Analysis of compressed air energy storage system coupled with coal-fired power unit

WANG Yan; LYU Kai; MA Tingshan; JU Wenping; ZHANG Jianyuan; XU Pengjiang; CHANG Dongfeng

doi:10.19666/j.rlfd.202104087

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Analysis of compressed air energy storage system coupled with coal-fired power unit

Thermal Power Generation Vol. 50, Issue 8, Pages: 54-63(2021)

更新时间：2025-09-28

- Analysis of compressed air energy storage system coupled with coal-fired power unit
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 西安西热节能技术有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202104087
  CLC： TM91;TM621
- Published：2021
- 稿件说明：
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WANG Yan, LYU Kai, MA Tingshan, et al. Analysis of compressed air energy storage system coupled with coal-fired power unit[J]. Thermal Power Generation, 2021, 50(8): 54-63.
DOI：

WANG Yan, LYU Kai, MA Tingshan, et al. Analysis of compressed air energy storage system coupled with coal-fired power unit[J]. Thermal Power Generation, 2021, 50(8): 54-63. DOI： 10.19666/j.rlfd.202104087.

摘要

煤电机组与大规模储能系统协调运行

可充分发挥储能灵活资源与煤电机组的调节能力

提升电力系统灵活性

促进电力系统低碳化转型。本文提出一种与煤电机组耦合的压缩空气储能系统

在压缩储能阶段利用煤电机组凝结水吸收空气圧缩热

在释能发电阶段利用机组给水/抽汽实现对膨胀机入口空气的梯级加热。分别对压缩、储能过程不同耦合方案进行了对比分析

得出给定参数下与煤电机组耦合的压缩空气储能系统的最优方案

并与传统带储热装置的压缩空气储能系统的运行效率进行了对比。结果表明

通过压缩空气储能系统与煤电机组热力循环的合理耦合

可使系统效率提升5百分点。

Abstract

The coordinated operation of coal-fired power units and large-scale energy storage systems can give full play to the flexible resources of energy storage systems and the adjustment capabilities of coal power units

enhancing the flexibility of the power system and promoting the low-carbon transformation of power system. In this paper

a compressed air energy storage system coupled with coal-fired power unit is proposed. In the air compression stage

the condensed water is used to absorb the heat of air compression

and in the air expansion stage

the feed water/extraction steam is used to realize cascade heating of the air at the expander inlet. The different coupling schemes of compression and energy storage processes are compared

and the optimal scheme of the coupling system with given parameters is proposed. Moreover

the operation efficiency of this system and the conventional compressed air energy storage system with heat storage device is compared. The results show that

the system efficiency can be increased by 5 percentage points through reasonable coupling of compressed air energy storage system and coal power unit.

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