水轮发电机组调速系统的非线性输出响应分析  

Analysis on Nonlinear Output Frequency Response of Hydro Governing System

作　　者：夏鑫[1] 倪伟[1] 周建中[2] 

机构地区：[1]淮阴工学院自动化学院,江苏淮安223003 [2]华中科技大学水电与数字化工程学院,湖北武汉430074

出　　处：《水力发电》2016年第1期70-73,83,共5页Water Power

基　　金：国家自然科学基金项目(51079057)

摘　　要：针对水电机组调速系统结构复杂且存在诸多非线性环节,提出了一种基于非线性输出频率响应函数的水轮发电机组调速系统分析方法,该方法可以很好的避免调速系统建模困难的问题,同时又能较好地反应调速系统模型的非线性特性。首先,建立了具有非线性特性的调速系统模型。进而对不同工况参数下的调速系统进行仿真,利用仿真数据辨识出各工况下的NOFRFs模型。最后,对调速系统各工况下的NOFRFs进行分析。实验仿真结果指出,所提方法能够清晰的描述运行工况变化时调速系统的非线性变化特性,为调速系统的优化控制与故障诊断提供了一定的理论依据。As the hydro turbine governing system has many nonlinear link, a metbod based on nonlinear olllp/ll frequency response funelions （NOFRFs） is proposed to apply on the analysis of governing system of hydro-generator unit. This method can avoid the problem in complex system modeling and provide good description on the nonlinear characteristics. Firstly, the nonlinear hydraulic governing system model is built. Then, the hydraulic governing system is simulated under different operation conditions and the NOFRFs under different operation conditions are identified. Finally, the nonlinear characteristics are analyzed. The simulation results indicate that the proposed method can clearly describe the change of nonlinear characteristics. The proposed method can provide some theoretical basis for optimal control and fault diagnosis of governing system.

关 键 词：调速系统 非线性输出响应 参数辨识 水轮发电机组 

分 类 号：TM312[电气工程—电机]