脉冲注入法在变压器绕组故障诊断中的应用

Research on Selection of Input Signal for Pulse Online Injection Method in Detecting of Transformer Winding Deformation

基于脉冲在线注入的绕组故障在线检测方法,可以较好地反应各种类型故障,该方法具有全频段的响应特性,对绕组各种类型的故障均有较为灵敏的反应,脉冲在线注入的前提是对在线运行的变压器注入脉冲,为使检测效果达到最佳,选择一个合适的脉冲注入信号是利用脉冲在线注入法实现变压器绕组故障诊断的一个重要前提,因此需要对脉冲注入信号进行研究,通过各种信号比较,最终确定方波信号作为一个最优的脉冲注入信号,为本方法在电力变压器绕组在线故障诊断奠定基础。

s：The injection signal researcher of pulse injection method in the detecting of winding deformation, which could relfect the winding deformation types, The method was the characteristic of full frequency, which was sensitive for every types of transformation winding fault. The premise of pulse injection online was for the online operation inject pulse transformer, in order to make the best result. It was important to select a suitable pulse injection. So it was essential to make a research for all types of input signal. And it determined the square wave signal as the optimal with comparing of all types signal. The selection of input signal laid a solid foundation for the pulse online injection.