风煤比对超超临界机组变负荷瞬态特性的影响

doi:10.11930/j.issn.1004-9649.202302026

中国电力 ›› 2024, Vol. 57 ›› Issue (3): 224-232.DOI: 10.11930/j.issn.1004-9649.202302026

• 发电 • 上一篇

风煤比对超超临界机组变负荷瞬态特性的影响

张永¹(), 尹朝强², 刘宇钢², 张斌¹, 莫春鸿², 王朝阳³()

1. 国能蚌埠发电有限公司，安徽蚌埠　233000
2. 东方电气集团东方锅炉股份有限公司，四川成都　611731
3. 西安交通大学动力工程多相流国家重点实验室，陕西西安　710049

收稿日期:2023-03-07 出版日期:2024-03-28 发布日期:2024-03-26
作者简介:张永（1974—），男，高级工程师，从事火电厂经济运行调整、生产管理相关研究，E-mail：12052797@chnenergy.com.cn
王朝阳（1991—），男，通信作者，博士，副教授，从事燃煤发电热力系统动态建模与运行优化研究，E-mail：chaoyang.wang@xjtu.edu.cn
基金资助:
国家自然科学基金资助项目（燃煤发电与固体氧化物燃料电池发储一体化系统热电能流耦合机制研究，52106026）。

The Influence of the Air-coal Ratio on Transient Characteristics of the Ultra-supercritical Power Unit during the Load Cycling Processes

Yong ZHANG¹(), Chaoqiang YIN², Yugang LIU², Bin ZHANG¹, Chunhong MO², Chaoyang WANG³()

1. CHN Energy Bengbu Power Generation Co., Ltd., Bengbu 233000, China
2. Dongfang Boiler Co., Ltd., Chengdu 611731, China
3. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Received:2023-03-07 Online:2024-03-28 Published:2024-03-26
Supported by:
This work is supported by National Natural Science Foundation of China (Research on the Coupling Mechanism of Thermal and Electric Energy Flow in the Integrated Power Generation and Energy Storage System with the Coal-fired Power Plant and Solid Oxide Fuel Cells, No.52106026).

摘要/Abstract

摘要：

为获得风煤比对燃煤机组变负荷瞬态调峰特性的影响规律，基于660 MW超超临界二次再热燃煤机组动态模型，研究了风煤比对主再热汽温、减温水喷水量及瞬态发电能耗的影响，提出了在不同变负荷速率下汽温控制效果和发电能效的风煤比优化控制方案。结果表明：变负荷瞬态过程中，采用较大的风煤比有利于提高主再热汽温控制效果，但瞬态过程的平均发电煤耗率高。当变负荷速率在1%/min以内时，优先采用较小的风煤比可使机组瞬态过程平均发电煤耗率下降1.2 g/(kW·h)；当变负荷速率在2%~3%/min时，优先采用较高的风煤比，可保证主再热汽温偏差控制在10 ℃以内。

关键词: 风煤比, 二次再热, 变负荷, 汽温控制, 瞬态能耗

Abstract:

In order to study the influence of the air-coal ratio on the peak regulating characteristics of a coal-fired unit during load cycling transients, a dynamic model of a double-reheat ultra-supercritical coal-fired power plant with 660MW was established. The influence of the air-coal ratio on the live and reheat steam temperatures, the flowrates of the desuperheating water and the transient energy consumption was studied. A control scheme of air - coal ratio considering the steam temperature control effect and operational efficiency under different load cycling rates was proposed. The results show that, during the load cycling transient processes, a larger air-coal ratio benefits the stabilization of the live and reheat steam temperatures, while the average coal consumption rate of power during the transient process is higher. When the load cycling rate is equal to or less than 1%/min, a smaller air-coal ratio is preferred to reduce the average coal consumption by 1.2 g/(kW·h) during the load cycling transient process. When the load cycling rate is between 2%/min and 3%/min, a higher air-coal ratio is preferred to ensure that the deviations of the live and reheat steam temperatures can be controlled within 10℃．

Key words: air-coal ratio, double reheat, load cycling, steam temperature regulation, transient energy consumption

张永, 尹朝强, 刘宇钢, 张斌, 莫春鸿, 王朝阳. 风煤比对超超临界机组变负荷瞬态特性的影响[J]. 中国电力, 2024, 57(3): 224-232.

