660 MW汽轮发电机失磁后稳态异步运行过程分析
|
摘要
某电厂660 MW汽轮发电机因失磁故障进入稳定异步运行,发电机的机端参数和阻抗轨迹呈现有规律的振荡。分析了事故中发电机失磁后进入异步运行的过程。并针对这起事故,采用Matlab建立仿真模型,研究了大型火电机组中励磁回路的结构、发电机失磁前所带的负载、发电机的转动惯量以及发电机铁芯的空载特性4个因素对发电机失磁过程的影响。仿真结果和实际案例较为一致,说明了仿真模型的正确性。仿真结果对大型发电机组的失磁保护有一定的参考意义。
A 660 MW turbine generator entered a stable asynchronous running state due to loss of excitation and the generator's parameters and impedance trajectories showed regular oscillations. This paper analyzes the above process. According to the accident, a simulation model is built using Matlab to study the influence of the four factors on the process of loss of excitation, including the structure of the excitation circuit, the load before loss of excitation, the moment of inertia of the generator, and the no-load characteristic of the iron core in large-scale thermal power generating unit. The simulation results are in good agreement with those from actual case, and the correctness of the simulation model is illustrated. Simulation results have some reference significance for the loss of excitation protection of large generating units.
A 660 MW turbine generator entered a stable asynchronous running state due to loss of excitation and the generator's parameters and impedance trajectories showed regular oscillations. This paper analyzes the above process. According to the accident, a simulation model is built using Matlab to study the influence of the four factors on the process of loss of excitation, including the structure of the excitation circuit, the load before loss of excitation, the moment of inertia of the generator, and the no-load characteristic of the iron core in large-scale thermal power generating unit. The simulation results are in good agreement with those from actual case, and the correctness of the simulation model is illustrated. Simulation results have some reference significance for the loss of excitation protection of large generating units.
引文
[1]林莉,张向伍,郭文宇,等.同步发电机失磁过程分析与保护方法研究[J].高电压技术,2014,40(11):3544-3553.LIN Li,ZHANG Xiangwu,GUO Wenyu,et al.Analysis on loss-of-excitation process and research on protection method of synchronous generators[J].High Voltage Engineering,2014,40(11):3544-3553.
[2]国家能源局.大型发电机变压器继电保护整定计算导则:DL/T 684-2012[S].北京:中国电力出版社,2012.National Energy Commission.Guide of calculating settings of relay protection for large generator and transformer:DL/T 684-2012[S].Beijing:China Electric Power Press,2012.
[3]IEEE Power Engineering Society.IEEE guide for ACgenerator protection:IEEE Std C37.102-2006[S].
[4]汪静,余高旺.华东电网并网机组涉网保护相关标准及核查问题分析[J].电力工程技术,2017,36(5):66-70.WANG Jing,YU Gaowang.Analysis of related standards and verification problems of grid-related generator protection in state grid east china branch[J].Electric Power Engineering Technology,2017,36(5):66-70.
[5]王维俭,桂林,王雷,等.发电机失磁保护阻抗元件定值整定的再讨论[J].电力自动化设备,2009,29(12):1-3.WANG Weijian,GUI Lin,WANG Lei,et al.Re-discussion of setting calculation for impedance of generator loss-of-excitation protection[J].Electric Power Automation Equipment,2009,29(12):1-3.
[6]隋佳音,毕天姝,薛安成,等.新型发电机失磁保护加速判据研究[J].电力系统保护与控制,2010,38(20):69-73.SUI Jiayin,BI Tianshu,XUE Ancheng,et al.A novel accelerated criterion for loss of field protection[J].Power System Protection and Control,2010,38(20):69-73.
[7]高兴泉,王立国.基于SIMULINK/SIMSCAPE的计算机控制系统仿真实验平台[J].实验技术与管理,2013,30(9):88-92.GAO Xingquan,WANG Liguo.Simulation experiment platform for computer control system based on SIMULINK/SIMSCAPE[J].Experimental Technology and Management,2013,30(9):88-92.
[8]张旭东.不同原理的发电机失磁保护误动分析与改进[J].电力系统自动化,2001,25(6):63-65.ZHANG Xudong.Analysis of mis-operation of protection for loss of excitation and its improvement[J].Automation of Electric Power Systems,2001,25(6):63-65.
[9]刘桂林,宋玮,宋新立.基于涉网保护的低励限制、失磁保护与失步保护配合的研究[J].电力系统保护与控制,2014,42(23):107-112.LIU Guilin,SONG Wei,SONG Xinli.Research on coordination of low excitation limit,loss of excitation and out-of-step protection based on grid-related protection[J].Power System Protection and Control,2014,42(23):107-112.
[10]樊波,牛天林,薛钧义.基于MATLAB的发电机失磁故障仿真研究[J].电气技术,2007,4(2):60-63.FAN Bo,NIU Tianlin,XUE Junyi.The simulation research of generator loss-of-excitation faults based on MATLAB[J].Electrical Engineering,2007,4(2):60-63.
