Partial discharge of the transformer is a key factor affecting its safe and stable operation. As a non-destructive testing method, ultrasonic positioning technology plays an important role in transformer partial discharge detection. This technology analyzes and processes ultrasonic signals to achieve accurate positioning of the internal partial discharge position of the transformer. Its advantages are non-contact measurement, strong anti-electromagnetic interference ability, high positioning accuracy, and the ability to detect without affecting the normal operation of the transformer. This helps engineers accurately determine the severity and cause of partial discharge and provides a scientific basis for the maintenance and management of transformers. Therefore, transformer partial discharge ultrasonic positioning technology is of great significance to ensure the safe and stable operation of the power system. The purpose of this paper is to explore the application and technical characteristics of the ultrasonic method in the field detection of transformer partial discharge. The ultrasonic method realizes real-time monitoring and evaluation of the insulation status of the transformer by capturing the ultrasonic signal generated by partial discharge. This method provides a strong guarantee for the safe operation of the transformer. However, there are some limitations in the practical application of ultrasonic methods, such as signal attenuation, the influence of propagation speed by media, and the difficulty of energy calibration, which may affect the accuracy and reliability of detection.

Bohui Zhang, Xiang Zheng. Research Status and Prospect of Energy Absorption Devices. International Journal of Engineering Technology and Construction (2025), Vol. 6, Issue 1: 28-35. https://doi.org/10.38007/IJETC.2025.060103.

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