Yong ZHANG, Chaoqiang YIN, Yugang LIU, Bin ZHANG, Chunhong MO, Chaoyang WANG. The Influence of the Air-coal Ratio on Transient Characteristics of the Ultra-supercritical Power Unit during the Load Cycling Processes[J]. Electric Power, 2024, 57(3): 224-232.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202302026

https://www.electricpower.com.cn/CN/Y2024/V57/I3/224

图/表 13

图 1 超超临界二次再热燃煤机组热力系统

Fig.1 The thermal system of the ultra-supercritical double reheat coal-fired power plant

表 1 锅炉各受热面热力参数

Table 1 Thermal parameters of each heat surface in the boiler

工况	主汽温/ ℃	主汽压/ MPa	主汽流量/ (kg·s^–1)	给水温度/ ℃	给水压力/ MPa	一再汽温/ ℃	一再压力/ MPa	一再流量/ (kg·s^–1)	二再汽温/ ℃	二再压力/ MPa	二再流量/ (kg·s^–1)
BMCR	605	32.45	496.0	314	36.45	623	11.05	463.5	623	3.33	396.0
75%THA	605	23.45	341.0	303	25.52	623	7.46	307.7	623	2.29	269.4
50%THA	605	15.57	222.3	277	16.58	623	4.99	204.1	623	1.55	181.8

表 2 煤的工业分析和元素分析（收到基）

Table 2 Proximate and ultimate analyses of coal (as received)

工业分析/%				元素分析/%					Q_ar,net/(kJ·kg^–1)
M_ar	A_ar	V_ar	FC_ar	C_ar	H_ar	O_ar	N_ar	S_ar	Q_ar,net/(kJ·kg^–1)
8.25	24.30	38.64	28.81	54.80	3.88	7.16	0.91	0.70	21430

图 2 锅炉系统模型

Fig.2 Model of the boiler system

图 3 汽轮机系统模型

Fig.3 Model of the turbine system

表 3 不同工况下的过量空气系数

Table 3 Excess air coefficient at different work conditions

工况		α
BMCR		1.15
75%THA		1.20
50%THA		1.40

图 4 变负荷过程中过量空气系数（Ve = 1%/min）

Fig.4 Excess air coefficient during load cycling transients with Ve = 1%/min

图 5 不同升负荷速率下蒸汽温度变化

Fig.5 Trends of steam temperatures during the loading up process with different variation rates

图 6 不同升负荷速率下喷水量变化

Fig.6 Trends of spraying water during the loading up process with different variation rates

图 7 机组升负荷瞬态过程平均标准煤耗率

Fig.7 Average standard coal consumption of the power unit during loading up processes

图 8 不同降负荷速率下蒸汽温度变化

Fig.8 Trends of steam temperatures during the loading down process with different variation rates

图 9 不同降负荷速率下喷水量变化

Fig.9 Trends of spraying water during the loading down process with different variation rates

图 10 机组降负荷瞬态过程平均标准煤耗率

Fig.10 Average standard coal consumption of the power unit during loading down processes

