中国电力 ›› 2019, Vol. 52 ›› Issue (7): 108-116.DOI: 10.11930/j.issn.1004-9649.201804066

• 发电 • 上一篇    下一篇

太阳能辅助燃煤发电系统变工况动态特性分析

吕培鑫1, 庞力平1,2, 李明1, 段立强1,2, 杨勇平1,2   

  1. 1. 华北电力大学 能源动力与机械工程学院, 北京 102206;
    2. 华北电力大学 教育部电站设备状态监测与控制重点实验室, 北京 102206
  • 收稿日期:2018-04-16 修回日期:2018-12-27 出版日期:2019-07-05 发布日期:2019-07-13
  • 作者简介:吕培鑫(1995-),男,硕士研究生,从事太阳能辅助燃煤发电机组动态特性研究,E-mail:13260081964@163.com;庞力平(1968-),男,博士,教授,从事太阳能热发电方面研究,E-mail:plp@ncepu.edu.cn
  • 基金资助:
    国家重点基础研究发展计划资助项目(2015CB251505)。

Analysis on Dynamic Characteristics of Solar-aided Coal-Fired Power Generation System under Load Following

LV Peixin1, PANG Liping1,2, LI Ming1, DUAN Liqiang1,2, YANG Yongping1,2   

  1. 1. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;
    2. Key Laboratory of Power Plant Equipment Monitoring and Control of Ministry of Education, North China Electric Power University, Beijing 102206, China
  • Received:2018-04-16 Revised:2018-12-27 Online:2019-07-05 Published:2019-07-13
  • Supported by:
    This work is supported by National Major Fundamental Research Program of China (No.2015CB251505).

摘要: 针对某600 MW亚临界机组太阳能辅助燃煤发电系统,选择夏至日全天100%THA、75%THA、50%THA3个运行工况,使用TRNSYS瞬态模拟软件,在太阳辐射日变化的条件下,对接入太阳能辅助燃煤发电系统后机组运行的动态特性进行了模拟。结果显示,不同工况下太阳能辅助燃煤发电系统的运行受到太阳能辐照波动的影响,变工况下的系统主要参数变化与流量变化密切相关,太阳能系统运行时锅炉主蒸汽温度升高,烟温降低,压力降低,负荷越低光电转化效率越低。在变工况过程中太阳能接入锅炉会造成主汽温度的升高,必须采取动态喷水减温措施控制主蒸汽温度,维持太阳能侧和锅炉侧的换热平衡。

关键词: 太阳能, 燃煤发电, TRNSYS瞬态仿真软件, 变负荷, 动态特性

Abstract: Regarding a 600 MW sub-critical solar-aided coal-fired power generation unit, the transient simulation software TRNSYS is used to simulate its operating dynamic characteristics under 100%THA, 75%THA and 50%THA conditions on the summer solstice upon the introduction of the solar energy considering daily solar radiation changes. The results show that the operation of the solar-aided coal-fired power generation system under different operating conditions is affected by solar radiation fluctuations. The change of main parameters is closely related to the flow rate. Specifically, the main steam temperature will go higher with the main steam pressure and flue gas temperature down when the solar-aided system is in operation. The solar-electricity conversion efficiency of the solar-aided system will decrease with the load drop. During the load following process, the introduction of solar energy into boiler will cause main steam temperature to rise such that the dynamic water spray desuperheating measures must be taken to maintain main steam temperature and keep the heat exchange balance between the solar side and the boiler side.

Key words: solar thermal, coal-fired power generation, TRNSYS, load following, dynamic characteristics

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