水轮发电机组振荡特性的简化分析方法

Simplified analytical method of oscillating characteristic for hydroturbine generating unit

为了系统地研究水轮发电机组参数振荡特性及影响因素,为控制策略设计提供依据,提出一种简化分析方法。将水轮发电机组变量的运动归纳为两种基本运动形式:伪谐和运动和过阻尼运动,给出从仿真或实测数据提取运动参数建立运动模型的方法。结合实例进行仿真,建立机组变量运动模型,并分析机组参数、扰动强度以及初始工况对运动参数的影响。仿真结果表明,所提出的方法能获得机组变量运动的主导模式,对机组变量振荡运动的描述直观、有效。

A simplified method is illustrated to study oscillating characteristic for hydroturbine generating unit, which provides material for control design. Variable movements of hydroturbine generating unit were divided into two fundamental motion models：pseudoharmonic motion and overdamping motion. And it introduced detail methods from simulation or actual measurement data extracting parameters to establish motion models. With a simulation case, the paper describes how to establish motion models of main unit variables,and analyzes influence of system parameters, disturbed intensity and initial operating point on the motion oscillation parameters. Simulation results indicate that this method can obtain mast mode of variable motion, and is illustrative and valid.