供热机组提升供热能力和电调节能力技术
柳秀实¹，史敬杰²，林轶³，吕凯³
（1. 浙江浙能温州发电有限公司，浙江 温州 325602；2. 北方联合电力有限责任公司包头第二热电厂，内蒙古 包头 014030；
3. 西安热工研究院有限公司，陕西 西安 710054）
摘要： 供热机组实施旁路联合供热、低压缸零出力供热或旁路联合耦合低压缸零出力供热改造，均可实现供热能力
和电出力调节能力的有效提升，并在运行中可实现各个供热模式之间的灵活无扰切换。以一200 MW 供热机组为研究对
象，建立热力模型，研究4 种供热模式对提升机组供热能力和电出力调节能力的影响规律。结果表明：以抽汽供热模式
为对比基准，低压缸零出力供热、旁路联合供热、旁路联合耦合低压缸零出力供热改造方案的最大供热负荷分别提升了
19.2%，15.7%和35%；定供热量下的电出力调节能力分别提升了18.4%，27.1%和40.8%；定电出力下的供热煤耗分别提
升了-2.05 kg/GJ，9.24 kg/GJ和5.62 kg/GJ。建议供热机组根据自身实际情况及电网调峰政策选择最适合的改造方案。
关键词： 供热机组；灵活无扰切换；供热能力；电出力调节能力；定电出力下的供热煤耗
中图分类号： TK172     文献标识码： A     文章编号： 2095-0802-(2021)05-0060-05
Technology of Heating and Power-output Regulating Capacity Elevating for Cogeneration Units
LIU Xiushi1, SHI Jingjie2, LIN Yi3, LYU Kai3
(1. Zheneng Wenzhou Power Generation Co., Ltd. of Zhejiang, Wenzhou 325602, Zhejiang, China; 2. No.2 Thermal Power Plant
of Baotou,North United Power Co., Ltd., Baotou 014030, Inner Mongolia, China; 3. Xi'an Thermal Power Research Institute Co.,
Ltd., Xi'an 710054, Shaanxi, China)
Abstract: The technology of bypass heating system of high and medium pressure cylinder, the zero-output heating retrofit of
low-pressure cylinder and HP-LP bypass system coupling with zero-output heating retrofit of low-pressure cylinder can elevate
the heating and power-output regulating capacity for cogeneration units. Meanwhile, flexible and seamless switching between the
four heating modes can be realized. Taking a 200 MW heating unit as the research object, a thermal model was established to study
the influence law of heating and power-output regulating capacity elevation for this four heating modes. The results show that
compared with communicating pipe extraction mode, the maximum heating load of the zero-output heating retrofit of low-pressure
cylinder, the technology of bypass heating system of high and medium pressure cylinder and HP-LP bypass system coupling with
zero-output heating retrofit of low-pressure cylinder increased 19.2%, 15.7% and 35% respectively; power-output regulating capacity
for fixed heat-load increased 18.4%, 27.1% and 40.8% respectively, coal consumption for heating under fixed power output
increased -2.05 kg/GJ, 9.24 kg/GJ and 5.62 kg/GJ respectively. It is recommended that the most suitable transformation technology
for cogeneration unit should be put forward according to its own actual situation and local power grid peak regulation policy.

Key words: cogeneration units; flexible and seamless switch; heating capacity; power-output regulating capacity; coal consumption
for heating under fixed power output