基于工质焓值的核电机组模型一、二回路传递功率计算方法
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摘要
针对现有电力系统稳定计算中核电机组模型一、二回路系统之间传递功率难以准确计算的问题,利用核汽轮机饱和湿蒸汽的特点,基于工质焓降原理,提出一种一、二回路系统模型之间的接口方法。通过拟合主蒸汽及给水的比焓,同时考虑旁排与机组热效率,采用计算单位时间内焓降的办法,实现了对核蒸汽供应系统与原动机间传递功率的准确模拟,克服了现有简单套用火电汽轮机入口功率计算方法造成模型动态误差过大的缺陷,提升了核电模型的仿真精度。全范围仿真结果表明,该方法可较为准确地反映核电机组一、二回路间功率变化的动态过程,为研究核电机组与电网之间的相互影响和协调控制提供了技术支撑。
To solve the problem that the transfer power between primary and secondary systems of nuclear power unit models cannot be accurately calculated in power system stability analysis, a new method is proposed using enthalpy drop of wet saturated steam flow in the turbines. The enthalpy drop per unit time in steam generator, combined with thermal efficiency and fitting curves of the enthalpy of main steam and feed water, is used to simulate the power transfer between nuclear steam supply system and prime mover. It improves dynamic simulation accuracy of the nuclear power unit model. The full scope simulation results of the reference nuclear power unit show that the dynamic transfer process can be accurately calculated. It can be used for analyzing interaction and coordination between nuclear power units and power systems.
To solve the problem that the transfer power between primary and secondary systems of nuclear power unit models cannot be accurately calculated in power system stability analysis, a new method is proposed using enthalpy drop of wet saturated steam flow in the turbines. The enthalpy drop per unit time in steam generator, combined with thermal efficiency and fitting curves of the enthalpy of main steam and feed water, is used to simulate the power transfer between nuclear steam supply system and prime mover. It improves dynamic simulation accuracy of the nuclear power unit model. The full scope simulation results of the reference nuclear power unit show that the dynamic transfer process can be accurately calculated. It can be used for analyzing interaction and coordination between nuclear power units and power systems.
引文
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[14]能源部电力科学研究院,能源部苏州热工研究所等.大型核电站对电力系统安全稳定运行影响的研究[R].1992.
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[16]周修铭,干福麟,衷文华,等.适用于分析大扰动下机网相互影响的压水堆核电站数学模型研究[J].核动力工程,1996,17(1):6-12.Zhou Xiu ming,Gan Fulin,Zhong Wenhua.Study of mathematical model of PWR nuclear power plant suitable for analyzing the interaction between unit and grid under serious disturbance[J].Nuclear Power Engineering.1996,17(1):6-12(in Chinese).
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[18]晁晖,于大海,夏潮.核电机组原动机调节系统实测建模与仿真研究[J].中国电机工程学报,2015,35(2):368-374.Chao Hui,Yu Dahai,Xia Chao.Modeling test and simulation of prime mover and governor for nuclear power plant[J].Proceedings of the CSEE,2015,35(2):368-374(in Chinese).
[19]刘庆,吴国旸,宋新立,等.适用于电网稳定分析的大容量核电机组建模[J].电网技术,2017,41(3):907-914.Liu Qing,Wu Guoyang,Song Xinli,et al.Modeling of large-capacity nuclear power unit suitable for power grid stability analysis[J].Power System Technology,2017,41(3):907-914(in Chinese).
[20]吴国旸,宋新立,仲悟之,等.大型压水堆核电机组建模研究[J].电力科学与技术,2012,27(2):31-36.Wu Guoyang,Song Xinli,Zhong Wuzhi,et al.Modeling research on large pressurized water rector nuclear power plant[J].Journal of Electric Power Science and Technology,2012,27(2):31-36(in Chinese).
[21]苏志达.火电机组在孤网运行时网源协调策略的仿真研究[D].北京:华北电力大学,2014.
[2]国务院.能源发展战略行动计划2014-2020[Z].2014.
[3]陈森.核电站仿真系统开发项目管理研究[D].武汉:华中科技大学,2006.
[4]Kerlin T W,Katz E M.Pressurized water reactor modeling for long term power system dynamics simulation[R].University of Tennessee,Knoxville,Tennessee,EPRI EL-3087,1983.
[5]Di Lascio M A,Moret R,Poloujasoff M.Reduction of program size for long-term power system simulation with pressurized water reactor[J].IEEE Transactions on Power Apparatus and System,1983,PAS-103(3):745-751.
[6]高慧敏.核电站与抽水蓄能电站的数学建模及联合运行研究[D].杭州:浙江大学,2006.
