Gestion d’énergie d’une centrale à énergie renouvelable hybride dédiée à l’alimentation d’un site isolé

Abstract

This thesis aims to elaborate a local energy management and coordinated control system of a 15 kW Standalone Active PV Generator (SAAPG) supplying remote farm in southern Algeria. The SAAPG is constituted of four sources: PV, Batteries, Ultra-capacitor (UC) and diesel generator (DG), all these sources are coupled together on the DC-link (Vdc-ref = 700V). Unlike usual, a DC side coupling of the DG is proposed in order to ensure two dominant advantages: the first one is to slow the dynamics of the DG output power, allowing a low maintenance frequency in the diesel engine by reducing thermo-mechanical stresses in diesel engine cylinder heads due to transients. The second one, guarantees both efficiency and cost effectiveness of the system by operating the DG near to its rated power either in transient or steady state conditions, thus, a such oversizing of the DG will be avoided unlike the AC coupling case. All sources are managed in coordination, according to their dynamics, to maintain the DC-link voltage value regulated around its reference.