Combined-cycle gas turbine power plant integration with cascaded latent heat thermal storage for fast dynamic responses
Combined-cycle gas turbine power plant integration with cascaded latent heat thermal storage for fast dynamic responses
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DOI：
10.1016/j.enconman.2018.12.082
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发表时间：
2019-03
影响因子：
10.4
通讯作者：
Decai Li;Yukun Hu;Dacheng Li;Jihong Wang
中科院分区：
文献类型：
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作者：
Decai Li;Yukun Hu;Dacheng Li;Jihong Wang
随着可再生能源间歇性发电量的增加，要求联合循环燃气涡轮机（CCGT）电厂在负荷需求和电力供应之间提供必要的快速电网平衡服务。确保CCGT电厂灵活运行并同时保持其效率是极具挑战性的。本文介绍了一个联合循环燃气轮机发电厂与级联潜热存储（CLHS）的工厂灵活运行的可行性研究。基于一种新的建模方法，在白杨Plus中开发了一个420 MW的CCGT电厂和一个CLHS动态模型。研究了装置启动过程，CLHS在启动过程中可以积累大量的热能。针对负荷跟踪运行，进行了广泛的动态仿真研究，仿真结果表明，抽排的废气可用于蓄热充能，并将蓄热放出，产生高温高压蒸汽，供给蒸汽涡轮机。此外，储存的热量也可以用来维持热回收蒸汽发生器（HRSG）在温暖的条件下，以减少工厂重新启动时间。仿真结果表明，CLHS与CCGT电厂的整合是可行的，在启动，负载跟踪和停机操作。
The combined-cycle gas turbine (CCGT) power plants are often required to provide the essential fast grid balance service between the load demand and power supply with the increase of the intermittent power generation from renewable energy sources. It is extremely challenging to ensure CCGT power plants operating flexibly and also maintaining its efficiency at the same time. This paper presents the feasibility study of a CCGT power plant combined with the cascaded latent heat storage (CLHS) for plant flexible operation. A 420 MW CCGT power plant and a CLHS dynamic models are developed in Aspen Plus based on a novel modelling approach. The plant start-up processes are studied, and large amount of thermal energy can be accumulated by CLHS during the start-up. For load-following operation, extensive dynamic simulation study is conducted and the simulation results show that the extracted exhaust gas can be used for thermal energy storage charging, and the stored heat can be discharged to produce high temperature and high pressure steam fed to the steam turbine. Besides, the stored heat can also be used to maintain the heat recovery steam generator (HRSG) under warm condition to reduce plant restart-up time. The simulation results demonstrate that the integration of CLHS with CCGT power plant is feasible during the start-up, load-following and standstill operations.