某电站50 MW发电机自并励励磁系统仿真分析

Simulation Analysis of the Self-shunt Excitation System in 50 MW Generators in a Power Station

本文以某电站50 MW水轮发电机组励磁系统为研究对象,分析了励磁系统各组成部分的传递函数,建立了完整的自并励静止励磁系统数学模型(ST1A);应用Matlab软件中的simulink工具,以建立的数学模型为基础搭建了水轮发电机自并励静止励磁系统仿真模型,并对所建模型以发生三相接地故障为例进行仿真研究,验证了所建模型的正确性。

The excitation system in 50 MW hydro-turbine generator units in a power station is studied.The transfer functions of every components of the excitation system are analyzed,and a complete mathematical model(ST1A)of the self-shunt static excitation system is established.Using the Simulink toolbox in Matlab software,a simulation model of the self-shunt static excitation system of hydro-turbine generators is built based on the established mathematical model.Then,the correctness of the model is verified with simulation of a three-phase grounding fault of the system.