基于向量拟合法的配电变压器振动特性分析
Power Transformer Vibration Characterization Analysis いby Vectoring Fitting Method

尝试使用向量拟合法对变压器表面振动数据进行拟合分析。首先，通过与频域复指数最小二乘法的对比，验证向量拟合法的适用性；其次，用向量拟合法分析变压器表面振动数据，发现变压器由100Hz工作频率及其倍频引起的强迫振动响应占据主导地位，变压器底部靠近铁芯处振动量级更大。将底部振动数据单独进行向量拟合法分析得到局部模态，为振动测点位置优化和故障识别提供参考依据。
Vibration characterization of power transformer is an import key to reliability and trouble shooting, The vector fitting (VF)method is used to analysis vibration test data of power transformer surface. The VF is compared with PolyLSCF method and the experimental data of power transformer is analyzed. It can be found that the 100 Hz operation frequency causes harmonic response, and the vibration level of the transformer bottom is much higher and local mode is checked after sole analysis. The analysis result will provide advice on optimization of measurement point locations and failure recognition.