Research and Evaluation on the Flexible Peaking Performance of Coal-fired Power Plants Coupled With Thermal Storage

被引：1
|
作者：
Gong Z. [1 ]
Shang P. [1 ]
Xu M. [2 ]
Zhang Y. [3 ]
Guo J. [4 ]
Han Y. [4 ]
Zhu L. [1 ]
Zheng W. [1 ]
机构：
[1] State Grid Shandong Electric Power Company Electric Power Research Institute, Shandong Province, Jinan
[2] School of New Energy, North China Electric Power University, Changping District, Beijing
[3] School of Control and Computer Engineering, North China Electric Power University, Changping District, Beijing
[4] Shandong Smart Grid Technology Innovation Center, Shandong Province, Jinan
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2024年 / 44卷 / 12期
关键词：
coal-fired power plant; molten salt; peak shaving capacity; thermal storage; thermodynamic performance; TOPSIS;
D O I：
10.13334/j.0258-8013.pcsee.231153
中图分类号：
学科分类号：
摘要：
In the context of achieving carbon peaking and carbon neutrality, coal-fired power will be the main peak-shaving power supply for a long time to ensure the safety and stability of the power grid. Thermal storage is an important method to improve the flexibility of coal-fired power plants, but the operation characteristics of coal-fired power coupled thermal storage systems are still unclear, necessitating urgent research on the adaptability of various thermal storage technologies in combination with coal-fired power plants. In this study, a 600 MW coal-fired power plant is integrated with a 90 MW thermal storage unit, of which sensible, latent, and thermochemical heat storage are considered. The peak regulation ability and thermodynamic performance of the system are investigated in the heat storage/release processes, and the optimal coupling scheme is determined following the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) method. In comparison with hot water and molten salt heat storage, Ca(OH)2/CaO thermochemical heat storage has the best peak shaving capacity, peak shaving depth, and exergy efficiency, while the molten salt heat storage performs best in the heat release process. By evaluating with TOPSIS method, the best heat storage scheme for hot water, molten salt and Ca(OH)2/CaO thermochemical heat storage is to extract the main steam as the heat source, and the best heat release scheme is using No.2 high-pressure water as the cold source. Besides, the coal-fired power coupling molten salt heat storage is the best coupling scheme. The relevant research conclusions can provide theoretical and data support for the construction of coal-fired power coupling heat storage peak shaving systems. © 2024 Chinese Society for Electrical Engineering. All rights reserved.
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页码：4837 / 4849
页数：12
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