同步发电机励磁功率单元中可控整流桥的故障工况研究

摘要

分析了三相全控桥式整流电路的各种故障工况,得出故障下触发角与输出励磁电压之间的定量关系,并提出了相应的解决措施.通过对MATLAB/Simulink搭建的同步发电机励磁功率单元模型进行仿真,结果表明,所提措施能有效减轻故障对系统的不利影响,在脉冲丢失时,可以为备用设备切换赢得时间;晶闸管发生故障时,有利于调控发电机平稳退出运行以避免产生稳定性问题.%This paper analyzed different faults of three phase full controlled bridge rectifier circuit,gets the quantitative relationship between trigger angle and output excitation voltage,proposes relevant measure,and then simulates the model of excitation power unit by using MATLAB/Simulink platform.The results showed that the proposed method can effectively reduce the adverse effects of the fault on the system and obtain time for switching standby devices when pulses disappear or make for controlling generators existing smoothly to avoid stability problems when thyristors break down.