交-交变频交流励磁发电机的建模与仿真  

Modeling and Simulation of AC Excited Generator Adopting AC-AC Frequency Converter

作　　者：宋耀东[1] 刘宪林[1] 

机构地区：[1]郑州大学电气工程学院,河南郑州450002

出　　处：《系统仿真学报》2007年第24期5837-5840,共4页Journal of System Simulation

摘　　要：交流励磁发电机励磁控制仿真大多针对采用交直交变频器的情况。大容量水电机组宜采用交-交变频器。为了分析交流励磁发电机采用交-交变频器和定子磁场定向矢量控制的效果,建立了基于MATLAB/Simulink S-函数的交-交变频器模型,搭建了基于交流励磁发电机标幺值方程和定子磁场定向矢量控制的交-交变频励磁发电机仿真模型。基于该模型对有功功率和无功功率解耦控制以及转子转速超同步与亚同步转换等动态过程进行仿真。结果表明,采用交-交变频器和定子磁场定向矢量控制可以实现有功无功的独立快速调节;在调节过程中,定子电压频率稳定不变;转子转速在超同步与亚同步之间转换时,三相转子电流进行了换相。仿真结果与理论分析结果相一致。The excited controlling simulations of AC excited generator are mostly aimed at the situation using AC-DC-AC frequency converter. Large content hydroelectricity set should use AC-AC frequency converter. In order to analyze the effect of using AC-AC frequency converter and stator field oriented vector control strategy, based on the model of AC-ACfrequency converter of MATLAB/Simulink s-function and by setting up the per unit equation group for AC excited generator and stator field oriented vector control strategy, the complete simulation model of AC excited generator adopting AC-AC frequency converter was set up. The decoupling control of active power and reactive power and the dynamic process like transition of supersynchronous speed and subsynchronous speed of rotor were simulated based on the simulation model built up. The result shows that using AC-AC frequency converter and stator field oriented vector control strategy can realize the independent rapid adjustment of active power and reactive power. During the process of adjustment, the frequency of stator voltage remains stably the same, and phase sequence of triphase rotor current changes when rotor speed is converted between supersynchronous speed and subsynchronous speed. The result of simulation is in accordance with the result of theoretical analysis.

关 键 词：交流励磁发电机 矢量控制 交-交变频器 SIMULINK 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]