[7]吴萍,刘涤尘,曾正,等.压水堆核电厂堆芯负荷跟踪实现及其物理过程分析[C]//中国高校电力系统及其自动化专业第25届学术年会.长沙:长沙理工大学,2009.
[8]施希,赵遵廉,刘涤尘.基于PSASP的核反应堆模型数学模型及其动态相应特性[J].电网技术,2010,34(5):55-59.Shi Xi,Zhao Zunlian,Liu Dichen.A mathematical model of nuclear power reactor and its dynamic response based on power system analysis software package[J].Power System Technology,2010,34(5):55-59(in Chinese).
[9]曾正,刘涤尘,赵荣祥,等.基于反应堆堆芯非线性模型的核电机组动态行为分析[J].电网技术,2010,34(12):80-84.Zeng Zheng,Liu Dichen,Zhao Rongxiang,et al.Nonlinear reactor model-based analysis on dynamic behavior of power grid with grid-connected nuclear power generation unit[J].Power System Technology,2010,34(12):80-84(in Chinese).
[10]赵洁,刘涤尘,吴耀文.压水堆核电厂接入电力系统建模[J].中国电机工程学报,2009,29(31):8-13.Zhao Jie,Liu Dichen,Wu Yaowen.Modeling of pressurized water reactor nuclear power plant integrated into power system simulation[J].Proceedings of the CSEE,2009,29(31):8-13(in Chinese).
[11]Shi Xi,Liu Dichen,Wu Ping.Modeling and dynamic analysis of nuclear power plant reactor based on PSASP[C]//2009 Asia-Pacific Power and Energy Engineering Conference,APPEEC2009.Wuhan,China:IEEE,2009.
[12]Xiong Li,Liu Dichen,Shi Xi,et al.Research and Analysis for Pressurized Water Reactor Plant into Power System Dynamics Simulation[C]//2009 Asia-Pacific Power and Energy Engineering Conference,APPEEC2009.Wuhan,China:IEEE,2009.
[13]张学成.用于电力系统动态模拟的压水堆核电站数学模型[J].电网技术,1990,14(4):71-77.Zhang Xuecheng.Pressurized water reactor nuclear power plant model for power system dynamic simulation[J].Power System Technology,1990,14(4):71-77(in Chinese).
[14]能源部电力科学研究院,能源部苏州热工研究所等.大型核电站对电力系统安全稳定运行影响的研究[R].1992.
[15]张学成,胡学浩,周修铭,等.具有核电模型的中期动态模拟程序开发及大型核电站与电力系统相互影响的研究[J].电网技术,1995,19(2):5-10.Zhang Xuecheng,Hu Xuehao,Zhou Xiuming,et al.Development of midterm dynamic simulation program including nuclear power plant model and study of interaction between nuclear power plant and power system[J].Power System Technology,1995,19(2):5-10(in Chinese).
[16]周修铭,干福麟,衷文华,等.适用于分析大扰动下机网相互影响的压水堆核电站数学模型研究[J].核动力工程,1996,17(1):6-12.Zhou Xiu ming,Gan Fulin,Zhong Wenhua.Study of mathematical model of PWR nuclear power plant suitable for analyzing the interaction between unit and grid under serious disturbance[J].Nuclear Power Engineering.1996,17(1):6-12(in Chinese).
[17]Hu Xuehao,Zheng Xuecheng.Pressurized water reactor Nuclear Power Plant(NPP)modeling and the midterm dynamic simulation after NPP has been Introduced into power system[C]//IEEETENCON’93.Beijing,China:IEEE,1993.
[18]晁晖,于大海,夏潮.核电机组原动机调节系统实测建模与仿真研究[J].中国电机工程学报,2015,35(2):368-374.Chao Hui,Yu Dahai,Xia Chao.Modeling test and simulation of prime mover and governor for nuclear power plant[J].Proceedings of the CSEE,2015,35(2):368-374(in Chinese).
[19]刘庆,吴国旸,宋新立,等.适用于电网稳定分析的大容量核电机组建模[J].电网技术,2017,41(3):907-914.Liu Qing,Wu Guoyang,Song Xinli,et al.Modeling of large-capacity nuclear power unit suitable for power grid stability analysis[J].Power System Technology,2017,41(3):907-914(in Chinese).
[20]吴国旸,宋新立,仲悟之,等.大型压水堆核电机组建模研究[J].电力科学与技术,2012,27(2):31-36.Wu Guoyang,Song Xinli,Zhong Wuzhi,et al.Modeling research on large pressurized water rector nuclear power plant[J].Journal of Electric Power Science and Technology,2012,27(2):31-36(in Chinese).
[21]苏志达.火电机组在孤网运行时网源协调策略的仿真研究[D].北京:华北电力大学,2014.