耦合蒸汽熔盐储热的燃煤机组调频响应特性研究

摘要
图/表
参考文献
相关文章 (5)

全文: PDF (2339 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为研究蒸汽熔盐储热对燃煤机组调频性能的提升情况,本文建立熔盐储热系统的动态模型,分析熔盐蓄热阶段与放热阶段的动态特性。以一台330 MW亚临界燃煤机组为例,提出基于功率偏差的熔盐辅助机组调频的控制方法,并研究耦合蒸汽熔盐储热的燃煤机组自动发电控制（AGC）的响应特性。研究结果表明,相较于放热阶段,机组在蓄热阶段的功率响应幅度更大,响应速度更快。熔盐通过蓄热/放热过程弥补了由于燃煤机组热惯性导致的响应不足,燃煤机组的AGC响应品质明显提升,改善了超调与反调现象。在1 200 s时间内,综合响应指标K_p平均值从1.21提升至3.04,平均变负荷速率从0.99%P_N/min提升至3.32%P_N/min。在此过程中,熔盐储热的平均功率响应贡献率达71%,表明蒸汽熔盐储热技术可显著提升燃煤机组调频性能。本文研究对推动熔盐储热技术在燃煤电厂的应用拓展具有重要意义。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	栾俊
	马勇
	宋磊
	葛明明
	尚志杰

关键词 ：熔盐储热, 燃煤机组, 自动发电控制（AGC）, 动态特性

Abstract：To investigate the improvement of steam molten salt thermal energy storage (TES) on the frequency regulation performance of coal-fired units, this paper establishes a dynamic model of the molten salt TES system and analyzes the dynamic characteristics of the molten salt during the charging and discharging stages. Taking a 330 MW subcritical coal-fired unit as an example, a control method for molten salt-assisted unit frequency regulation based on power deviation is proposed, and the automatic generation control (AGC) response characteristics of coal-fired units coupled with steam molten salt TES are studied. The research results show that the power response amplitude and speed of the unit during the charging stage are greater and faster than those during the discharging stage. The charging/discharging process of molten salt TES can partially compensate for the response deficiency caused by the thermal inertia of coal-fired units, significantly improving the AGC response quality of coal-fired units and alleviating overshoot and reverse adjustment to a certain extent. Within 1 200 seconds, the average value of the comprehensive response index K_p increases from 1.21 to 3.04, and the average load change rate increases from 0.99%P_N/min to 3.32%P_N/min. During this process, the average power response contribution rate of molten salt TES reaches 71%, indicating that the steam molten salt TES technology can significantly enhance the frequency regulation performance of coal-fired units. This study is of great significance for promoting the application and expansion of molten salt TES technology in coal-fired power plants.

Key words： molten salt thermal energy storage coal-fired unit automatic generation control (AGC) dynamic characteristics

收稿日期: 2025-05-07

作者简介: 栾俊（1978—）,男,山东青岛人,高级工程师,主要从事电厂节能技术、安全生产管理方面的工作。

引用本文:

栾俊, 马勇, 宋磊, 葛明明, 尚志杰. 耦合蒸汽熔盐储热的燃煤机组调频响应特性研究[J]. 电气技术, 2025, 26(9): 13-20. LUAN Jun, MA Yong, SONG Lei, GE Mingming, SHANG Zhijie. Study on frequency regulation response characteristics of a coal-fired unit integrating steam molten salt thermal energy storage. Electrical Engineering, 2025, 26(9): 13-20.

链接本文:

