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，考虑将传统火力发电厂（traditional thermal power plants，TTPPs）改造为碳捕获发电厂（carbon capture power plants，CCPPs），并通过电转气（power to gas，PtG）设施实现碳捕获发电厂与燃气系统的耦合。所提模型统筹考量碳捕获、利用与封存（carbon capture, utilization and storage，CCUS）/电转气设施的容量配置与选址方案，同时纳入传统火力发电厂/碳捕获发电厂/气源/电转气设施的运行成本，涵盖碳排放惩罚成本与碳捕获、利用与封存的收益。随着气候变化政策与碳排放监管规则的持续演变，碳价与碳税的不确定性也被纳入所提规划模型进行分析与考量。本文采用确定性规划、随机规划与鲁棒规划三种方法，通过经济指标与碳减排指标开展相互验证。通过多组算例与讨论，验证了所提方法在降低碳排放总量、提升碳捕获、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。