变压器可听声诊断技术中传声器的选择

变压器故障检测技术研究一直是变压器研究领域的热点问题,基于可听声的变压器诊断技术是当前较新的变压器故障诊断方法。其中可听声数据采集过程是非常关键的一步,因此可听声信号采集设备的性能直接影响诊断结果的判定。文中在对常用的动圈式、电容式、驻极体电容式传声器的结构、参数性能进行分析比较的基础上,根据变压器可听声信号的特性及检测要求,推荐在变压器可听声诊断检测中采用驻极体电容式传声器。最后,采用驻极体电容式CRY333型传声器对某地区实时运行中的变压器进行数据采集,结果表明该类传声器参数性能合适,适用于变压器可听声采集。

The Selection of Microphone in Power Transformer Diagnosis Technology Based on the Audible Sound

The research of transformer fault detection technology has always been a hot topic in the field of transformer research.The transformer diagnostic technology based on audible sound is a newer transformer fault diagnosis method,in which the audible data acquisition process is a very critical step.So the performance of the audible acoustic signal acquisition device directly affects the determination of the diagnosis result.This paper analyzes and compares the structure and performance parameters of commonly used moving coil microphones,capacitive microphones and electret condenser microphones.According to the characteristics of the audible signal of the transformer and the detection requirement,it is recommended to use the electret condenser microphone in the audible diagnosis of the transformer.Finally,an electret condenser CRY333 microphone is used to collect the data in a certain area.The results show that the performance of the microphone is suitable for transformer audible acquisition.