Research on the Operating Characteristics of Thermal Power Units Coupled with Molten Salt/High-pressure Water Thermal Storage and Compressed Air Energy Storage

LIU Yibo; LI Bin; WANG Xin; FU Zhengyang; WU Zhengren; WANG Guangyi

doi:10.19805/j.cnki.jcspe.2026.250120

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Research on the Operating Characteristics of Thermal Power Units Coupled with Molten Salt/High-pressure Water Thermal Storage and Compressed Air Energy Storage

更新时间：2026-10-10

- Research on the Operating Characteristics of Thermal Power Units Coupled with Molten Salt/High-pressure Water Thermal Storage and Compressed Air Energy Storage
- Chinese Journal of Power Engineering Vol. 46, Issue 5, Pages: 30-39(2026)
- 作者机构：
- 作者简介：
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- DOI：10.19805/j.cnki.jcspe.2026.250120
  CLC： TK224
- Published：2026
- 稿件说明：
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刘艺博, 李斌, 王鑫, 富征阳, 吴正人, 王广溢. 耦合熔盐/高压水储热和压缩空气储能的火电机组运行特性研究[J]. 动力工程学报, 2026, 46(5): 30-39.
刘艺博, 李斌, 王鑫, 富征阳, 吴正人, 王广溢. 耦合熔盐/高压水储热和压缩空气储能的火电机组运行特性研究[J]. 动力工程学报, 2026, 46(5): 30-39. DOI： 10.19805/j.cnki.jcspe.2026.250120.

DOI： 10.19805/j.cnki.jcspe.2026.250120

摘要

新能源发电装机量增长致电网调峰压力攀升

火电机组调峰任务加剧

但其灵活性与调峰能力不足。以某350 MW超临界燃煤机组为对象

实施熔盐/高压水储热改造

提出系列储热、释热策略

并在耦合复合储热系统的基础上进一步耦合压缩空气储能系统

探究不同储热及储能情形下机组调峰与热力性能的变化。结果表明:储热阶段

抽取主蒸汽和再热蒸汽分别吸收显热、显热和潜热的方案最佳

调峰容量达到43.60 MW;释热时

用高温熔盐加热给水制主蒸汽、高压热水预热和加热旁路低压加热器给水的方案的调峰深度则可达到7.71%

可以更高效地提高一体化系统的发电负荷;耦合压缩空气储能后

一体化系统的调峰容量随复合储热负荷与压缩空气储能容量的增大而增大

最低负荷可达到14.94%汽轮机热耗率验收(THA)负荷。

Abstract

The escalation in the installed capacity of renewable energy generation has led to a rise in peak regulation pressure on power grids

resulting in heavier peak regulation tasks being imposed on thermal power units

whose flexibility and peak regulation capacity have been found to be insufficient. A 350 MW supercritical coal-fired unit was taken as the research object

undergoing retrofitting with a molten salt/high-pressure water thermal energy storage system. A series of thermal storage and release strategies were proposed

and a compressed air energy storage (CAES) system was further coupled on the basis of the coupled composite thermal energy storage system to investigate the variations in peak regulation and thermal performance of the unit under different thermal storage and energy storage scenarios. Results indicate that during thermal storage phase

the optimal scheme involves the extraction of main steam and reheated steam for sensible heat absorption

and sensible and latent heat absorption

respectively

with a peak regulation capacity of 43.60 MW being achieved. During thermal release phase

the scheme in which feed water is heated by high-temperature molten salt to generate main steam

the application of high-pressure hot water is for preheating

and the bypass feed water of low-pressure heaters is heated

attains a peak regulation depth of 7.71%

enabling a more efficient enhancement of the power generation load of the integrated system. After being coupled with CAES system

the peak regulation capacity of the integrated system is observed to increase with the growth of the composite thermal storage load and CAES capacity

with the minimum load reaching 14.94% turbine heat acceptance (THA) load.

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references

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