Dynamic scheduling of hydrogen-containing integrated energy systems considering multi-energy transactions

Abstract

With the continuous development of hydrogen energy production and storage technology, hydrogen energy has gradually become one of the clean energy sources with acceptable cost. The hydrogen decarbonization process of natural gas pipeline transportation and its end energy units such as fuel cells is gradually accelerated. For this reason, considering a variety of energy markets, this paper establishes the operation scheduling model of the integrated energy system (IES) of combined cooling, heating, and power (CCHP) supply with the solid oxide fuel cell (SOFC) as the core which is compared with the traditional gas turbine cogeneration system in the economy and carbon emission reduction and introduces the model predictive control (MPC) algorithm to solve the rolling optimal scheduling scheme. The scheduling results show that the addition of hydrogen conversion units can effectively solve the phenomenon of light abandonment. Under the current energy price, when the proportion of photovoltaic (PV) installed capacity is greater than 0.33, the energy storage potential of hydrogen conversion units can be fully utilized and the economic benefits of SOFC co-production are better than gas turbines. After taking into account the high carbon emission factor of the power grid, there is no big difference in the carbon emission costs of the two cogeneration methods. When the carbon emission factor of the power grid is lower than 0.3 and the hydrogen production efficiency is higher than 75%, the carbon emission reduction benefits of SOFC have obvious advantages.