[11]王道元,徐余法,梁旭彪,等.百万千瓦汽轮发电机失磁动态过程仿真分析[J].电机技术,2015(5):1-4.WANG Daoyuan,XU Yufa,LIANG Xubiao,et al.Simulation on excitation-loss dynamic characteristic of the 1000 MW turbo-generator[J].Electrical Machinery Technology,2015(5):1-4.
[12]王维俭,侯炳蕴.大型机组继电保护理论基础[M].2版.北京:水利电力出版社,1989.
[13]殷建刚,彭丰.发电机失磁保护的典型配置方案[J].继电器,2002,30(3):33-36.YIN Jiangang,PENG Feng.Research on the typical configure of generator loss of field protection[J].Relay,2002,30(3):33-36.
[14]解兵,徐珂,刘建坤,等.励磁调节器低励限制整定原则和整定方法研究[J].电力系统保护与控制,2018,46(8):142-147.XIE Bing,XU Ke,LIU Jiankun,et al.Study on the principle and setting method of low excitation limit setting for excitation regulator[J].Power System Protection and Control,2018,46(8):142-147.
[15]郑涛,余青蔚,詹荣荣,等.调相机接入对发电机失磁保护的影响[J].电力系统保护与控制,2018,46(4):50-56.ZHENG Tao,YU Qingwei,ZHAN Rongrong,et al.Impact of synchronous condenser access on generator loss of excitation protection[J].Power System Protection and Control,2018,46(4):50-56.
[16]闵勇,陈磊,姜齐荣.电力系统稳定分析[M].北京:清华大学出版社,2016.
[17]何青,李国庆,王立健,等.汽轮发电机功率-负荷不平衡保护仿真分析[J].热力发电,2018,47(11):102-108.HE Qing,LI Guoqing,WANG Lijian,et al.Simulation of power-load unbalanced protection for turbo-generator[J].Thermal Power Generation,2018,47(11):102-108.
[18]严伟,陈俊,沈全荣.大型隐极发电机进相运行的探讨[J].电力系统自动化,2007,31(2):94-97.YAN Wei,CHEN Jun,SHEN Quanrong.Discussion on large non salient pole generator phase advancement operation[J].Automation of Electric Power Systems,2007,31(2):94-97.
[19]高志远,曹阳,徐昊亮,等.电力系统关键技术发展刍议[J].电力系统保护与控制,2017,45(17):14-17.GAO Zhiyuan,CAO Yang,XU Haoliang,et al.Primary discussion on the key technologies development of power system[J].Power System Protection and Control,2017,45(17):14-17.
[20]汪耕,李希明.大型汽轮发电机设计、制造与运行[M].上海:上海科学技术出版社,2000.
[21]唐建辉,胡敏强.隐极同步发电机进相运行功角计算方法初探[J].江苏电机工程,2004,23(3):34-35,37.TANG Jianhui,HU Minqiang.A new calculation method of power angle of non-salient pole synchronous generator in under-excitation operation[J].Jiangsu Electrical Engineering,2004,23(3):34-35,37.
[22]刘晓芳,蒙亮,罗应立,等.同步发电机d-q轴饱和特性曲线族[J].中国电机工程学报,2002,22(2):69-73.LIU Xiaofang,MENG Liang,LUO Yingli,et al.The saturation curve series of synchronous generators[J].Proceedings of the CSEE,2002,22(2):69-73.
[23]MASON C R.A new loss-of-excitation relay for synchronous generators[J].Transactions of the American Institute of Electrical Engineers,1949,68(2):1240-1245.
[2]国家能源局.大型发电机变压器继电保护整定计算导则:DL/T 684-2012[S].北京:中国电力出版社,2012.National Energy Commission.Guide of calculating settings of relay protection for large generator and transformer:DL/T 684-2012[S].Beijing:China Electric Power Press,2012.
[3]IEEE Power Engineering Society.IEEE guide for ACgenerator protection:IEEE Std C37.102-2006[S].
[4]汪静,余高旺.华东电网并网机组涉网保护相关标准及核查问题分析[J].电力工程技术,2017,36(5):66-70.WANG Jing,YU Gaowang.Analysis of related standards and verification problems of grid-related generator protection in state grid east china branch[J].Electric Power Engineering Technology,2017,36(5):66-70.
[5]王维俭,桂林,王雷,等.发电机失磁保护阻抗元件定值整定的再讨论[J].电力自动化设备,2009,29(12):1-3.WANG Weijian,GUI Lin,WANG Lei,et al.Re-discussion of setting calculation for impedance of generator loss-of-excitation protection[J].Electric Power Automation Equipment,2009,29(12):1-3.
[6]隋佳音,毕天姝,薛安成,等.新型发电机失磁保护加速判据研究[J].电力系统保护与控制,2010,38(20):69-73.SUI Jiayin,BI Tianshu,XUE Ancheng,et al.A novel accelerated criterion for loss of field protection[J].Power System Protection and Control,2010,38(20):69-73.
