Dynamic modelling of a hybrid wind turbine in connection with compressed air energy storage through a power split transmission device

The share of renewable energy utilization is growing fast in recent years, resulting in an increase in intermittence in power supply systems. Additionally, the demand profile will change drastically in the short and long term through increasing electrification of transport and heating, respectively. It is an important task to address the impact caused by the generation and demand uncertainties. In this paper, a new hybrid wind turbine concept is presented comprising a small scale wind turbine, a scroll air motor and a planetary gear box, which acts as the key power transmission component. It functions as a power split device, allowing for smooth power generation by adding power through compressed air energy storage in moments of wind troughs and, furthermore, enables maximum power point tracking of the turbine. In this paper a dynamic mathematical model is derived and simulation results are analyzed, while highlighting the benefits of the proposed design structure.