水轮机调速系统对电力系统阻尼特性影响分析  

Analysis of impact of hydraulic turbine governing system on damping characteristics of power system

作　　者：孟宪影[1,2] 刘天琪[1] 李兴源[1] 龚在礼[2] MENG Xianying LIU Tianqi LI Xingyuan GONG Zaili(School of Electrical Engineering and Information, Sichuan University, Chengdu 610065,China Sichuan Electric Vocational and Technical College, Chengdu 610071, China)

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]四川电力职业技术学院,四川成都610071

出　　处：《武汉大学学报（工学版）》2017年第4期556-559,共4页Engineering Journal of Wuhan University

基　　金：国家自然科学基金重点项目(编号:51037003);国家高技术研究发展计划(编号:2011AA05A119)

摘　　要：在包含水轮机调速系统的Phillips-Heffron模型上,结合复转矩系数法和水轮机调速系统传递函数的频率特性,从机理上分析了水轮机调速系统对电力系统阻尼特性的影响,得出该影响取决于调速系统的附加阻尼转矩系数的大小和正负的结论,并给出了该系数的计算方法.从时域和频域两方面分析验证了调速系统及其参数对系统阻尼特性的影响,得出了水轮机调速系统对系统的低频振荡、特别是超低频振荡影响较大,对高频振荡影响较小的结论.Based on the model of Phillips-Heffron, combined torque analysis method with frequency charac- teristic of transfer function, the mechanism of hydraulic turbine governing system＇s impact on the power system damping characteristics is analyzed. A conclusion is drawn that the impact is strongly dependent on the value of torque coefficients for the boundary damping torque of the hydraulic turbine governor＇s sys- tem. And then the calculation method of the coefficient is proposed. From both of time domain and fre- quency domain, the influence of hydraulic turbine governing system and its parameters on the damping fea- tures is analyzed and verified. Finally, it comes to this conclusion that hydraulic turbine governing system will have more impact on low frequency oscillation, especially on ultra-low frequency oscillation than on high frequency oscillation.

关 键 词：水轮机 调速系统 阻尼特性 电力系统 

分 类 号：TM712[电气工程—电力系统及自动化]