参考文献 25

1	新华社. 习近平主持召开中央财经委员会第九次会议[EB/OL]. (2021-03-15) [2024-01-26]. http://www.gov.cn/xinwen/2021-03/15/content_5593154.htm.
2	周云龙, 杨美, 杨金福, 等. 二次再热燃煤机组疏水梯级预热空气系统研究[J]. 中国电机工程学报, 2022, 42 (S1): 177- 186.
	ZHOU Yunlong, YANG Mei, YANG Jinfu, et al. Study on drainage cascade preheating air system in double reheat coal-fired unit[J]. Proceedings of the CSEE, 2022, 42 (S1): 177- 186.
3	李雄威, 王昕, 顾佳伟, 等. 考虑火电深度调峰的风光火储系统日前优化调度[J]. 中国电力, 2023, 56 (1): 1- 7, 48.
	LI Xiongwei, WANG Xin, GU Jiawei, et al. Day-ahead optimal dispatching of wind-solar-thermal power storage system considering deep peak shaving of thermal power[J]. Electric Power, 2023, 56 (1): 1- 7, 48.
4	任大伟, 侯金鸣, 肖晋宇, 等. 支撑双碳目标的新型储能发展潜力及路径研究[J]. 中国电力, 2023, 56 (8): 17- 25.
	REN Dawei, HOU Jinming, XIAO Jinyu, et al. Research on development potential and path of new energy storage supporting carbon peak and carbon neutrality[J]. Electric Power, 2023, 56 (8): 17- 25.
5	董洁, 乔建强. “双碳” 目标下先进煤炭清洁利用发电技术研究综述[J]. 中国电力, 2022, 55 (8): 202- 212.
	DONG Jie, QIAO Jianqiang. A review on advanced clean coal power generation technology under "carbon peaking and carbon neutrality" goal[J]. Electric Power, 2022, 55 (8): 202- 212.
6	李祥勇, 吴昕, 庞春凤, 等. 两种灵活性改造技术的热电特性对比研究[J]. 中国电力, 2023, 56 (4): 192- 200.
	LI Xiangyong, WU Xin, PANG Chunfeng, et al. Comparative study of thermoelectric characteristics of two flexibility transformation technologies[J]. Electric Power, 2023, 56 (4): 192- 200.
7	国家发展改革委, 国家能源局. 关于印发《“十四五”现代能源体系规划》的通知[EB/OL]. (2022-03-22) [2024-01-26]. https://www.ndrc.gov.cn/xxgk/zcfb/ghwb/202203/t20220322_1320016.html.
8	谢天, 梁凌, 张婷, 等. 火电机组瞬态特性研究现状综述[J]. 中国电机工程学报, 2020, 40 (19): 6238- 6245.
	XIE Tian, LIANG Ling, ZHANG Ting, et al. Status quo in research on transient characteristics of thermal power unit[J]. Proceedings of the CSEE, 2020, 40 (19): 6238- 6245.
9	赵征, 于悦波, 孙昊天. 基于凝结水节流的新型协调优化控制策略[J]. 动力工程学报, 2021, 41 (2): 107- 112, 128.
	ZHAO Zheng, YU Yuebo, SUN Haotian. Optimization of a new coordinated control strategy based on condensate throttling[J]. Journal of Chinese Society of Power Engineering, 2021, 41 (2): 107- 112, 128.
10	RICHTER M, OELJEKLAUS G, GÖRNER K. Improving the load flexibility of coal-fired power plants by the integration of a thermal energy storage[J]. Applied Energy, 2019, 236, 607- 621. DOI
11	崔晓宁, 赵志刚, 姜宁, 等. 1000 MW超超临界二次再热锅炉系统㶲分析[J]. 动力工程学报, 2019, 39 (8): 605- 610, 617. DOI
	CUI Xiaoning, ZHAO Zhigang, JIANG Ning, et al. Exergy analysis of a 1000 MW ultra-supercritical double reheat boiler unit[J]. Journal of Chinese Society of Power Engineering, 2019, 39 (8): 605- 610, 617. DOI
12	姚丽萍. 超超临界二次再热机组热力系统优化与控制研究[D]. 南京: 东南大学, 2021.
	YAO Liping. Study on optimization and control of thermal system of ultra-supercritical secondary reheat unit [D]. Nanjing: Southeast University, 2021.
13	蔡宝玲, 高海东, 王剑钊, 等. 二次再热超超临界机组动态特性分析及控制策略验证[J]. 中国电机工程学报, 2016, 36 (19): 5288- 5299, 5411.
	CAI Baoling, GAO Haidong, WANG Jianzhao, et al. Dynamic process characteristic analysis and control strategy verification on double-reheat ultra-supercritical coal-fired power units[J]. Proceedings of the CSEE, 2016, 36 (19): 5288- 5299, 5411.
14	WU X, SHEN J, LI Y G, et al. Fuzzy modeling and predictive control of power plant steam temperature system[J]. IFAC, 2015, 48 (30): 397- 402. DOI
15	WU X, SHEN J, LI Y G, et al. Fuzzy modeling and predictive control of superheater steam temperature for power plant[J]. ISA Transactions, 2015, 56, 241- 251. DOI
16	FAN H J, XU W, ZHANG J, et al. Steam temperature regulation characteristics in a flexible ultra-supercritical boiler with a double reheat cycle based on a cell model[J]. Energy, 2021, 229, 120701. DOI
17	YU J X, PETERSEN N, LIU P, et al. Hybrid modelling and simulation of thermal systems of in-service power plants for digital twin development[J]. Energy, 2022, 260, 125088. DOI
18	GUO S S, LIU P, LI Z. Data reconciliation for the overall thermal system of a steam turbine power plant[J]. Applied Energy, 2016, 165, 1037- 1051. DOI
19	WANG C Y, QIAO Y Q, LIU M, et al. Enhancing peak shaving capability by optimizing reheat-steam temperature control of a double-reheat boiler[J]. Applied Energy, 2020, 260, 114341. DOI
20	WANG C Y, LIU Z F, FAN M Y, et al. Enhancing the flexibility and efficiency of a double-reheat coal-fired power unit by optimizing the steam temperature control: from simulation to application[J]. Applied Thermal Engineering, 2022, 217, 119240. DOI
21	董竹林, 牛玉广, 董恩伏, 等. 适应火电机组灵活运行的滑压曲线优化方法[J]. 动力工程学报, 2020, 40 (3): 256- 264.
	DONG Zhulin, NIU Yuguang, DONG Enfu, et al. Sliding pressure curve optimization for flexible operation of thermal power units[J]. Journal of Chinese Society of Power Engineering, 2020, 40 (3): 256- 264.
22	WANG P, SI F Q, CAO Y, et al. Prediction of superheated steam temperature for thermal power plants using a novel integrated method based on the hybrid model and attention mechanism[J]. Applied Thermal Engineering, 2022, 203, 117899. DOI
23	KIM H, KIM E K, KIM J, et al. Prediction-based feedforward control of superheated steam temperature of a power plant[J]. International Journal of Electrical Power & Energy Systems, 2015, 71, 351- 357.
24	WANG C Y, ZHAO Y L, LIU M, et al. Peak shaving operational optimization of supercritical coal-fired power plants by revising control strategy for water-fuel ratio[J]. Applied Energy, 2018, 216, 212- 223. DOI
25	谷俊杰, 杨智, 任晏伶, 等. 再热器喷水减温对机组煤耗率的影响研究[J]. 华北电力大学学报(自然科学版), 2011, 38 (1): 103- 106.
	GU Junjie, YANG Zhi, REN Yanling, et al. Influence study of water spraying in reheaters desuperheating on unit coal consumption[J]. Journal of North China Electric Power University (Natural Science Edition), 2011, 38 (1): 103- 106.

