高背压双抽热电联产机组联合运行特性及负荷分配  

Operation Characteristics and Load Distribution of CHP Units with Extraction-Condensate and Extraction-High Back Pressure Mode

作　　者：刘学 胡刚刚[2] 李健[2] 杨志平[2] 王宁玲[2] 戈志华[2] LIU Xue;HU Ganggang;LI Jian;YANG Zhiping;WANG Ningling;GE Zhihua(Huadian Heavy Industries Co.,Ltd.,Beijing 100070,China;National Thermal Power Engineering Technology Research Center,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华电重工股份有限公司,北京100070 [2]华北电力大学国家火力发电工程技术研究中心,北京102206

出　　处：《中国电力》2022年第10期219-228,共10页Electric Power

基　　金：国家重点研发计划资助项目(2020YFB0606202)。

摘　　要：大型汽轮机组采用高背压方式进行供热能够尽可能多利用排汽余热,节能效果显著,在热负荷允许的条件下,已成为越来越多火电厂供热改造的首选。针对某电厂2×330 MW高背压抽汽热电联产机组进行建模,分析其理论供热能力,结合热网供回水温度分析其调峰能力与经济性投运条件,研究了采用抽凝-抽背方式(EC-EHBP)、双抽凝方式(EC-EC)运行时的抽汽与负荷分配问题,确定了抽汽分配和电负荷分配原则,明确了不同环境温度下的背压运行方式。研究结果对电厂实际运行具有指导意义。The application of high back pressure turbine in large capacity coal-fired plants can make use of exhaust waste heat as much as possible to save fuel remarkably, which has become the first choice for heating renovation of thermal power plants if the heat load demand can be met. In this paper, the model is developed for a power plant with 2 × 330 MW high back pressure and extraction combined heat and power(CHP) units to analyze the theoretical heating capacity. Considering the supply and return water temperature of the heat supply network, peak shaving capacity and economic operation conditions are also analyzed. The steam extraction distribution and load distribution problems are studied for the operation of extraction condensate-extraction high back pressure(EC-EHBP) mode and double extraction condensate(EC-EC) mode, respectively. Principles of steam extraction distribution and electric load distribution are obtained and the back pressure operation mode is also determined under different ambient temperatures. The research results can provide theoretical guidance for the actual operation of CHP power plants.

关 键 词：高背压 热电联产 经济性运行 抽汽分配 负荷分配 

分 类 号：TM621[电气工程—电力系统及自动化]