Partial Discharge Detection System Based on Acoustic Emission Sensor Pair and Single-Chip Microcontroller Detector

• Main Authors: Keng-YaoChen, 陳耿堯
• Other Authors: Cheng-Chi Tai
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/93577156962563318602

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 101 === Partial discharge (PD) detection is used to detect the degradation of insulating material inside electrical equipment so as to avoid malfunction and burning down caused by partial discharge. This paper mainly uses AE Sensor pair to capture partial discharge signal and surrounding sound noise, to avoid the situation that single acoustic emission sensor cannot recognize whether the signal is internal partial discharge or external noise interference, and combine low power single chip microcontroller system (TI MSP 430) to make it automatically recognize the signal detected by the AE Sensor pair and store the complete discharge information in memory card for interpretation. By pencil lead break experiment, it can be verified that this system has the function of recognizing discharge signal and surrounding noise. Furthermore, the severity of partial discharge in the test object can be judged through discharge times and time stored in the memory card. In addition, it can also use multigroup acoustic emission sensor pair to do simple partial discharge positioning and find out the discharge source. This system can not only be used for long-term tracking record, but also provide important data of statistical analysis.