【摘要】 以供工业蒸汽热电联产机组为研究对象，建立了蒸汽管网动态模型，研究了蒸汽管网辅助热电联产机组调频的调频能力，进而分析了不同工况下蒸汽管网的蓄(火用)等效转化率。结果表明：在抽汽阀门完全关闭30 s时，用户侧压力达到下限值，额外累计发电量达到307 kW·h;在阀门完全关闭后，机组负荷为700 MW、900 MW和1 000 MW时，蒸汽管网蓄(火用)等效转化率分别为84.6%、82.8%和81.5%;抽汽阀门动作越快，机组输出功率上升越快，阀门在5 s关闭时机组输出功率爬升率最大值为9.77 MW/s;蒸汽管网辅助热电联产机组参与调频能有效提升机组的变负荷速率，增强机组的运行灵活性。更多还原

【Abstract】 Taking the combined heat and power(CHP) supplying industrial steam as the research object, the dynamic model of the steam pipe network was developed. Then, the frequency regulation capability of CHP unit assisted with steam distribution system was studied. The exergy storage equivalent conversion rate of steam distribution system under different operating conditions was analyzed. Results show that, when the extraction valve is kept closing for 30 s, the user side steam pressure reaches the lower limit value, and the additional cumulative power generation is 307 kW·h. When the extraction valve is totally closed, the exergy storage equivalent conversion rate is 84.6%, 82.8% and 81.5% as the power load of CHP unit is 700 MW, 900 MW and 1 000 MW,respectively. The faster the action of the extraction valve is, the faster the CHP plant power rises. When the valve closing time is 5 s, the maximum CHP plant power climbing rate is 9.77 MW/s. The variable load rate increases when the CHP unit assisted steam distribution system in frequency regulation, and the operation flexibility of CHP unit can be enhanced.更多还原