Study on Off-design Characteristics of Energy Hub

Energy hub has been widely used in modeling of multi-energy system and energy Internet since it is put forward, and the general model of energy hub is developed and improved in this paper. The existing energy hub model used in previous studies is established based on the steady-state operation model of the energy conversion equipment, which only considers the factors of energy distribution and conversion efficiency in energy hub, but does not consider the off-design properties of energy conversion equipment. Therefore, this paper studies the off-design characteristics of gas turbine and heat recovery steam generator in the cogeneration energy hub, and brings the off-design characteristics of equipment into the energy hub model, so as to obtain off-design analysis model of energy hub. This work has important implications for the comprehensive energy efficiency assessment of multi-energy systems and energy Internet.