燃气轮机联合循环热电联产供热供电量优化分配研究
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摘要
为研究燃气-蒸汽联合循环机组额定热电任务下的经济运行模式问题,本文运用模块化建模方法对机组各部件建模,基于以热定电的热电比关系,分析了4种供热负荷的5种运行模式的盈利能力。结果表明:纯发电情形下,不同运行模式之间的盈利差值最大值可达到6.04%;随着机组供热负荷的不断增大,与纯发电情况相比,好处归电法发电效率的变化趋势发生改变,不同运行模式间的盈利差值最大值1.52%出现在供热负荷1 388.89 GJ/h机组,几种模式盈利能力差别较小。建议在满足发电量、供热量的前提下,特别是在纯发电和高供热负荷情况下,机组尽可能以高电负荷与低电负荷组合的效率运行模式1运行。
In order to study the economic operation mode of gas-steam combined cycle units under the rated thermoelectric task, this paper uses the modular modeling method to build model for components of the unit.Moreover, based on the thermoelectric ratio of the heat-fixed electricity, the profitability of five operating modes at four heating loads was analyzed. The results show that, the maximum profit difference between different operating modes during pure power generation can reach 6.04%. With the continuous increase of the unit heating load, compared with the pure power generation situation, the benefits of normalization method of electrical power generation efficiency trends changes. The maximum profit difference between different operating modes is 1.52%,which appears when the heating load of the unit is 1 388.89 GJ/h, indicating there are few differences in profitability between each operating mode. On the premise of meeting the demands of power generation and heat supply, it is recommended that the unit be operated in an efficiency mode 1 combing high electricity load with low electricity load as much as possible, especially in the case of pure power generation and high heating load.
In order to study the economic operation mode of gas-steam combined cycle units under the rated thermoelectric task, this paper uses the modular modeling method to build model for components of the unit.Moreover, based on the thermoelectric ratio of the heat-fixed electricity, the profitability of five operating modes at four heating loads was analyzed. The results show that, the maximum profit difference between different operating modes during pure power generation can reach 6.04%. With the continuous increase of the unit heating load, compared with the pure power generation situation, the benefits of normalization method of electrical power generation efficiency trends changes. The maximum profit difference between different operating modes is 1.52%,which appears when the heating load of the unit is 1 388.89 GJ/h, indicating there are few differences in profitability between each operating mode. On the premise of meeting the demands of power generation and heat supply, it is recommended that the unit be operated in an efficiency mode 1 combing high electricity load with low electricity load as much as possible, especially in the case of pure power generation and high heating load.
引文
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[13]郑炯智,张国强,许彦平,等.顶底循环参数对燃气-蒸汽联合循环全工况性能影响分析[J].中国电机工程学报,2016,36(23):6418-6431.ZHENG Jiongzhi,ZHANG Guoqiang,XU Yanping,et al.Analysis of the influence of top and bottom circulation parameters on the full operating performance of gas-steam combined cycle[J].Proceedings of the CSEE,2016,36(23):6418-6431.
[14]STEINKE R J.STGSTK:a computer code for predicting multistage axial flow compressor performance by a meanline stage stacking method[R].NASA-TP-2020,1982.
[2]燃气-蒸汽联合循环简介[EB/OL].[2018-07-01].https://wenku.baidu.com/view/f30bb1214b35eefdc8d333db.html.Introduction to gas-steam combined cycle[EB/OL].[2018-07-01].https://wenku.baidu.com/view/f30bb1214b35eefdc8d333db.html.
[3]陈振山.燃气-蒸汽联合循环热电联产机组汽轮机运行模式转换控制的设计与实践[D].北京:华北电力大学,2015:33.CHEN Zhenshan.Design and practice of turbine operation mode conversion control for gas-steam combined cycle thermoelectric unit[D].Beijing:North China Electric Power University,2015:33.
[4]郭民臣,魏楠.热电厂供热成本分摊新方法——热耗变换系数法“好处归热法”的新解与理论证明[J].中国电机工程学报,2000,20(11):85-100.GUO Minchen,WEI Nan.A new approach to cost sharing for a cogeneration plant:method of heat rate transforma-tion coefficient[J].Proceedings of the CSEE,2000,20(11):85-100.
[5]庞乐,王宝玉,黄立彬.热、电负荷分配的经济效益分析[J].中国电力,2016,49(4):131-133.PANG Le,WANG Baoyu,HUANG Libin.Economic benefits analysis of heat and electricity load distribution[J].Electric Power,2016,49(4):131-133.
[6]熊昌全,汪正刚.燃气-蒸汽联合循环热电联产机组热电分摊方法[J].热力发电,2012,41(4):88-89.XIONG Changquan,WANG Zhenggang.Method of apportionment of heat and power for combined gas-steam cycle cogeneration units[J].Thermal Power Generation,2012,41(4):88-89.
[7]何青,罗宁.燃气蒸汽联合循环热电联产机组热经济性分析[J].热力发电,2018,47(5):49-56.HE Qing,LUO Ning.Thermal economy analysis of gas-steam combined cycle thermoelectric unit[J].Thermal Power Generation,2018,47(5):49-56.
[8]武小兵.大型联合循环热电联产系统的参数优化与性能分析[D].北京:清华大学,2005:46.WU Xiaobing.Parameter optimization and performance analysis of large combined cycle combined heat and power system[D].Beijing:Tsinghua University,2005:46.
[9]李丽萍,李丽君,程祖田.燃气-蒸汽联合循环供热机组运行模式及热经济性分析[J].电站系统工程,2012(6):52-54.LI Liping,LI Lijun,CHENG Zutian.Operation mode and thermal economy analysis of gas-steam combined cycle heating unit[J].Power System Engineering,2012(6):52-54.
[10]吴龙,袁奇,刘昕.供热机组热电负荷最佳分配方法分析[J].中国电机工程学报,2012,32(35):6-12.WU Long,YUAN Qi,LIU Xin.Research on the scheme of optimal load distribution for cogeneration units[J].Proceedings of the CSEE,2012,32(35):6-12.
[11]刘冰.V94.3A型燃气轮机系统建模与控制性能研究[D].上海:上海交通大学,2011:39.LIU Bing.Research on modeling and control performance of type V94.3A gas turbine system[D].Shanghai:Shanghai Jiao Tong University,2011:39.
[12]徐强,崔耀欣,张楹.V94.3A燃气轮机的技术分析[J].热力透平,2006,35(3):169-174.XU Qiang,CUI Yaoxin,ZHANG Ying.Technical analysis of V94.3A gas turbine[J].Thermal Turbine,2006,35(3):169-174.
[13]郑炯智,张国强,许彦平,等.顶底循环参数对燃气-蒸汽联合循环全工况性能影响分析[J].中国电机工程学报,2016,36(23):6418-6431.ZHENG Jiongzhi,ZHANG Guoqiang,XU Yanping,et al.Analysis of the influence of top and bottom circulation parameters on the full operating performance of gas-steam combined cycle[J].Proceedings of the CSEE,2016,36(23):6418-6431.
[14]STEINKE R J.STGSTK:a computer code for predicting multistage axial flow compressor performance by a meanline stage stacking method[R].NASA-TP-2020,1982.