Coupled model and optimal operation analysis of power hub for multi-heterogeneous energy generation power system

A multi-heterogeneous energy generation power system (MHEGPS) including wind power, solar power, hydro power, gas power, storage and so on, is an effective way to cope with the increasing demand for energy. In the paper, a novel framework of power hub is introduced to analyze the model of the multi-heterogeneous energy generation power system. A power flow coupled matrix model for the power hub of the multi-heterogeneous energy generation power system is proposed to represent characteristics and connection relationships of energy converters and storages. Further, an optimal operation model to minimize the operation cost is put forward considering the different scenes based on the power hub. Case studies are carried out in different scenes for the multi-heterogeneous energy generation power system. Power generation systems and storage units in different electricity tariff are also discussed. Results show that the electric energy storage units could realize the time sequence shifting of electric energy by charging and discharging to reduce the operation cost of the whole power hub. The real time price (RTP) is superior to the time-of-use price (TOUP) in all cases. Simulation results prove that the optimal operation model is effective and the proposed modeling method provides an alternative method for the complex hybrid energy power system. (C) 2019 Elsevier Ltd. All rights reserved.