基于超高频和超声波的干式变压器局部放电检测与定位的研究

Research on Partial Discharge Detection and Localization of Dry-Type Transformer Based on UHF and Ultrasonic Wave

随着干式变压器的用途越来越广泛,对其在运行过程中的安全有效性要求也越来越高,因此对其进行局放检测尤为重要;主要分析了检测干式变压器局部放电的超高频方法与超声波方法的原理及检测方法,研究了基于超声和超高频相结合的干式变压器局部放电定位算法,试制了超高频传感器,并设计了一套超高频与超声波相联合的局放检测系统;通过该系统,对干式变压器局部放电源进行综合定位实验,实验结果验证了该方法的有效性,为干式变压器的局部放电检测提供了参考。

As the use of the Dry--type Transformer becomes more and more widely, the demand for the safety and effective is also high in the process of operation. So the partial discharge detection of Dry--type Transformer is seemed particularly important. This paper mainly analyzes the UHF and Ultrasonic wave method of partial discharge detection of Dry--type Transformer, and the principle and test methods of these two methods. And we built a detection system of partial discharge detection based on the combination of UHF and Ultrasonic wave. The discharge location method based on UHF and Ultrasonic wave is studied. Through the system, we use the combination of UHF and Ul- trasonic wave method to local the ot：ientation of the partial discharge source. The effectiveness of this system and method is provide by experi- ment result. This system provides reference for partial discharge detection.