Sistema de acionamento de uma motobomba vibratória submersa alimentado por energia solar fotovoltáica

Abstract

Even nowadays, the lack of water and electricity in many localities distant from the main centers, are social problems that must be solved. In some cases the water pumping using solar energy can be a competitive and viable solution. This paper presents a DC-AC converter, powered by photovoltaic solar energy, with the objective of to drive a submerged vibratory water pump. The converter consists of two stages. The first stage comprises a three- state boost converter with high gain and high efficiency. In this converter its used a technique of control that seeks the maximum power point (MPPT), for a more efficient conversion. The second stage comprises a full-bridge voltage source inverter. The inverter operates at low frequency with a conventional fixed pulse width modulation strategy, to minimize the losses. An overall average efficiency of 90.5% is obtained. Qualitative and quantitative analysis of converters and experimental results, obtained from a prototype of 400W, are presented.