Two-stage Planning for Electricity-Gas Coupled Integrated Energy System with CCUS Considering Carbon 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 gas system. The sizing and siting of carbon capture, utilization and storage (CCUS)/PtG facilities, as well as the operation cost of TTPPs/CCPPs/gas sources/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 uncertainties of carbon price and carbon tax are also analyzed and considered in the proposed planning model. The deterministic planning, stochastic planning, and robust planning methods are introduced to verify mutually through economic and carbon indices. The proposed methods’ effectiveness in reducing carbon emissions, increasing CCUSs’ profit from EGC-IES are demonstrated through various cases and discussions.本文针对电-气耦合综合能源系统（Electricity-Gas Coupled Integrated Energy System, EGC-IES）提出两阶段规划模型，其中考虑将传统火力发电厂（Traditional Thermal Power Plants, TTPPs）改造为碳捕集电厂（Carbon Capture Power Plants, CCPPs），并通过电转气（Power to Gas, PtG）实现碳捕集电厂与燃气系统的耦合。所提模型统筹考量碳捕集利用与封存（Carbon Capture, Utilization and Storage, CCUS）/电转气设施的容量配置与选址，以及传统火力发电厂、碳捕集电厂、气源与电转气系统的运行成本，同时涵盖碳排放惩罚与碳捕集利用与封存收益。面对气候变化与碳排放规制政策的调整，本文同时分析碳价与碳税的不确定性，并将其纳入规划模型之中。本文引入确定性规划、随机规划与鲁棒规划三种方法，通过经济与碳排放指标开展相互验证。通过多组算例与讨论，验证了所提方法在降低碳排放、提升碳捕集利用与封存系统从电-气耦合综合能源系统中获取收益方面的有效性。