660 MW供热机组一次调频功能的完善及应用
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摘要
某660 MW超临界供热机组投运后,存在供热负荷大、电网频率波动频繁等问题,导致原逻辑控制下的一次调频合格率仅为50%左右。通过完善一次调频触发逻辑及改变动作初始值,提高了调频动作速度;通过设计供热运行模式下的滑压曲线、完善压力偏差及供热负荷动态补偿、进行汽轮机流量试验调整流量特性曲线等措施,完善了供热机组一次调频方案,实现了一次调频成功率高于85%的效果。
Due to the issues that came up after the commissioning of a 660 MW supercritical cogeneration unit, such as high heating load consumption and frequent frequency fluctuations, the passing rate of primary frequency control compensation only hover around50% under the original control logic. By means of completing the triggering logic and tuning the initial action value, the action speed of primary frequency compensation is improved. In addition, by working out the sliding pressure curve in heating operation mode,adjusting the dynamic compensations of pressure deviations and heating loads, in combination with the modifications of the flow characteristic curve through steam turbine flow testing, the improvement of primary frequency control logic is accomplished, which makes the target of passing rate of primary frequency control over 85% achieved.
Due to the issues that came up after the commissioning of a 660 MW supercritical cogeneration unit, such as high heating load consumption and frequent frequency fluctuations, the passing rate of primary frequency control compensation only hover around50% under the original control logic. By means of completing the triggering logic and tuning the initial action value, the action speed of primary frequency compensation is improved. In addition, by working out the sliding pressure curve in heating operation mode,adjusting the dynamic compensations of pressure deviations and heating loads, in combination with the modifications of the flow characteristic curve through steam turbine flow testing, the improvement of primary frequency control logic is accomplished, which makes the target of passing rate of primary frequency control over 85% achieved.
引文
[1]盛错,陈彦峰,周年光.一次调频设置问题引起机组甩负荷的实例及分析[J].中国电力,2017, 50(2):70-74.SHENG Kai, CHEN Yanfeng, ZHOU Nianguang. Case study on load rejection caused by configuration problems of primary frequency regulation[J]. Electric Power, 2017, 50(2):70-74.
[2]祁伟,路鹏,周杰,等.供热汽轮机一次调频负荷响应动态特性研究[J].汽轮机技术,2018, 60(4):303-306.QI Wei, LU Peng, ZHOU Jie, et al. Study on dynamic characteristics of load response to primary frequency modulation in cogeneration steam turbine[J]. Turbine Technology, 2018, 60(4):303-306.
[3]刘晓强,王西田.考虑主蒸汽压力变化的机组一次调频动态特性[J].热能动力工程,2008, 23(2):140-143.LIU Xiaoqiang,WANG Xitian. Dynamic characteristics of the primary frequency modulation of a turbo-generator under a due consideration of main steam pressure variation[J]. Journal of Engineering for Thermal Energy and Power, 2008, 23(2):140-143.
[4]刘鑫屏,田亮,王琪.补偿风电扰动的供热机组快速变负荷控制方法[J].电力系统自动化,2014, 38(6):26-32.LIU Xinping, TIAN Liang, WANG Qi. A control method of rapid load change for heat supply units compensating wind power disturbance[J]. Automation of Electric Power Systems, 2014, 38(6):26-32.
[5]王玮,孙阳,刘吉臻,等.适应电网快速调频的热电联产机组新型变负荷控制策略[J].电力系统自动化,2018, 42(21):63-69.WANG Wei,SUN Yang,LIU Jizhen,et al.Load-change control for combined heat and power units adapted to rapid frequency regulation of power grid[J]. Automation of Electric Power Systems,2018,42(21):63-69.
[6]蔡玲娟.大型供热机组协调运行与优化[J].上海电力学院学报,2018, 34(3):255-258.CAI Lingjuan. Coordinated operation and optimization of large heatsupply units[J]. Journal of Shanghai University of Electric Power,2018, 34(3):255-258.
[7]黄卫剑,张曦,陈世和,等.提高火电机组一次调频响应速度[J].中国电力,2011,44(1):73-77.HUANG Weijian, ZHANG Xi, CHEN Shihe, et al. Enhancing response speed of primary frequency regulation in thermal power unit[J]. Electric Power, 2011, 44(1):73-77.
[8]陈小强,项谨,魏路平.1000 MW机组一次调频性能优化[J].中国电力,2010, 43(4):63-66.CHEN Xiaoqiang, XIANG Jin, WEI Luping. Performance optimization study on primary frequency regulation of 1 000 MW units[J]. Electric Power, 2010, 43(4):63-66.
[9]王刚,郝涛,张江南,等.火电机组一次调频合格率的影响因素分析[J].中国电力,2014, 47(2):23-26.WANG Gang, HAO Tao, ZHANG Jiangnan, et al. Analysis on influencing factors of passing rate of primary frequency regulation of thermal power units[J]. Electric Power, 2014, 47(2):23-26.
