基于振动分析法的变压器在线监测

On-line transformer monitoring based on vibration analysis

研究了变压器的振动原理,提出了变压器振动简化模型,用最小二乘法对现场试验数据进行参数拟合,得到振动模型参数,可作为指纹参数,由任意时刻电压、电流幅值计算求得变压器振动幅值,根据与实际振动的比较,判断变压器是否故障,实践证明,该方法预估的变压器振动信号具有很高精确度,在变压器在线监测绕组与铁心状态中有良好的应用前景。

The vibration theory for transformers was analyzed, and the simplified transformer vibration model was proposed. The least-squares method was used for parameter fitting from field measured data to get the vibration model parameters as the fingerprint parameter to calculate the vibration amplitude from the voltage and current magnitudes at any time. The calculated amplitude was then compared with actual vibration amplitude to judge transformer faults. Practice showed that the predicted transformer vibration signals obtained by this method are accurate.