Research on thermo-electric decoupling technology and economic evaluation of large double reheat heating units

于俊红; 孙立刚; 李禄明; 李禹江; 李琳; 马雲腾; 王梦涵; 许诚

doi:10.19666/j.rlfd.202502028

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Research on thermo-electric decoupling technology and economic evaluation of large double reheat heating units

Thermal Power Generation Vol. 54, Issue 11, Pages: 142-150(2025)

更新时间：2026-08-11

- Research on thermo-electric decoupling technology and economic evaluation of large double reheat heating units
- 作者机构：
  
  1. 山东电力工程咨询院有限公司
  2. 华北电力大学能源动力与机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202502028
  CLC： TM621
- Published：2025
- 稿件说明：
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[1]于俊红,孙立刚,李禄明,等.大型二次再热供热机组热电解耦技术研究与经济性评价[J],2025,54(11):142-150.
[1]于俊红,孙立刚,李禄明,等.大型二次再热供热机组热电解耦技术研究与经济性评价[J],2025,54(11):142-150. DOI： 10.19666/j.rlfd.202502028.

DOI：10.19666/j.rlfd.202502028.

摘要

为提高供热机组的调峰性能，提出了一种集成切缸、高中低压旁路供热、热泵、热水罐和电锅炉5种热电解耦技术的新型二次再热供热机组流程，构建了详细的热力学分析模型，对比分析了参比电厂与新型电厂的调峰性能，依托电力现货市场，提出了系统的经济运行策略，并开展了技术经济性评估。结果表明：当供热需求为1 460 MW时，参比电厂在抽凝工况下无法满足供热需求，在切缸工况下，参比电厂的负荷调节范围为额定负荷的77.9%～80.0%，几乎丧失了负荷调节能力，而在切缸+旁路工况下，参比电厂的负荷调节范围为50.0%～80.0%，调峰能力有所改善；对于新型电厂，在相同的供热需求下，负荷调节范围扩增至0～80.0%，尤其是在电力低谷期可实现零功率上网；与参比机组相比，新型机组每月可减少低谷期上网电量约10.76万MW·h，节省燃煤量约1.77万吨，每年在采暖季可增加净收益约6 898.8万元，新增设备投资回收期约5.6年，经济效益显著。

Abstract

To enhance the peak shaving performance of heating units

a new process for double-reheat heating unit integrating five thermo-electric decoupling technologies

namely cylinder cut-off

high-/medium-and low-pressure bypass heating

heat pump

hot water tank and electric boiler

has been proposed. A detailed thermodynamic model of the system was established

and the peak shaving performance of the novel power plant is compared with that of a reference power plant. Relying on the electricity market

a systematic economic operation strategy was put forward

and a techno-economic analysis was performed. The results show that

when the heating demand is 1 460 MW

the reference plant cannot meet the heating demand under the extraction-condensing condition. Under the cylinder cut-off condition

the load regulation range of the reference plant is 77.9% to 80.0% of the rated load

and it almost loses its load regulation ability. While under the cylinder cut-off + bypass condition

the load regulation range of the reference unit is 50.0%～80.0%

and its peak regulation ability has been improved. For the novel plant

in the same heating demand

the load regulation range has been expanded to 0～80.0%

and zero-power grid connection can be achieved especially during the low electricity demand period. Compared with the reference plant

the novel plant can reduce the power output during peak shaving periods by 107 600 MW·h per month

save 17 700 tons of coal

achieve an annual net profit increase of approximately 68.988 million yuan during the heating season

and have a payback period for new equipment investment of 5.6 years

demonstrating significant economic benefits.

关键词

Keywords

references

赫广迅,祝海义,刘鑫,等.煤电汽轮机超低负荷深度调峰能力探索[J].洁净煤技术, 2024, 30(增刊2):326-334.HE Guangxun, ZHU Haiyi, LIU Xin, et al. Exploration of ultra-low load deep peak sharing capability of coal-fired power turbine[J]. Clean Coal Technology, 2024,30(Suppl.2):326-334.

王艳,徐进良,谢剑,等.支撑超灵活燃煤发电的储能系统熔盐筛选[J].中国电机工程学报, 2025, 45(20):8053-8067.WANG Yan, XU Jinliang, XIE Jian, et al. Molten salt selection for thermal energy storage system of ultra-flexible coal-fired power plant[J]. Proceedings of the CSEE, 2025,45(20):8053-8067.

刘云.煤电“三改联动”技术综述及讨论[J].洁净煤技术, 2024, 30(增刊1):82-90.LU Yun. Overview and discussion of coal power“Three Reforms and Linkage” technology[J]. Clean Coal Technology, 2024, 30(Suppl.1):82-90.

牟春华,居文平,王洋,等.“双碳”目标下清洁高效灵活煤电技术现状及煤电前景展望[J].热力发电, 2023,52(9):1-10.MU Chunhua, JU Wenping, WANG Yang, et al. Techniques status and perspective of efficient-flexible coal fired power generation under carbon peak and neutrality targets[J].Thermal Power Generation, 2023, 52(9):1-10.

王建勋. 650 MW超临界机组低压缸零出力技术的灵活性调峰能力及经济性分析[J].热能动力工程, 2021,36(2):18-23.WANG Jianxun. Analysis of flexible peak-load regulation capability and economy on the zero output technology of low-pressure cylinder for 650 MW supercritical unit[J].Journal of Engineering for Thermal Energy and Power,2021, 36(2):18-23.

董伟,司派友,王维萌,等.高低压旁路供热改造对机组调峰能力的影响分析[J].热能动力工程, 2023,38(8):169-175.DONG Wei, SI Paiyou, WANG Weimeng, et al. Analysis of the influence of HP-LP bypass heat supply reformation on unit’s peak shaving capability[J]. Journal of Engineering for Thermal Energy and Power, 2023, 38(8):169-175.

杨坤,耿杰,刘迪,等.深度调峰下多种供热改造耦合的容量配置优化研究[J].热能动力工程, 2024, 39(9):123-133.YANG Kun, GENG Jie, LIU Di, et al. Optimization of capacity allocation for coupling of various heat supply transfor-mations under deep peak regulation[J]. Journal of Engineering for Thermal Energy and Power, 2024, 39(9):123-133.

严晓生,王小东,韩旭,等.耦合电锅炉和蓄热罐的热电机组供热能力提升[J].汽轮机技术, 2023, 65(1):57-60.YAN Xiaosheng, WANG Xiaodong, HAN Xu, et al.Improvement of heating capacity of thermoelectric units coupled with electric boilers and heat storage[J]. Turbine Technology, 2023, 65(1):57-60.

LIU M, ZHANG X W, MA Y G, et al. Thermo-economic analyses on a new conceptual system of waste heat recovery integrated with an S-CO2 cycle for coal-fired power plants[J].Energy Conversion and Management, 2018, 161:243-253.

XU C, LI X S, XU G, et al. Energy, exergy and economic analyses of a novel solar-lignite hybrid power generation process using lignite pre-drying[J]. Energy Conversion and Management, 2018, 170:19-33.

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