[7]高兴泉,王立国.基于SIMULINK/SIMSCAPE的计算机控制系统仿真实验平台[J].实验技术与管理,2013,30(9):88-92.GAO Xingquan,WANG Liguo.Simulation experiment platform for computer control system based on SIMULINK/SIMSCAPE[J].Experimental Technology and Management,2013,30(9):88-92.
[8]张旭东.不同原理的发电机失磁保护误动分析与改进[J].电力系统自动化,2001,25(6):63-65.ZHANG Xudong.Analysis of mis-operation of protection for loss of excitation and its improvement[J].Automation of Electric Power Systems,2001,25(6):63-65.
[9]刘桂林,宋玮,宋新立.基于涉网保护的低励限制、失磁保护与失步保护配合的研究[J].电力系统保护与控制,2014,42(23):107-112.LIU Guilin,SONG Wei,SONG Xinli.Research on coordination of low excitation limit,loss of excitation and out-of-step protection based on grid-related protection[J].Power System Protection and Control,2014,42(23):107-112.
[10]樊波,牛天林,薛钧义.基于MATLAB的发电机失磁故障仿真研究[J].电气技术,2007,4(2):60-63.FAN Bo,NIU Tianlin,XUE Junyi.The simulation research of generator loss-of-excitation faults based on MATLAB[J].Electrical Engineering,2007,4(2):60-63.
[11]王道元,徐余法,梁旭彪,等.百万千瓦汽轮发电机失磁动态过程仿真分析[J].电机技术,2015(5):1-4.WANG Daoyuan,XU Yufa,LIANG Xubiao,et al.Simulation on excitation-loss dynamic characteristic of the 1000 MW turbo-generator[J].Electrical Machinery Technology,2015(5):1-4.
[12]王维俭,侯炳蕴.大型机组继电保护理论基础[M].2版.北京:水利电力出版社,1989.
[13]殷建刚,彭丰.发电机失磁保护的典型配置方案[J].继电器,2002,30(3):33-36.YIN Jiangang,PENG Feng.Research on the typical configure of generator loss of field protection[J].Relay,2002,30(3):33-36.
[14]解兵,徐珂,刘建坤,等.励磁调节器低励限制整定原则和整定方法研究[J].电力系统保护与控制,2018,46(8):142-147.XIE Bing,XU Ke,LIU Jiankun,et al.Study on the principle and setting method of low excitation limit setting for excitation regulator[J].Power System Protection and Control,2018,46(8):142-147.
[15]郑涛,余青蔚,詹荣荣,等.调相机接入对发电机失磁保护的影响[J].电力系统保护与控制,2018,46(4):50-56.ZHENG Tao,YU Qingwei,ZHAN Rongrong,et al.Impact of synchronous condenser access on generator loss of excitation protection[J].Power System Protection and Control,2018,46(4):50-56.
[16]闵勇,陈磊,姜齐荣.电力系统稳定分析[M].北京:清华大学出版社,2016.
[17]何青,李国庆,王立健,等.汽轮发电机功率-负荷不平衡保护仿真分析[J].热力发电,2018,47(11):102-108.HE Qing,LI Guoqing,WANG Lijian,et al.Simulation of power-load unbalanced protection for turbo-generator[J].Thermal Power Generation,2018,47(11):102-108.
[18]严伟,陈俊,沈全荣.大型隐极发电机进相运行的探讨[J].电力系统自动化,2007,31(2):94-97.YAN Wei,CHEN Jun,SHEN Quanrong.Discussion on large non salient pole generator phase advancement operation[J].Automation of Electric Power Systems,2007,31(2):94-97.
[19]高志远,曹阳,徐昊亮,等.电力系统关键技术发展刍议[J].电力系统保护与控制,2017,45(17):14-17.GAO Zhiyuan,CAO Yang,XU Haoliang,et al.Primary discussion on the key technologies development of power system[J].Power System Protection and Control,2017,45(17):14-17.
[20]汪耕,李希明.大型汽轮发电机设计、制造与运行[M].上海:上海科学技术出版社,2000.
[21]唐建辉,胡敏强.隐极同步发电机进相运行功角计算方法初探[J].江苏电机工程,2004,23(3):34-35,37.TANG Jianhui,HU Minqiang.A new calculation method of power angle of non-salient pole synchronous generator in under-excitation operation[J].Jiangsu Electrical Engineering,2004,23(3):34-35,37.
[22]刘晓芳,蒙亮,罗应立,等.同步发电机d-q轴饱和特性曲线族[J].中国电机工程学报,2002,22(2):69-73.LIU Xiaofang,MENG Liang,LUO Yingli,et al.The saturation curve series of synchronous generators[J].Proceedings of the CSEE,2002,22(2):69-73.
[23]MASON C R.A new loss-of-excitation relay for synchronous generators[J].Transactions of the American Institute of Electrical Engineers,1949,68(2):1240-1245.