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计及电转气热回收的综合能源系统蓄热罐容量规划与运行策略
李东森1, 高赐威1, 赵明2
1.东南大学 电气工程学院,江苏 南京 210096;2.云南省电力试验研究院(集团)有限公司 电力科学研究院,云南 昆明 650051
摘要:
针对电转气的强放热反应特性未得到充分重视和仅配置储热来增大风电消纳空间的方法存在局限的现状,在分析和考虑电转气热回收价值的基础上,建立兼顾规划经济性和弃风率的综合能源系统蓄热罐容量多目标优化模型,并使用法线边界交叉(NBI)法提供可行的求解Pareto前沿的方案。通过对比在不同电转气运行成本与不同放热效率情形下的系统规划与运行策略,分析接入电转气且考虑其热回收对配置储热的综合能源系统规划与运行的影响。基于典型算例研究,结果表明在电转气与储热装置的协同消纳弃风方式下,随着电转气放热效率提高与运行成本降低,电转气的弃风消纳能力将提高,其供热、气效益将提高,系统运行成本将降低,同时储热装置供热任务得以减轻,进而影响储热装置的规划策略。
关键词:  综合能源系统  风电消纳  电转气  热回收  蓄热罐  容量优化
DOI:10.16081/j.epae.201908048
分类号:TM715;TK018
基金项目:云南电网电力科学研究院科技项目(YNKJXM-20180254)
Capacity planning and operating strategy of heat accumulator for integrated energy system considering heat recovery of power-to-gas
LI Dongsen1, GAO Ciwei1, ZHAO Ming2
1.School of Electrical Engineering, Southeast University, Nanjing 210096, China;2.Electric Power Research Institute, Yunnan Electric Power Test & Research Institute Group Co.,Ltd.,Kunming 650051, China
Abstract:
In view of the current situation that the strong exothermic reaction characteristics of power-to-gas units have not been fully considered and the existing approaches to install heat accumulator to increase the accommodation of wind power have limitations. Thus, a multi-objective optimization model for the capa-city planning of heat accumulator that considers both economic costs and wind power accommodations is established. Meanwhile, the value of heat recovery of power-to-gas units is analyzed, and the NBI(Normal Boundary Intersection) approach is employed to provide a feasible solution to the Pareto frontier. By comparing the planning and operation strategies under different unit costs and exothermic efficiencies of power-to-gas, the impacts of power-to-gas with heat recovery on the integrated energy system planning and operation are analyzed. Numerical results on typical examples show that under the abandoned wind co-accommodation mode of power-to-gas and heat storage, the reduction of unit cost and the improvement of exothermic efficiency of power-to-gas positively contribute to accommodating wind power. At the same time, the opera-ting cost is reduced due to improved efficiency of heat and gas supply. In addition, the heating task of the heat accumulator is reduced, which impacts the planning strategy of the heat accumulator.
Key words:  integrated energy system  wind power accommodation  power-to-gas  heat recovery  heat accumulator  capacity optimization

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