https://dqjs.cesmedia.cn/CN/Y2025/V26/I9/13

[1] WANG Congyu, SONG Jiwei, ZHENG Wei, et al.Integration of compressed air energy storage into combined heat and power plants: a solution to flexibility and economy[J]. Energy Conversion and Management, 2023, 290: 117215.
[2] 李军徽, 潘雅慧, 穆钢, 等. 高比例风电系统中储能集群辅助火电机组调峰分层优化控制策略[J]. 电工技术学报, 2025, 40(7): 2127-2145.
[3] 杨浩, 宋贞寒, 施啸寒, 等. 计及风电场涉网功率平抑与AGC考核的混合储能容量优化配置[J/OL]. 电工技术学报, 1-16 (2025-04-08) [2025-07-10]. https://doi.org/10.19595/j.cnki.1000-6753.tces.242194.
[4] ZHAO Yongliang, WANG Chaoyang, LIU Ming, et al.Improving operational flexibility by regulating extra- ction steam of high-pressure heaters on a 660 MW supercritical coal-fired power plant: a dynamic simulation[J]. Applied Energy, 2018, 212: 1295-1309.
[5] HAN Zhonghe, XIANG Peng.Modeling condensate throttling to improve the load change performance of cogeneration units[J]. Energy, 2020, 192: 116684.
[6] 肖家杰, 李培强, 毛志宇, 等. 考虑火电时滞特性的电池储能集群调频综合控制策略研究[J]. 电工技术学报, 2025, 40(3): 689-704.
[7] 黄策, 燕云飞, 沈迎, 等. 超容储能辅助火电机组调频的电气问题研究[J]. 电气技术, 2022, 23(8): 103-108.
[8] 沈迎, 黄策, 胡锡东, 等. 锂离子电容器参与火电机组调频研究[J]. 电气技术, 2021, 22(10): 98-103.
[9] YANG Tingting, LIU Ziyuan, ZENG Deliang, et al.Simulation and evaluation of flexible enhancement of thermal power unit coupled with flywheel energy storage array[J]. Energy, 2023, 281: 128239.
[10] 王圣, 延寒, 李健, 等. 计及电池寿命的储能系统参与二次调频功率分配策略[J]. 洁净煤技术, 2024, 30(9): 95-101.
[11] 孙海翠. 一种基于光伏-光热-储能联合发电的能源基地功率协调控制方案[J]. 电气技术, 2024, 25(11): 22-29.
[12] 张可臻, 刘明, 赵永亮, 等. 燃煤机组集成再热蒸汽熔盐储热系统的运行灵活性与热力性能分析[J]. 工程热物理学报, 2023, 44(9): 2331-2339.
[13] 庞力平, 张世刚, 段立强. 高温熔盐储能提高二次再热机组灵活性研究[J]. 中国电机工程学报, 2021, 41(8): 2682-2691.
[14] 宋晓辉, 韩伟, 王兴, 等. 基于高温熔盐储热系统的火电机组深度调峰方案对比及分析[J]. 热能动力工程, 2023, 38(11): 63-74, 83.
[15] MA Tingshan, LI Zhengkuan, LYU Kai, et al.Design and performance analysis of deep peak shaving scheme for thermal power units based on high-temperature molten salt heat storage system[J]. Energy, 2024, 288: 129557.
[16] 苗林, 刘明, 张可臻, 等. 集成电制热熔盐储热的燃煤发电系统热力性能研究[J]. 工程热物理学报, 2023, 44(11): 2999-3007.
[17] CHEN Xia, WU Yuting, WANG Chao, et al.Flow and mixed convection heat transfer of Hitec salt in multi-sided heating pipes[J]. Sustainable Energy Technologies and Assessments, 2021, 47: 101375.
[18] LI Xiaolei, XU Ershu, SONG Shuang, et al.Dynamic simulation of two-tank indirect thermal energy storage system with molten salt[J]. Renewable Energy, 2017, 113: 1311-1319.
[19] BONILLA J, DE LA CALLE A, RODRÍGUEZ- GARCÍA M M, et al. Study on shell-and-tube heat exchanger models with different degree of complexity for process simulation and control design[J]. Applied Thermal Engineering, 2017, 124: 1425-1440.
[20] 王玮, 孙阳, 刘吉臻, 等. 适应电网快速调频的热电联产机组新型变负荷控制策略[J]. 电力系统自动化, 2018, 42(21): 63-69.
[21] CHEN Chen, ZHAO Chenyu, LIU Ming, et al.Enhancing the load cycling rate of subcritical coal- fired power plants: a novel control strategy based on data-driven feedwater active regulation[J]. Energy, 2024, 312: 133627.