考虑灵活碳捕集电厂与抽水蓄能联合的广义经济调度策略

Consider a Generalized Economic Dispatch Strategy Combining Flexible Carbon Capture Power Plants and Pumped Storage

“双碳”背景下,灵活碳捕集电厂成为风光大规模并网后保供电和低碳化的重要过渡电源之一;然而,因其储液容量制约和风光反调峰特性造成系统在应对持续增大的负荷峰谷差时存在局限,容易造成风光流失且碳经济性不高。为此,该文引入具有双向快速功率调节能力的大容量储能-抽水蓄能,提出一种基于灵活碳捕集电厂与抽水蓄能联合的广义经济调度策略;广义经济调度综合电厂运行成本、电网净负荷经济效益、碳经济效益等多种元素。首先充分利用能耗时移特性和抽水蓄能的双倍调节能力,结合净负荷典型峰谷特征制定二者联合运行在电碳解耦下“峰互补、谷协同”机制,实现深度调峰下兼顾碳捕集和新能源消纳;进而构建电-碳市场下考虑灵活性约束等因素的广义经济成本最小为目标的调度模型,用模糊参数表征净负荷的不确定性,采用改进灰狼算法求解。仿真结果表明所提两者联合的广义经济调度策略相较于仅考虑灵活碳捕集电厂,综合成本降低25.33%,碳排放量减少18.71%,弃风弃光成本下降98.70%,验证了所提联合调度策略的优越性。

Under the"dual carbon"goal,flexible carbon capture power plants have become an important transitional power source for power supply and low carbonization after large-scale wind and solar grid connection.However,due to the limitation of liquid storage capacity and the characteristics of wind-solar anti-peak regulation,the system has limitations in coping with the continuously increasing load peak-to-valley difference.Therefore,this paper introduces a large-capacity energy storage-pumped storage with bidirectional fast power regulation capability,and proposes a generalized economic dispatch strategy based on the combination of FCCPP and pumped storage.Generalized economic dispatch integrates various elements such as power plant operation cost,net load economic benefit of power grid,and carbon economic benefit.Firstly,make full use of the time-shifting characteristics of energy consumption and the double adjustment ability of pumped storage,and formulate the mechanism of“peak complementarity and valley synergy”under electric carbon decoupling combined with the typical peak-valley characteristics of net load,so as to achieve carbon capture and new energy consumption under deep peak regulation;In addition,a scheduling model with the goal of minimizing the minimum generalized economic cost considering flexibility constraints and other factors in the electricity-carbon market is constructed,the uncertainty of the net load is characterized by fuzzy parameters,and the improved gray wolf algorithm is used to solve it.The simulation results show that the proposed dispatching model can effectively combine the advantages of the two to improve the low-carbon economic benefit of the system;compared with only considering the FCCPP,the comprehensive cost is reduced by 25.33%,the carbon emission is reduced by 18.71%,and the cost of lost wind and solar is reduced by 98.70%,which confirms the superiority of the proposed joint scheduling strategy.