分时电价政策下电气化铁路储能的经济性

Economy of energy storage in electrified railway under time-of-use price policy

分时电价政策下,储能尤其适用于工商业这类电价水平较高的用户侧。电气化铁路存在大量回馈制动能量,且无法进行反向计量,将这部分能量通过储能系统回收利用,不存在边际成本,可提高储能的经济性。以锂电池储能为对象,从牵引负荷的特点出发,分析了电气化铁路储能的方案可行性;考虑锂电池储能系统的特性,建立了电气化铁路储能的经济性模型;以财务内部收益率和净年值为评价指标,分析了电气化铁路储能的投资可行性。算例结果表明,通过合理的配置,电气化铁路储能具有良好的投资价值,且投资电气化铁路储能需要结合资本金、贷款利率、贷款时间等多个因素综合进行决策。

Under time-of-use price policy,energy storage is especially suitable for the user side with higher electricity price,such as industry and commercial users.The electrified railway generates a large amount of braking energy which cannot be measured in reverse.There is no marginal cost to recycle this part of energy through energy storage,which can improve the economy of energy storage.Based on lithium battery energy storage and the characteristics of traction load,the feasibility of energy storage scheme in electrified railway is analyzed.Considering the characteristics of lithium battery energy storage system,the economic model of electrified railway energy storage is established.With financial internal rate of return and net annual value as evaluation indexes,the investment value of energy storage in electrified railway is analyzed.The results show that the energy storage in electrified railway had good investment value through rational configuration.Moreover,it is necessary to make a comprehensive decision on the investment of energy storage in electrified railwayby combining capital,loan interest rate,loan time and other factors.