Two-Stage Planning for Electricity-Gas Coupled Integrated Energy System With Carbon Capture, Utilization, and Storage Considering Carbon Tax and Price Uncertainties

In this article, we propose two-stage planning models for Electricity-Gas Coupled Integrated Energy System (EGC-IES), in which traditional thermal power plants (TTPPs) are considered to be retrofitted into carbon capture power plants (CCPPs), with power to gas (PtG) coupling CCPPs to the gas system. The sizing and siting of Carbon Capture, Utilization, and Storage (CCUS)/PtG facilities and the operation cost of TTPP/CCPP/gas source/PtG are all considered in the proposed model, including penalty on carbon emissions and revenue of CCUS. With changing policy on climate change and carbon emission regulation, the carbon price, carbon tax, and load uncertainties are also analyzed and considered in the proposed planning model. Stochastic planning and robust planning methods are introduced to verify mutually through economic and carbon indices. Various cases and discussions demonstrate the proposed methods’ effectiveness in reducing carbon emissions and increasing CCUS's profit from EGC-IES.