Experimental Research of Transformer’s Vibration due to the Winding Looseness
Author(s): LL Yang-hai, WANG Guang-ting, LU Shuang-long, ZHOU Miao
Pages: 34-37,55
Year: 2016 Issue: 5
Journal: Noise and Vibration Control
Keyword: vibration and wave; tarnsformer; winding looseness; vibration; energy entropy;
Abstract: The winding fault is an important part of transformer faults. Analysis of vibration signal can realize online monitoring of the winding operation. In this paper, the vibration mechanism of winding and the propagation path of vibration are introduced. By making the winding faults artificially, vibration signals of the oil tank surface of the transformer are measured under different winding looseness. These signals are processed with wavelet transform (WT), empirical mode decomposition (EMD) and ensemble empirical mode decomposition (EEMD). And the energy entropies of the three methods are also calculated. Comparison of the results shows that both variation laws of three kinds of energy entropy and the amplitude at 100Hz can be used as the criteria for preliminary estimation of the looseness of the winding.
Pages: 34-37,55
Year: 2016 Issue: 5
Journal: Noise and Vibration Control
Keyword: vibration and wave; tarnsformer; winding looseness; vibration; energy entropy;
Abstract: The winding fault is an important part of transformer faults. Analysis of vibration signal can realize online monitoring of the winding operation. In this paper, the vibration mechanism of winding and the propagation path of vibration are introduced. By making the winding faults artificially, vibration signals of the oil tank surface of the transformer are measured under different winding looseness. These signals are processed with wavelet transform (WT), empirical mode decomposition (EMD) and ensemble empirical mode decomposition (EEMD). And the energy entropies of the three methods are also calculated. Comparison of the results shows that both variation laws of three kinds of energy entropy and the amplitude at 100Hz can be used as the criteria for preliminary estimation of the looseness of the winding.
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