宽负荷运行燃煤电站不同脱碳模式热经济性对比  

Comparison of the Thermo-economic Analysis of Different Decarbonisation Mode for Coal-fired Power Plants Operating Under Wide Load Operation

作　　者：马雲腾 许诚[1] 李林聪 辛团团 MA Yunteng;XU Cheng;LI Lincong;XIN Tuantuan(Key Laboratory of Power Station Energy Transfer Conversion and System of Ministry of Education,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学电站能量传递转化与系统教育部重点实验室,北京102206

出　　处：《动力工程学报》2024年第7期1137-1143,1152,共8页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(52176004);中央高校基本科研业务费专项资金资助项目(2023MS016)。

摘　　要：提出了3种不同发电功率和CO_(2)捕集率约束条件下的碳捕集燃煤电站脱碳运行模式,并对采用这3种脱碳运行模式下的某典型600 MW燃煤电站进行了热经济性分析,获得燃煤电站在不同应用场景(电价、煤价及碳税)下的最佳脱碳运行方法。结果表明:采用功率不变运行模式对燃煤电站的能耗惩罚最小,但不能在全工况满足严格碳捕集率的要求;对于功率降低模式和功率不变模式,当上网电价低于0.371元/(kW·h)或煤价高于758.94元/t时,采用功率降低模式的额外经济收益更高;当电价在0.371~0.407元/(kW·h)或煤价在682.45~758.94元/t时,需根据机组的运行负荷选择合适的运行模式,当电价高于0.407元/(kW·h)或煤价低于682.45元/t,且机组负荷低于93%时,功率不变模式具有较高的收益。Three different decarbonization operational modes for coal-fired power plant under various power outputs and CO_(2) capture rate constraints were proposed.A thermo-economic analysis was conducted on a typical 600 MW coal-fired power plant under these three decarbonization modes,so as to obtain the optimal decarbonization strategy for the power plant in varying scenarios of electricity prices,coal prices,and carbon taxes.Results show that constant power mode minimizes energy consumption penalties for the power plant,yet it fails to meet stringent CO_(2) capture requirements across all operating conditions.For the reduced power mode and constant power mode,when the grid electricity price falls below 0.371 yuan/(kW·h)or the coal price is below 682.45 yuan/t,the reduced power mode offers greater additional economic benefits.When electricity prices range is 0.371-0.407 yuan/(kW·h)or coal prices is between 682.45 and 758.94 yuan/t,the appropriate operating mode should be selected based on the unit's load.If the electricity price is higher than 0.407 yuan/(kW·h)or the coal price is below 682.45 yuan/t,and the unit load is below 93%,the constant power mode yields higher returns.

关 键 词：脱碳运行模式 宽负荷 热经济性 碳捕集 

分 类 号：TM621[电气工程—电力系统及自动化]