A Multi-drive Solar Pumping System with Reduced DC-link Current Ripple

Abstract

In this paper, a multiple drive solar-pumping system is presented. The system is based on a single-stage photovoltaic (PV) topology where an array of solar panels is connected to various inverters, with each inverter supplying a corresponding centrifugal pump. The inverters are operated to extract the maximum power available from the PV system. A standard indirect vector control strategy is used to regulate each machine currents. Moreover, a modulation strategy aiming to reduce the ripple of the inverters common DC link current is presented. Simulations results are shown and discussed.