[1]	万明元, 任鑫, 王渡, 金亚飞, 王志刚, 王廷举, 杨昌宏, 刘昊坤. 100 MW级联式S-CO₂循环动态特性研究[J]. 中国电力, 2024, 57(12): 169-177.
[2]	张顺, 闫培飞, 姚洪宇, 李生鹏, 曹士保, 高亚洲. 亚临界汽包炉深度调峰安全性评估及控制优化技术[J]. 中国电力, 2020, 53(7): 203-210.
[3]	丁建良, 于国强, 罗建裕. 深度调峰下超超临界机组再热汽温控制优化[J]. 中国电力, 2020, 53(5): 143-149.
[4]	杨文虎. 1 350 MW超超临界汽轮机技术特点及分析[J]. 中国电力, 2020, 53(1): 162-168,176.
[5]	吕培鑫, 庞力平, 李明, 段立强, 杨勇平. 太阳能辅助燃煤发电系统变工况动态特性分析[J]. 中国电力, 2019, 52(7): 108-116.
[6]	段立强, 王婧, 庞力平, 种道彤, 俞基安, 刁保圣, 吕春俊. 二次再热机组高效灵活发电创新理论与方法[J]. 中国电力, 2019, 52(5): 1-12.
[7]	王珠, 韩翔, 许立环, 赵永亮, 种道彤. 一次调频参数对超超临界二次再热机组性能的影响[J]. 中国电力, 2019, 52(5): 54-62.
[8]	许威, 张剑, 范浩杰, 张忠孝, 孙蔚婷. 宽负荷下灵活二次再热超超临界锅炉调温特性研究[J]. 中国电力, 2019, 52(4): 119-126.
[9]	莫春鸿, 刘宇钢, 王冬平, 杨华春, 潘绍成, 易广宙. 更高参数二次再热超超临界锅炉关键技术探讨[J]. 中国电力, 2018, 51(9): 73-77,157.
[10]	邓攀, 王亚军. BEST技术用于超超临界二次再热机组的可行性分析[J]. 中国电力, 2018, 51(7): 84-89.
[11]	徐星, 谭锐, 李永生, 蔡培, 黄启龙, 马晓峰. 1 000 MW超超临界二次再热机组一次调频方式分析[J]. 中国电力, 2018, 51(2): 169-175.
[12]	牛海明, 邱忠昌, 黄焕袍. 1 000 MW二次再热超超临界机组再热汽温控制策略及工程应用[J]. 中国电力, 2017, 50(9): 138-142.
[13]	王林, 刘辉, 刘超, 高景辉, 赵志丹, 王红雨, 孟颖琪. 二次再热机组锅炉三段吹管技术研究[J]. 中国电力, 2017, 50(7): 69-73.
[14]	崔青汝, 牛海明. 1 000 MW二次再热火电机组主蒸汽温度控制策略及工程应用[J]. 中国电力, 2017, 50(6): 27-31.
[15]	黄焕袍, 阳光, 崔青汝. 1 000 MW二次再热超超临界机组分散控制系统关键技术研究及应用[J]. 中国电力, 2017, 50(6): 21-26.

风煤比对超超临界机组变负荷瞬态特性的影响

The Influence of the Air-coal Ratio on Transient Characteristics of the Ultra-supercritical Power Unit during the Load Cycling Processes

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 13

参考文献 25

相关文章 15

编辑推荐

Metrics

模态框（Modal）标题

风煤比对超超临界机组变负荷瞬态特性的影响

The Influence of the Air-coal Ratio on Transient Characteristics of the Ultra-supercritical Power Unit during the Load Cycling Processes

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 13

参考文献 25

相关文章 15

编辑推荐

Metrics