电池储能电站即插即用运行控制技术研究

文章立足于电池储能应急支撑与规模化应用背景,指出电池储能电站(Battery Energy Storage Power Station,BESPS)即插即用(Plug and Play,PNP)的现实需求。通过分析2018年7月投运的江苏镇江MW级BESPS典型架构,首次提出实现BESPS PNP运行的关键技术应从信息流和能量流两个维度进行考虑。针对信息流层面分层通信要求,提出了BESPS并网自描述模型建立方法与信息交互机制,并阐述了分层通信的具体实现方法。针对能量流层面的物理接口集成驱动技术要求,研究并综述BESPS多状态平滑切换、主动电压与频率支撑、削峰填谷以及黑启动等高级应用。最后,采用多状态平滑切换的控制算法,通过仿真对BESPS能量流层面的柔性接入与退出响应过程进行验证。文章的研究工作对开发具有增强的可扩展性PNP功能BESPS设备,解决BESPS规模化灵活并网等实现问题有十分积极的指导意义与参考价值。

Techno-economic assessment of pulverized coal boilers and IGCC power plants with CO_(2) capture

The current studies on power plant technologies suggest that Integrated Gasification Combined Cycle(IGCC)systems are an effective and economic CO_(2) capture technology pathway.In addition,the system in conventional configuration has the advantage of being more“CO_(2) capture ready”than other technologies.Pulverized coal boilers(PC)have,however,proven high technical performance attributes and are economically often most practical technologies.To highlight the pros and cons of both technologies in connection with an integrated CO_(2) capture,a comparative analysis of ultrasupercritical PC and IGCC is carried out in this paper.The technical design,the mass and energy balance and the system optimizations are implemented by using the ECLIPSE chemical plant simulation software package.Built upon these technologies,the CO_(2) capture facilities are incorporated within the system.The most appropriate CO_(2) capture systems for the PC system selected for this work are the oxy-fuel system and the postcombustion scheme using Monoethanolamine solvent scrubber column(MEA).The IGCC systems are designed in two configurations:Water gas shift reactor and Selexol-based separation.Both options generate CO_(2)-rich and hydrogen rich-gas streams.Following the comparative analysis of the technical performance attributes of the above cycles,the economic assessment is carried out using the economic toolbox of ECLIPSE is seamlessly connected to the results of the mass and energy balance as well as the utility usages.The total cost assessment is implemented according to the stepcount exponential costing method using the dominant factors and/or a combination of parameters.Subsequently,based on a set of assumptions,the net present value estimation is implemented to calculate the breakeven electricity selling prices and the CO_(2) avoidance cost.