| 引用本文: | 孙庆森,张海峰,王猛,等.小波算法在变压器励磁涌流中的应用研究[J].电力系统保护与控制,2017,45(8):121-125. |
| SUN Qingsen,ZHANG Haifeng,WANG Meng,et al.Application of wavelet algorithm in the transformer inrush current[J].Power System Protection and Control,2017,45(8):121-125 |
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| 摘要: |
| 为了满足电气化设备对高性能变压器的需求，针对大功率变压器中存在的励磁涌流现象展开研究，并建立了仿真模型。利用一种新型的小波算法对变压器中的励磁涌流现象进行分析和数学建模，并研究了三相变压器的励磁涌流产生机制和信号提取方法，建立了精确的故障识别模型。最后，利用Matlab/Simulink软件设计了仿真系统，实现了对三相变压器的励磁涌流波形识别。仿真结果表明，该仿真模型能够有效提取出变压器励磁涌流的有关特性，为提高变压器的性能提供了理论支持。 |
| 关键词: 变压器 励磁涌流 小波算法 建模 信号提取 |
| DOI：10.7667/PSPC160664 |
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| Application of wavelet algorithm in the transformer inrush current |
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SUN Qingsen,ZHANG Haifeng,WANG Meng,WANG Huaxing
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(State Grid Taian Power Supply Company, Taian 271000, China)
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| Abstract: |
| In order to meet the demand of electrical equipment for high-performance power transformer, this paper studies inrush current phenomenon existing in high-power transformer and establishes the simulation model. The transformer inrush current phenomena is analyzed and mathematical modeling is done by using a new wavelet algorithm, the generating mechanism of three-phase transformer magnetizing inrush current and signal extraction method are studied, and the accurate fault recognition model is established. Finally, the simulation system is designed through Matlab/Simulink to achieve the recognition of three-phase transformer magnetizing inrush current waveform. Simulation results show that the simulation model can extract the relevant characteristics of the transformer inrush current, which provides a theoretical support for improving the performance of the transformer. |
| Key words: transformer inrush current wavelet algorithm modeling signal extraction |
