FEM Simulation of PD Acoustic Signal Propagation in Transformers

Abstract:

In order to study propagation process of partial discharge ultrasonic signal in power transformer, the finite element method is used for simulation modeling and calculation. Ultrasonic waves can be activated by partial discharges (PD) in power transformers. The ultrasonic method is used for evaluating the insulation condition of power transformers by analyzing the partial discharge signals information which is detected by AE sensors. Compared with other diagnostic methods the AE method causes relatively low disturbance, and measuring apparatus is simple and easy to use. This technique is noninvasive and immune to electromagnetic noise. Simulate partial discharge sources of different positions respectively. Achieved results indicate that the space and time distributions of the acoustic pressure depend on the induction position. Furthermore, a greater pressure gradient is observed in domains with higher speed of sound while the signal amplitude decays when it moves away from the PD source.

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 2278-2285
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.2278
• Online since: October 2013
• Authors: Yue Dong, Yong Qian, Hai Feng Ye, Xiu Chen Jiang
• Keywords: Finite Element Method (FEM), Numerical Calculation, Partial Discharge (PD), Propagation Property, Transformer, Ultrasonic Wave

References

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