期刊论文

中文

电机与控制应用

1673-6540

2019

46

5

120-125

10.3969/j.issn.1673-6540.2019.05.020

本校为第一机构

将负序电流作为异步电机定子绕组匝间短路的故障特征量,在提取时易受谐波、噪声等因素的影响,而频谱分析也较为复杂,故障诊断的可靠性和高效性难以兼顾。为可靠高效地诊断异步电机定子绕组匝间短路,在多次派克变换的基础上,提出故障特征量Izpg以反映故障。首先根据故障后的电机磁场推导出故障后定子中存在的电流频次;然后得到非理想工况下,利用多次派克变换提取故障特征量Izpg的表达式;最后建立故障后异步电机的多回路数学模型,对理想工况和非理想工况下定子不同严重程度的匝间短路进行仿真。分析结果表明,Izpg和故障严重程度正相关且对电压源不平衡这类非理想工况呈现鲁棒性,用Izpg诊断异步电机...

When the negative sequence current is taken as the fault characteristic quantity of inter-turn faults in stator windings of asynchronous motor, its extraction is easily affected by harmonics and noises and the spectrum analysis is rather complicated, so it is difficult to balance the reliability and efficiency of fault diagnosis. In order to diagnose inter-turn faults in stator windings of asynchronous motor reliably and efficiently, on the basis of multiple Park’s transformations, the fault characteristic quantity I z pg was put forward to re...