励磁功率单元主回路快速故障诊断策略

分析总结了发电机组励磁系统功率单元的故障类型和常见故障，通过 Matlab 仿真功率单元主回路故障类型，重点研究基于故障频谱分析的定量故障特征提取和故障分类，提出了一种快速针对功率单元主回路的故障诊断真值表法，最后通过实验平台验证故障类别，结果表明：该方法能够正确有效地诊断出功率单元主回路具体的故障晶闸管，为励磁系统功率单元故障诊断提供依据。

Fast fault diagnosis strategy for the main loop of excitation power unit

This paper summarizes the fault type of generator excitation power unit and common fault. Through the simulation of Matlab power unit which is the main circuit fault types, fault spectrum analysis focuses on the quantitative fault feature extraction and fault classification. Then a truth table method for fast fault diagnosis strategy of the main loop of power unit is proposed, and the platform experiment verifies fault categories. The strategy provide the basis for excitation system power unit failure diagnosis.