【目的】为降低电力系统碳排放量,提高清洁能源消纳率,以总成本最小化为目标,提出一种基于热电联产-碳捕集-电转气(combined heat and power (CHP)-carbon capture and storage (CCS)-power-to-gas(P2G), CCP)耦合机制和低碳需求响应(low-carbon demand response, LCDR)的多能耦合区域综合能源系统(regional integrated energy systems, RIES)协同优化方法,构建源-荷双向灵活低碳调度模型。【方法】首先,在供给侧引入碳交易-绿色证书机制,建立基于基准线法的碳排放分配模型,激励系统消纳可再生能源;其次,以CHP-CCS-P2G多能耦合机组为基础,通过碳循环利用与能量梯级转化,实现系统能效提升;然后,荷侧引入计及负荷特性差异的低碳需求响应机制,建立基于价格弹性矩阵的电、热负荷双向互动机制,以降低负荷峰谷差值。【结果】以中国南方某城市某行政区的电力相关数据进行相关仿真实验,结果表明在所提方法下,系统的碳排放和运行成本均有下降,风光消纳能力有所提高,其中场景6较基础场景的运行成本减少了5.26%。【结论】所提方法可使得碳元素形成闭环转化,有效降低传统发电机组的出力,增加新能源的上网功率,同时可通过激励信号实现“削峰填谷”,降低系统的碳排放,使系统处于低碳经济运行状态。
Abstract
[Objective] In order to reduce carbon emissions in the power system and improve the absorption rate of clean energy, with the goal of minimizing total cost, a multi energy coupling regional integrated energy systems (RIES) collaborative optimization method based on combined heat and power (CHP)-carbon capture and storage(CCS)-power-to-gas (P2G) (CCP) coupling mechanism and LCDR (low-carbon demand response, LCDR) is proposed, and a source load bidirectional flexible low-carbon scheduling model is constructed. [Methods] Firstly, a carbon trading green certificate mechanism is introduced on the supply side, and a carbon emission allocation model based on the baseline method is established to incentivize the system to consume renewable energy; Secondly, based on the CHP-CCS-P2G multi energy coupling unit, the system's energy efficiency can be improved through carbon recycling and energy cascade conversion; Then, the load side introduces a low carbon demand response mechanism that takes into account differences in load characteristics, establishing a bidirectional interaction mechanism between electricity and heat loads based on price elasticity matrices to reduce peak to valley load differences. [Results] Relevant simulation experiments were conducted using electricity related data from an administrative district in a city in southern China. The results showed that under the proposed method, the system's carbon emissions and operating costs were reduced, and the wind and solar power consumption capacity was improved. Among them, scenario 6 reduced the operating costs by 5.26% compared to the basic scenario. [Conclusions] The method proposed in the article can form a closed-loop conversion of carbon elements, effectively reduce the output of traditional power generation units, increase the grid power of new energy, and achieve "peak shaving and valley filling" through excitation signals, reducing the carbon emissions of the system and putting it in a low-carbon economic operation state.
关键词
源-荷双向灵活 /
低碳需求响应（LCDR） /
区域综合能源系统（RIES） /
低碳经济调度
Key words
bi-directional flexibility between supply and demand /
low-carbon demand response (LCDR) /
regional integrated energy system (RIES) /
low-carbon economic dispatch
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基金
国家自然科学基金项目(52311530337)
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