ABSTRACT
The system studied in this paper is a PV powered water pump system, consisting of a PV array, a low cost inverter, a permanent magnet synchronous motor (PMSM) and a water pump with a water storage. The PV array has a peak power of 4,32 kW. The overall control of the system consists of a current controller, a speed controller without a shaft sensor and a main control consisting of a voltage controller and the MPPT. The voltage control varies the speed of the PMSM to stay in the calculated optimum voltage given by the MPPT. Measured results of the different control units are presented to demonstrate the stability of the system.
