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首页> 外文会议>2017 2nd International Conference on Power and Renewable Energy >Study on vibration monitoring and multi-feature analysis of oil-immersed power transformer in arctic area
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Study on vibration monitoring and multi-feature analysis of oil-immersed power transformer in arctic area

机译：北极地区油浸式电力变压器的振动监测和多特征分析研究

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The low temperature in East Mongolian arctic winter may lead to the part of the bottom of the transformer insulating oil condensation, affecting the cooling of transformer. And then winding and core break down. Transformer vibration monitoring method has been widely researched and applied in transformer winding and core fault detection with its advantages of no electrical connection, easy installation and so on. Based on vibration monitoring of 500kV substation in Haibei East Mongolia No. 1 and No. 2 main transformers, this paper puts forward a diagnostic method of transformer winding and core based multi-features including time domain partial peak degree of vibration signal, frequency domain center frequency and energy ratio on time-frequency combined Dual Tree Complex Wavelet method(DT-CWT). The characteristic fingerprint database of the vibration signal of the transformer in the arctic area was established. It is found that the parameters of phrase B in No.1 main transformer of 500kVsubstation in Haibei were different from other transformers. By the maintenance of transformer windlass cover, it is found that there are some problems with the core transformer, such as uneven silicon steel sheet, larger the space in lamination. Then the diagnostic method of this article has been verified.
机译：蒙古东部北极冬季的低温可能导致变压器底部的部分绝缘油凝结，影响变压器的冷却。然后绕组和铁芯击穿。变压器振动监测方法具有无电气连接，安装方便等优点，已在变压器绕组和铁心故障检测中得到了广泛的研究和应用。基于对海北东蒙1号和2号主变压器500kV变电站的振动监测，提出了一种基于变压器绕组和铁心的多特征诊断方法，包括振动信号的时域局部峰值度，频域中心时频联合双树复小波方法（DT-CWT）的频率和能量比。建立了北极地区变压器振动信号的特征指纹数据库。发现海北500kV变电站1号主变B短语的参数与其他变压器不同。通过维护变压器的卷扬机盖，发现铁心变压器存在一些问题，例如硅钢板不均匀，叠层空间较大。从而验证了本文的诊断方法。

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