源-荷应用场景下储热式电锅炉投资经济性分析

Analysis of Investment Economy of Electric Boilers with Thermal Storage in Source-Load Application Scenarios

储热式电锅炉是一种电-热转换设备,可应用在电力系统的源、荷两侧,提升系统灵活性。为分析储热式电锅炉投资经济性,首先,基于储热式电锅炉在源-荷场景下运行模式的差异,构建不同场景下储热式电锅炉运行约束模型,分析不同模式下投资主体经济效益和社会综合效益构成;其次,基于时序生产模拟,以年度经济效益最大为目标,建立储热式电锅炉投资主体经济效益优化模型;最后,基于净现值法分析评估储热式电采暖投资主体的投资经济性,并以“三北”地区某省级电网开展实例分析,依据东北电力辅助服务市场运营规则测算,结果表明:不同应用模式均具有明显社会综合效益,热电厂投资模式的盈利能力最强,风电场投资模式和荷侧独立主体投资模式经济上不可持续,需要调整相应的市场运营策略。

Electric boilers with thermal storage are a kind of electric-thermal conversion equipment,and they can be applied on both the source side and the load side of a power system to improve the flexibility of the system.This paper was designed to analyze the investment economy of electric boilers with thermal storage.Specifically,it built operation constraint models for electric boilers with thermal storage in different scenarios on the basis of the different operation modes of electric boilers with thermal storage in sourceload scenarios and analyzed the composition of the economic benefits and comprehensive social benefits of the investment entities in different modes.Then,time-series production simulation was performed to construct an optimization model for the economic benefits of the investment entities for electric boilers with thermal storage with the objective of maximizing the annual economic benefits.Finally,the investment economy of the investment entities for electric heating with thermal storage was analyzed and evaluated by the net present value method.A provincial power grid in the Three North Region of China was further analyzed as an example,and investment economy was calculated according to the Northeast Electric Power Auxiliary Service Market Operation Rules.The results show that the application modes all have obvious comprehensive social benefits.The investment mode of thermal power plants has the highest profitability.In contrast,the investment modes of wind farms and load-side independent entities are not economically sustainable and thus require the adjustment of the corresponding market operation strategies.