[10]杨军统,吴泽刚.超超临界机组一次调频控制策略的优化[J].热力发电,2013, 42(5):83-86.YANG Juntong, WU Zegang. Control strategy optimization of primary frequency regulation for ultra supercritical units[J]. Thermal Power Generation, 2013, 42(5):83-86.
[11]龚雪丽.电厂一次调频控制策略的分析及优化[J].电力建设,2005, 26(9):6-8.GONG Xueli. Analysis and optimization on control strategy of primary frequency regulation in power plants[J]. Electric Power Construction,2005, 26(9):6-8.
[12]杨振勇,李卫华,骆意.火力发电机组一次调频问题研究[J].华北电力技术,2008, 38(1):16-20.YANG Zhenyong, LI Weihua, LUO Yi. Research on primary frequency for thermal power generating units[J]. North China Electric Power, 2008, 38(1):16-20.
[13]马素霞,马庆中,张龙英.中间再热机组一次调频特性研究[J].热能动力工程,2010, 25(1):72-76.MA Suxia, MA Qingzhong, ZHANG Longying. Study of the primary frequency modulation characteristics of an intermediate reheat unit[J]. Journal of Engineering for Thermal Energy and Power, 2010,25(1):72-76.
[14]刘吉臻,邓拓宇,田亮.供热机组协调控制对象非线性特性分析[J].华北电力大学学报,2016,43(2):66-72.LIU Jizhen, DENG Tuoyu, TIAN Liang. Analysis of nonlinear characteristics of heat supply unit's coordinated control object[J].Journal of North China Electric Power University, 2016,43(2):66-72.
[15]朱剑英.330 MW供热机组AGC和一次调频控制策略分析及优化[J].电力与能源,2012, 33(3):227-231.ZHU Jianying. Analysis and optimization of AGC and primary frequency control strategy for 330 MW heating unit[J]. Power&Energy, 2012, 33(3):227-231.
[16]王建强,郑渭建,童小忠,等.基于热网蓄热提升机组AGC、一次调频品质的试验研究[J].中国电力,2014, 47(9):1-5.WANG Jianqiang, ZHENG Weijian, TONG Xiaozhong, et al.Experimental study on enhancing the quality of AGC and primary frequency regulation based on heat system accumulation[J]. Electric Power,2014,47(9):1-5.
[17]文乐,杨新民,王伟峰.抽汽供热机组滑压压力优化计算[J].热力发电,2017, 46(10):71-75.WEN Le, YANG Xinmin, WANG Weifeng. Optimization calculation for sliding pressure of steam turbine with extraction for heating[J].Thermal Power Generation, 2017, 46(10):71-75.
[18]万杰,许天宁,李泽,等.热电联产机组抽汽供热期的汽轮机滑压运行优化方法[J].节能技术,2015, 33(1):33-36.WAN Jie, XU Tianning, LI Ze, et al. Turbines sliding pressure operation optimization for cogeneration unit during in the period of steam extraction for heating[J]. Energy Conservation Technology,2015, 33(1):33-36.
[19]郝欣,王英荟,于学丽.机组一次调频控制算法设计与实现[J].热力发电,2013, 42(8):131-134.HAO Xin, WANG Yinghui, YU Xueli. Rule based primary frequency regulation algorithm:design and implementation[J].Thermal Power Generation, 2013, 42(8):131-134.
[2]祁伟,路鹏,周杰,等.供热汽轮机一次调频负荷响应动态特性研究[J].汽轮机技术,2018, 60(4):303-306.QI Wei, LU Peng, ZHOU Jie, et al. Study on dynamic characteristics of load response to primary frequency modulation in cogeneration steam turbine[J]. Turbine Technology, 2018, 60(4):303-306.
[3]刘晓强,王西田.考虑主蒸汽压力变化的机组一次调频动态特性[J].热能动力工程,2008, 23(2):140-143.LIU Xiaoqiang,WANG Xitian. Dynamic characteristics of the primary frequency modulation of a turbo-generator under a due consideration of main steam pressure variation[J]. Journal of Engineering for Thermal Energy and Power, 2008, 23(2):140-143.
[4]刘鑫屏,田亮,王琪.补偿风电扰动的供热机组快速变负荷控制方法[J].电力系统自动化,2014, 38(6):26-32.LIU Xinping, TIAN Liang, WANG Qi. A control method of rapid load change for heat supply units compensating wind power disturbance[J]. Automation of Electric Power Systems, 2014, 38(6):26-32.
[5]王玮,孙阳,刘吉臻,等.适应电网快速调频的热电联产机组新型变负荷控制策略[J].电力系统自动化,2018, 42(21):63-69.WANG Wei,SUN Yang,LIU Jizhen,et al.Load-change control for combined heat and power units adapted to rapid frequency regulation of power grid[J]. Automation of Electric Power Systems,2018,42(21):63-69.
