分析电力系统低频振荡的汽轮机控制系统模型

Steam Turbine Control System Model for Analyzing Low Frequency Oscillation of Power System

汽轮机控制系统引发了多起电网低频振荡事件,需要在分析低频振荡时考虑汽轮机控制系统模型。在对单元机组及其负荷控制系统的组成进行分析的基础上,给出了协调控制系统、汽轮机数字电液控制系统的数学模型;在对阀门结构、控制方式和流量特性进行分析的基础上,给出了考虑阀门流量特性的汽轮机模型。

Steam turbine control system may cause several low frequency oscillation events of the power grid, thereby, it is necessary to consider steam turbine control system model for analyzing low frequency oscillation. On the basis of analyzing constitution of the single-turbine unit and load control system, this paper provides mathematical models of coordination con- trol system and digital electro-hydraulic control system of the steam turbine. On the basis of analyzing valve structure, con- trol way and discharge characteristic, it provides steam turbine model considering of valve discharge characteristic.