中国电力 ›› 2021, Vol. 54 ›› Issue (5): 213-220.DOI: 10.11930/j.issn.1004-9649.202101053

• 发电 • 上一篇    

320 MW机组低压缸零出力性能分析及应用研究

刘双白1, 张晶2, 吴昕1, 胡娱欧2   

  1. 1. 国网冀北电力科学研究院(华北电力科学研究院有限责任公司),北京 100045;
    2. 国家电网公司华北分部,北京 100053
  • 收稿日期:2021-01-12 修回日期:2021-02-10 发布日期:2021-05-05
  • 作者简介:刘双白(1973-),男,高级工程师,从事电厂热力系统优化、节能方面的研究,E-mail:liusb1182@126.com;吴昕(1992-),男,通信作者,工程师,从事电厂热力系统优化、节能方面的研究,E-mail:274308390@qq.com
  • 基金资助:
    国家电网公司华北分部技术服务项目(火电机组灵活性改造技术评价研究,S20FW029)

Performance Analysis and Application Research of Low-Pressure Cylinder Zero Output Technology on 320 MW Unit

LIU Shuangbai1, ZHANG Jing2, WU Xin1, HU Yuou2   

  1. 1. State Grid Jibei Electric Power Research Institute (North China Electric Power Research Institute Co., Ltd.), Beijing 100045;
    2. North China Branch of State Grid Corporation of China, Beijing 100053
  • Received:2021-01-12 Revised:2021-02-10 Published:2021-05-05
  • Supported by:
    This work is supported by Technical Service Project of North China Branch of State Grid Corporation of China (Study on Evaluation of Flexibility Transformation Technology for Thermal Power Units, No.S20FW029)

摘要: 低压缸零出力技术可有效提升机组供热能力和调峰能力。针对某320 MW供热机组,采用Ebsilon软件计算分析了低压缸零出力方式供热性能,结果表明,采用低压缸零出力方式供热,机组最大供热抽汽量提升97%,在250 MW供热负荷下,供电煤耗可降低61 g/(kW·h);试验研究了机组低压缸零出力方式供热能力工况,实测得出,机组最大供热负荷可达到476 MW,最小电负荷可降至79.5 MW;基于上一年度供热期运行数据,对低压缸零出力方式供热的经济性进行了分析,结果显示,采用低压缸零出力方式供热可节约标准煤5 581 t。

关键词: 低压缸零出力, 热电联产, 供热量, 节能量

Abstract: Using low-pressure cylinder zero output technology can effectively improve the heating capacity and peak regulation capacity of the generation unit. In this paper, taking a 320 MW heating unit for example, firstly, Ebsilon software is used to calculate and analyze the heating performance of low-pressure cylinder zero output. The results show that the application of low-pressure cylinder zero output technology increased the maximum heating extraction steam flow of the unit by 97%, and reduced the net coal consumption by 61 g/(kW·h) at 250 MW heating load. Then, the test study on the heating capacity of low-pressure cylinder zero output mode of the unit was carried out. Field measurements show that the maximum heating load of the unit can reach as much as 476 MW, while the minimum electric load can be reduced to 79.5 MW. At last, based on the operation data of the heating season of previous year, the economic performance of low-pressure cylinder zero output mode is analyzed. The results show that using this heating mode can save 5581 t of standard coal equivalent.

Key words: low-pressure cylinder zero output, heat-electricity cogeneration, heating load, energy saving