Low-Carbon Economic Dispatch of Coal Mine Integrated Energy System Considering Associated Energy Sources and CCS-P2G Coupling

Under the background of the "double carbon" goal, in order to realize carbon emissions reduction of energy systems and improve the energy utilization efficiency of the mining area, the paper proposes a low carbon economic scheduling model for coal mine integrated energy system (CMIES) considering associated energy resources and CCS-P2G coupling. First, the basic model of CMIES is established, and carbon capture and storage (CCS), power-to-gas (P2G) are used as a coupling unit to promote energy conservation and emission reduction and renewable energy consumption. Secondly, the reward and punishment ladder-type carbon trading mechanism are introduced, and a optimization scheduling model for CMIES is established to minimize the operating cost of by comprehensively considering the economy of the system and the low-carbon nature of the system. Finally, by setting up different scenarios for simulation analysis, the results show that the proposed model can promote the low-carbon and economic operation of CMIES.

I. Introduction

The integrated energy system (IES) improve energy utilization coordinating and optimizing different forms of energy conversion, , has become an important carrier of energy transformation [1]. As an important primary energy source, there are various forms of energy supply and demand in coal mining area , where around with abundant solar and wind resources. To make full use of renewable energy resources and associated energy generated in the mining process of mining area is conducive to the sustainable development of the CMIES. Mining areas produce associated energy sources such as gas, ventilation, and gushing water in the mining process. Coal mining usually accompanies with the discharge of coal mine associated energy resources, causing serious resources wasting and environmental pollution. At present, there have been some studies on the utilization of associated energy resources in CMIES. Reference [2] established an integrated energy system containing the coal gangue, coalbed methane and water influx to promote the recycling utilization of coal-associated resources. Reference [3] proposed a mine integrated energy system model containing light - storage - gas - waste mine pumping storage to improve the consumption of the distributed photovoltaic power and the utilization of mine energy resources . Reference [4] provided a flexible load-based CMIES scheduling model considering the economic cost, environmental cost, carbon trading cost and user dissatisfaction. Reference [5] proposed a stochastic environmental and economic dispatch (EED) model, which transforms stochastic optimization problems into deterministic optimization problems and improves the conservatism of model solving. Reference [6] proposes a scenario-based optimal reserve dispatch and security-constrained unit commitment model, and effectively solved the model using a computationally available mixed-integer linear programming algorithm. Above studies aimed to improve the utilization efficiency of associated energy in mining areas, but few of that addresses the impact of the comprehensive utilization of multi-associated energy on the low-carbon economic dispatching of CMIES.