电工技术学报2015，Vol.30Issue(z2)：195-200,6.
基于COMSOL的变压器中超声波传播特性
Ultrasonic Wave Propagation Characteristics of the Transformer Based on COMSOL
齐伟强 1李俭 2陈柏超 3袁佳歆 1钟永恒1
作者信息
- 1. 武汉大学电气工程学院 武汉 430072
- 2. 国网北京电科院 北京 100075
- 3. 国家电网公司西南分部 成都 610041
- 折叠
摘要
Abstract
This paper establishes a simulation model of the transformer and studies in case of partial discharge power supply fixed, the sound pressure propagation in space, sound pressure amplitude variation in the spread process, the influence of the position of the partial discharge on signal propagation characteristics and acoustic attenuation of propagation in the core windings and transformer oil. Simulation results show partial discharge occurs within 1ms after the explosion, and the spatial distribution of the sound pressure inside the transformer changes rapidly, but there is no significant changes after 1ms. The change of sound pressure in the core and winding of the transformer is larger than that in the oil. Partial discharge explosion spreads to the surrounding medium in the form of wave front with spherical wave. The closer the position of the partial discharge power source is, the bigger of the received signal amplitude is. When acoustic wave propagates in the core, winding and transformer oil, the sound pressure amplitude possesses different attenuation in three directions due to the different propagation path and the increasing of the propagation distance. Experiments show the validity of the simulation results. And the analysis can provide the basis for the detection of partial discharge in transformer.关键词
局部放电/变压器/超声波/COMSOLKey words
Partial discharge/transformer/ultrasonic wave/COMSOL分类
信息技术与安全科学引用本文复制引用
齐伟强,李俭,陈柏超,袁佳歆,钟永恒..基于COMSOL的变压器中超声波传播特性[J].电工技术学报,2015,30(z2):195-200,6.
