原动机及调速系统对强迫功率振荡的影响  

Effects of power turbine and its governor on forced oscillations

作　　者：辛建波 舒展 冯双[2] 徐在德 蔡霞 蒋平[2] 吴熙[2] 徐青山[2] XIN jianbo;SHU Zhan;FENG Shuang;XU Zaide;CAI Xia;JIANG Ping;WU Xi;XU Qingshan(Jiangxi Electric Power Company Research Institute,Nanchang 330096,China;School of Electrical Engineering,Southeast University,Nanjing 210018,China)

机构地区：[1]国网江西省电力公司电力科学研究院,江西南昌330096 [2]东南大学电气工程学院,江苏南京210018

出　　处：《南京工业大学学报（自然科学版）》2018年第6期79-83,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金(51577032);中央高校基本科研业务费专项

摘　　要：原动机机械功率扰动是引发强迫功率振荡的重要原因,而机械功率是由原动机及调速系统决定的,本文从原动机及调速系统的角度研究不同扰动源位置对强迫功率振荡的影响。根据强迫功率振荡的机制通过建立汽轮机和水轮机的数学模型,分析其中可能存在的扰动源。然后基于原动机传递函数的幅频特性,深入研究不同原动机及调速系统以及其中不同扰动源引发的强迫功率振荡。最后在Matlab/Simulink的单机无穷大系统中进行仿真,验证理论分析的正确性,所得结论对强迫功率振荡的预防和抑制具有参考价值。Mechanical power fluctuation is the significant reason for forced oscillations,which is determined by power turbine and its governor.The influence of disturbance source location on forced oscillations from the aspect of power turbine and its governor was investigated.Based on the mechanism of forced oscillations,possible disturbance sources were analysed through constructing the mathematical model of steam turbine and hydraulic turbine.From the amplitude characteristics of transfer function of power turbine,different power turbines and their governors as well as disturbances in them which led to forced oscillations were studied.Simulations were carried out in Matlab/Simulink to verify the correctness of theoretical analysis.Results are useful for the prevention and mitigation of forced oscillations.

关 键 词：汽轮机 水轮机 调速系统 电力系统强迫功率振荡 扰动源 

分 类 号：TM71[电气工程—电力系统及自动化]