Theoretical and experimental study of control and energy management of a hybrid wind-photovoltaic system

This paper aims at the theoretical and experimental analysis of control and energy management of a standalone hybrid renewable energy system comprising wind and photovoltaic sources with battery storage. This system is characterized by a Very Low Voltage (VLV) node connection coupled to DC loads. An average model of a hybrid wind-photovoltaic generating system is proposed in this paper. It is shown that this model is interesting for analysing the dynamic behaviour of the system and for synthesising the control strategy. The control strategies of the sources are based on power, voltage and current control with Maximum Power Point Tracking (MPPT). Experiments based on a physical emulator of the hybrid system with a lead acid accumulator and its DC load are considered to validate theoretical studies. The real time supervision and the energy management of the hybrid system is presented and detailed. The proposed energy management strategy has been simulated and experimentally implemented. Numerical and experimental results are presented and discussed, showing the effectiveness of the proposed hybrid system.