范志强,张洁,魏超,张利慧,杨彦平
FAN Zhiqiang,ZHANG Jie,WEI Chao,ZHANG Lihui,YANG Yanping

• 1:内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司
• 2:内蒙古电力(集团)有限责任公司呼和浩特供电分公司

摘要(Abstract)：

以内蒙古某电厂2×200 MW、2×350 MW四台供热机组为研究对象，从厂级经济性和调峰性能角度出发，分析低压缸零出力、光轴、高背压改造三种供热技术对厂级净效益及调峰性能的影响。基于Ebsilon软件搭建四台供热机组改造前后的数学模型，分析低压缸零出力技术、高背压改造技术对单台机组经济性能和调峰性能的影响。在四种厂级供热方式下分析厂级的经济性能和调峰能力及机组背压、疏水温度、供热压力对各机组最小出力负荷的影响。研究得出，供热量相同时，低压缸零出力改造可使机组最小出力下降33 MW，高背压改造可使机组最小出力降低80 MW；四台机组供热改造后（1、3号机组切缸改造、2号机组光轴改造、4号机组高背压改造）厂级深度调峰能力最优；厂级供热负荷低于1000 MW时，四台机组经供热改造后运行经济性最优，供热负荷高于1000 MW时，四台机组按原抽凝供热运行经济性最优；供热压力对各机组调峰性能影响最大。
Taking the four heating units of 2×200 MW and 2×350 MW in a power plant in Inner Mongolia as the object,this paper analyzes the effects of three heating technologies, namely zero output of low pressure cylinder, optical shaft and high back pressure transformation on the net benefit and peak regulating performance of the plant from the perspective of plant economy and peak regulating performance. Based on Ebsilon software, the mathematical models of four heating units before and after the transformation are built, and the influences of low-pressure cylinder zero output technology and high back pressure transformation technology on the economic performance and peak regulating performance of a single unit are analyzed. Four kinds of plant level heating methods are put forward, and the economic performance and peak regulating ability of plant level under different heating methods are analyzed. The effects of back pressure, drain temperature and heating pressure on the minimum output load of each unit are studied. The results show that when the heat load is the same, the minimum output of low pressure cylinder can be reduced by 33 MW, and the minimum output of high back pressure can be reduced by 80 MW. After the heat supply transformation of four units(cutting cylinder transformation of Unit 1 and 3, optical shaft transformation of Unit 2, high back pressure transformation of Unit 4), the plant depth peak regulating ability is optimal. When the plant heating load is lower than 1000 MW, the operation economy of the four units is the best after heating transformation. When the heating load is higher than 1000 MW, the operation economy of the four units is the best according to the original pumping heating load. Heating pressure has the greatest influence on the peak regulating performance of each unit.

关键词(KeyWords)： 供热机组;低压缸零出力;高背压;深度调峰
heating unit;low pressure cylinder zero output;high back pressure;depth peaking

Abstract:

Keywords:

基金项目(Foundation): 内蒙古电力（集团）有限责任公司科技项目“内蒙古电网供热机组调峰能力分析及软件开发”（2022-25）

作者(Author): 范志强,张洁,魏超,张利慧,杨彦平
FAN Zhiqiang,ZHANG Jie,WEI Chao,ZHANG Lihui,YANG Yanping

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