Large Scale Distributed Modeling and Parameter Estimation of Power Transformers

最近变压器的故障表明，制造商和设计者使用的模型可能不足以研究变压器内发生的电压振荡。为了研究这一问题，建议从系统辨识的角度出发，建立大规模的分布式变压器模型。目标是根据测量结果独立估计变压器模型的参数。在这项研究中，两台变压器将根据测量的频率响应数据在50赫兹到1 MHz的范围内建模。这项研究的意义在于，变压器制造商可以使用本文提出的技术来独立验证其专有设计模型，并使用已验证的模型来研究变压器的内部电压振荡。电力系统工程师还可以使用该技术建立变压器模型，研究暂态电压分布、谐波和浪涌特性分析，并将模型用于EMTP应用，研究高压直流输电站在暂态运行过程中产生的射频电磁噪声。

Recent failures of transformers indicate that the models used by manufacturers and designers may not be adequate to study the voltage oscillations which occur within transformers. To study this problem, it is proposed to develop large-scale distributed transformer models from the standpoint of system identification. The goal is to independently estimate the parameters of the transformer models based on measurements. In this study, two transformers will be modeled from measured frequency response data in the range of 50 Hz to 1 MHz. The significance of the proposed research is that the transformer manufacturers can use the technique proposed here to independently validate their proprietary design model and use a validated model to study the internal voltage oscillations of transformers. The proposed technique can also be used by power system engineers to develop transformer models and to study transient voltage distribution, harmonics and surge performance analysis, and use the models in EMTP applications and to study RF EM noise generated during the transient operation of HVDC stations.