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(EGC-IES)构建两阶段规划模型，其中考虑将传统火电厂(TTPPs)改造为碳捕集电厂(CCPPs)，并通过电转气(PtG)技术将碳捕集电厂与燃气系统进行耦合。所提模型统筹考量碳捕集利用与封存(CCUS)/PtG设施的容量选型与选址布局，以及传统火电厂、碳捕集电厂、气源、电转气装置的运行成本，涵盖碳排放惩罚与CCUS项目收益。面对气候变化与碳排放规制政策的动态调整，本文还分析了碳价与碳税的不确定性，并将其纳入规划模型的考量范围。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。通过多组算例与分析讨论，验证了所提方法在降低碳排放、提升电-气耦合综合能源系统内CCUS项目收益方面的有效性。