【Applied Energy最新原创论文】光伏-光热混合电站设计运行协同优化

AEii国际应用能源 · 公众号 · · 2023-02-17 18:30

正文

原文信息

Simultaneous design and operational optimization of hybrid CSP-PV plants

原文链接：

https://www.sciencedirect.com/science/article/pii/S0306261922016269

Highlights

•MILP model for co-optimizing design and operation of hybrid CSP-PV plants.

•Comparison between CPS + thermal storage, PV + battery, and hybrid CSP-PV.

•Hybrid CSP-PV achieves lower cost of electricity for > 50 % dispatchability levels.

•Designs with electric heater have 3.6–10% lower LCOE compared to grid-integration.

摘要

可再生能源电站的可调度性和储能的作用息息相关，这推动了光热-光伏混合电站的发展。作者研究了高度集成的光热-光伏混合电站的优化设计。这种混合不仅发生在电网层面（作为虚拟电站的协同运行），还通过引入电加热器实现：多余的光伏电能通过电加热器转化为热能，并储存在光热储热罐中。整个系统的设计通过混合整数线性规划进行优化，该方法通过对所有非线性元素的精确线性化来同时优化系统设计和运行变量。研究结果表明，与独立运行电站（光热电站或光伏+电池）相比，混合电站能够以较低的发电成本实现相同甚至更好的可调度性（平准化度电成本降低了30%~50%）。

更多关于“hybrid CSP-PV plants”的文章请见：

https://www.sciencedirect.com/search?qs=hybrid%20CSP-PV%20plants&pub=Applied%20Energy&cid=271429

Abstr act

The dispatchability of renewable power plants and the role of energy storage are gaining relevance leading to the development of hybrid CSP-PV plants. This work investigates the optimal design of highly integrated CSP-PV power plants. The integration occurs not only at grid level (synergic operation as a virtual power plant), but also through the introduction of electric heaters, placed in parallel to the solar field: the excess PV electricity is converted into heat by electric heaters and stored in the CSP hot storage tank. The whole system design is optimized devising an ad hoc Mixed Integer Linear Program (MILP) which co-optimizes design and operational variables with accurate linearization of all nonlinear effects. Compared to the respective stand-alone technologies (only CSP or PV plus battery), the results show that the hybrid solutions can achieve similar or better dispatchability levels at a lower cost of electricity (LCOE reduction between −30% and −50%).

Keywords

CSP

Hybrid plants

MILP

Virtual power plant

Dispatchability

Optimization

Graphics