlling and power conversion of DC/AC at a desired level. Moreover, using a boost converter and the P&O maximum power point tracking (MPPT) algorithm, the maximum power is extracted from the SPV system. The indirect vector control (IDVC) is utilized for the IM to provide effective speed control. The SPV system output power depends upon solar irradiation. Hence, the DC voltage and currents vary according to the irradiation. Here, the constant DC-link voltage is achieved using voltage control of the inverter. The anticipated SPV-fed FSVSI IM operation is executed at different insolation stages in the MATLAB as well as validated experimentally using DSPACE DS-1104.

Keywords

• Boost converter
• Four switch inverter
• Indirect vector control
• Induction motor drive
• Solar photovoltaic system