Optimized Operation of Integrated Energy Systems Considering Tradable Green Certificate and Carbon Trading Mechanism

In order to cope with the challenges of green transition of the power system, and to reach carbon neutrality and emission peak goal, enhancing the integration of renewable energy and the diversified application of hydrogen energy is essential. In this context, this paper introduces an optimal operation model of an integrated energy system that incorporates tradable green certificate and carbon trading mechanisms. Firstly, taking into account the actual carbon emissions of coal- fired generating unit and gas-fired generating units, and analyzing the plenty of green certificates that can be certified based on the output of wind power units, a green certificate and carbon trading mechanism that suits integrated energy systems is built. Secondly, by summing up the costs of energy purchases, carbon trading, and green certificate transactions, and operation and maintenance cost as the objective function, and taking into account constraints such as wind power output, unit limitations, energy balance, equipment energy conversion and storage device restrictions, a low-carbon optimization scheduling model of the integrated energy system is established. Finally, the effectiveness of the proposed model is verified through three typical scenarios (only considering tradable green certificates, only considering the carbon market, and considering both tradable green certificates and the carbon market).