基于复参数估计的逆变器故障实时检测  

Real-time fault detection technique for inverter based on complex parameter estimation

作　　者：崔博文[1] 

机构地区：[1]集美大学机械工程学院,厦门361021

出　　处：《仪器仪表学报》2006年第z1期393-394,412,共3页Chinese Journal of Scientific Instrument

基　　金：福建省自然科学基金(E0440005);福建省教育厅(JA004230)资助项目

摘　　要：逆变器故障主要表现为开关元件的不正常开通和关断。本文提出了一种基于复参数估计的逆变器实时状态监控方法。通过对逆变器输出电压信号的变换,得到逆变器输出电压信号的数字模型。利用复参数最小二乘估计方法获得了逆变器输出信号的基本正序对称分量和基本谱残差。提出了故障决策函数,通过观测故障决策函数值的跳跃变化,实现了逆变器的故障实时检测。仿真研究证明本文方法的有效性。Open base drive and shoot through faults are always occurred in the inverter.The paper develops a real-time condition monitoring algorithm for inverter based on complex parameter estimation.On processing the inverter voltage signal,the model of inverter voltage signal is got.Using complex least square parameter,the fundamental positive sequence and spectral residual are obtained.The concept of fault decision-making function is proposed,the fault occurred in the inverter can be detected in real time by observing the abrupt change of the function. The simulation results show that the method is effective.

关 键 词：参数估计 逆变器 谱残差 故障检测 

分 类 号：TH7-55[机械工程—仪器科学与技术]