Economic-emission dispatch problem in a biomass-coal co-firing CCHP system based on natural gas deep peak-shaving and carbon capture technologies

Abstract

Driven by the carbon peaking and carbon neutrality goals, the multi-energy coupling relationship of the combined cooling heat and power (CCHP) system is more complex than before, and the green and low-carbon transformation of energy needs to be promoted. Hence, this paper proposes a biomass-coal co-firing CCHP system based on natural gas deep peak-shaving and carbon capture technologies. Firstly, a deep peak-shaving model of the hydrogen gas turbine is established. Furthermore, the impact of deep peak-shaving cost allocation and compensation mechanism on the system is analyzed. Secondly, a biomass-coal co-firing model with carbon capture is constructed to reduce the carbon emission of the system. Thirdly, a heat-electric-cold demand coupling response model is set to accurately describe the coupled response relationship of various types of loads in response to an increase in the price of electricity. Finally, a low-carbon economic dispatch model of a biomass-coal co-firing CCHP system based on gas deep peak-shaving and carbon capture is constructed to minimize the total system operation cost, and the effectiveness of the model is verified by arithmetic examples. The results show that the proposed strategy can improve the economy, low carbon, and energy efficiency of the co-dispatch of the integrated energy system (IES).