基于PSCAD/EMTDC的扭振保护封装及工程应用  

The package of torsional vibration protect based on PSCAD/EMTDC and its application in projects

作　　者：刘智慧[1,2] 王新雷 马实一[1] 王莹莹[2] 赵伟华[2] LIU Zhihui;WANG Xinlei;MA Shiyi;WANG Yingying;ZHAO Weihua(State Power Economic Research Institute,Beijing 102209,China;Beijing Sifang Automation Co.,Ltd.,100084 Beijing,China)

机构地区：[1]国网北京经济技术研究院,北京102209 [2]北京四方继保自动化股份有限公司,北京100084

出　　处：《电气应用》2021年第1期101-106,共6页Electrotechnical Application

摘　　要：电厂送出输电线路的串联电容补偿、直流输电和电力系统稳定器的不当加装,发电机励磁系统、晶闸管控制系统和电液调节系统的反馈作用等,均有可能诱发、导致次同步振荡/次同步谐振,严重情况可引起发电机汽轮机扭振保护动作。在PSCAD/EMTDC上利用仿真平台自带的自定义建模功能,使用Fortran语言建立了汽轮机扭振保护模型,并对其仿真结果与北京四方继保自动化股份有限公司实际装置测试结果进行了比较,仿真表明数字扭振保护的仿真结果是可信的。将某多机带串补远距离输电电厂送出仿真得到的次同步谐振时机组转速的模态衰减曲线作为数字扭振保护装置的输入,仿真得到扭振保护切机结果,形成了一、二次的闭环仿真分析。仿真得到了电厂多机在不同运行方式扰动下的扭振保护动作情况,同时针对SN曲线两组不同整定值进行了计算,为电厂送出实际运行方式选择以及扭振保护的整定提供了参考。Power transmission line sent with the series capacitor compensation, DC transmission, power system stabilizer of improper installation of the generator excitation system, thyristor control system, feedback electrohydraulic control system, etc., are likely to induce, lead to sub-synchronous oscillation/SSR, severe cases cause the turbine generator torsional vibration protection action. On PSCAD using its own custom modeling capabilities in Fortran development, a digital protection torsional vibration model is established and the simulation results are compared with their true means. Digital simulation show that the protection of the torsional vibration simulation results are credible. which is simulated sent Sub-synchronous resonance unit speed modal attenuation curve a multimachine with Series Compensation long-distance transmission plant is as a digital input device torsional vibration protection, protection of the torsional vibration cutting machine result is simulated, a primarg secondary the closedloop simulation analysis is formed, power plant multi-machine in different operating modes of torsional vibration protection action cases is got, the SN curve two different setting values are calculated, the power plant actual operation mode selection and the torsional vibration protection setting are provided as a reference.

关 键 词：自定义建模 扭振保护 PSCAD仿真 工程应用 

分 类 号：TM721.3[电气工程—电力系统及自动化] TM712