[6]蔡玲娟.大型供热机组协调运行与优化[J].上海电力学院学报,2018, 34(3):255-258.CAI Lingjuan. Coordinated operation and optimization of large heatsupply units[J]. Journal of Shanghai University of Electric Power,2018, 34(3):255-258.
[7]黄卫剑,张曦,陈世和,等.提高火电机组一次调频响应速度[J].中国电力,2011,44(1):73-77.HUANG Weijian, ZHANG Xi, CHEN Shihe, et al. Enhancing response speed of primary frequency regulation in thermal power unit[J]. Electric Power, 2011, 44(1):73-77.
[8]陈小强,项谨,魏路平.1000 MW机组一次调频性能优化[J].中国电力,2010, 43(4):63-66.CHEN Xiaoqiang, XIANG Jin, WEI Luping. Performance optimization study on primary frequency regulation of 1 000 MW units[J]. Electric Power, 2010, 43(4):63-66.
[9]王刚,郝涛,张江南,等.火电机组一次调频合格率的影响因素分析[J].中国电力,2014, 47(2):23-26.WANG Gang, HAO Tao, ZHANG Jiangnan, et al. Analysis on influencing factors of passing rate of primary frequency regulation of thermal power units[J]. Electric Power, 2014, 47(2):23-26.
[10]杨军统,吴泽刚.超超临界机组一次调频控制策略的优化[J].热力发电,2013, 42(5):83-86.YANG Juntong, WU Zegang. Control strategy optimization of primary frequency regulation for ultra supercritical units[J]. Thermal Power Generation, 2013, 42(5):83-86.
[11]龚雪丽.电厂一次调频控制策略的分析及优化[J].电力建设,2005, 26(9):6-8.GONG Xueli. Analysis and optimization on control strategy of primary frequency regulation in power plants[J]. Electric Power Construction,2005, 26(9):6-8.
[12]杨振勇,李卫华,骆意.火力发电机组一次调频问题研究[J].华北电力技术,2008, 38(1):16-20.YANG Zhenyong, LI Weihua, LUO Yi. Research on primary frequency for thermal power generating units[J]. North China Electric Power, 2008, 38(1):16-20.
[13]马素霞,马庆中,张龙英.中间再热机组一次调频特性研究[J].热能动力工程,2010, 25(1):72-76.MA Suxia, MA Qingzhong, ZHANG Longying. Study of the primary frequency modulation characteristics of an intermediate reheat unit[J]. Journal of Engineering for Thermal Energy and Power, 2010,25(1):72-76.
[14]刘吉臻,邓拓宇,田亮.供热机组协调控制对象非线性特性分析[J].华北电力大学学报,2016,43(2):66-72.LIU Jizhen, DENG Tuoyu, TIAN Liang. Analysis of nonlinear characteristics of heat supply unit's coordinated control object[J].Journal of North China Electric Power University, 2016,43(2):66-72.
[15]朱剑英.330 MW供热机组AGC和一次调频控制策略分析及优化[J].电力与能源,2012, 33(3):227-231.ZHU Jianying. Analysis and optimization of AGC and primary frequency control strategy for 330 MW heating unit[J]. Power&Energy, 2012, 33(3):227-231.
[16]王建强,郑渭建,童小忠,等.基于热网蓄热提升机组AGC、一次调频品质的试验研究[J].中国电力,2014, 47(9):1-5.WANG Jianqiang, ZHENG Weijian, TONG Xiaozhong, et al.Experimental study on enhancing the quality of AGC and primary frequency regulation based on heat system accumulation[J]. Electric Power,2014,47(9):1-5.
[17]文乐,杨新民,王伟峰.抽汽供热机组滑压压力优化计算[J].热力发电,2017, 46(10):71-75.WEN Le, YANG Xinmin, WANG Weifeng. Optimization calculation for sliding pressure of steam turbine with extraction for heating[J].Thermal Power Generation, 2017, 46(10):71-75.
[18]万杰,许天宁,李泽,等.热电联产机组抽汽供热期的汽轮机滑压运行优化方法[J].节能技术,2015, 33(1):33-36.WAN Jie, XU Tianning, LI Ze, et al. Turbines sliding pressure operation optimization for cogeneration unit during in the period of steam extraction for heating[J]. Energy Conservation Technology,2015, 33(1):33-36.
[19]郝欣,王英荟,于学丽.机组一次调频控制算法设计与实现[J].热力发电,2013, 42(8):131-134.HAO Xin, WANG Yinghui, YU Xueli. Rule based primary frequency regulation algorithm:design and implementation[J].Thermal Power Generation, 2013, 42(8):131-134.