An integrated hybrid power system based on renewable energy sources

This paper presents the integration of various renewable sources (wind and solar) with their stochastic behaviour in a hybrid power system. The goal is to analyse the improvements of power quality and economic value of stochastic renewable sources. Within this work context, the renewable sources have continuous maximum power extraction and the two level power management is based on energy storage and loading through a grid-connected inverter. The structure of the system is presented and the local and global control strategy to attain power equilibrium and to ensure the continuity of deliverable energy is developed. The system behaviour under realistic meteorological conditions is simulated and the results are discussed.