A DC corona discharge location system based on ultrasonic array measurement system was designed and built in order to obtain the location of DC corona discharge point. The ultrasonic array measurement system is composed of 8-element microphone array, and is suitable for ultrasonic detection of middle distance. The ultrasonic signals generated by corona discharge were collected by ultrasonic array measurement system, and the two-dimensional MUSIC method was used to estimate the spatial spectrum of the collected signals and accurately locate the discharge points. The experimental results show that the developed detection and location system can effectively locate corona discharge points and adapt to poor actual measuring environment, which is of great value to engineering practice.

DC corona,Ultrasonic Detection,Source Location