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Sensitivity Analysis on Ladder Network Equivalent Circuit Parameters of Power Transformer

机译:电力变压器梯形网络等效电路参数的灵敏度分析

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摘要

In this article, novel methods and ideas are introduced, which altogether lead to an accurate model of power transformer windings. First, by the determination of non-dominant (hidden) resonances from frequency-response tests, a ladder model is proposed. Next, it is improved by assigning different values for similar elements of each section of the model. The parameters are obtained by minimizing the error function via a genetic algorithm. Sensitivity analysis is then applied to the obtained model to achieve further examinations and tests. Measurements have been driven from the windings of a 20/0.4-kV, 1600-kVA transformer. Modeling, methodologies, and sensitivity analysis in this article can be very useful for future research aiming to find internal faults of the transformer with the frequency response analysis.
机译:在本文中,将介绍新颖的方法和思想,这些思想和思想共同导致了电力变压器绕组的精确模型。首先,通过从频率响应测试确定非主要(隐藏)共振,提出了一种梯形模型。接下来,通过为模型的每个部分的相似元素分配不同的值来进行改进。通过遗传算法使误差函数最小化来获得参数。然后将灵敏度分析应用于获得的模型,以实现进一步的检查和测试。测量是通过20 / 0.4kV,1600kVA变压器的绕组进行的。本文中的建模,方法和灵敏度分析对于将来的研究非常有用,该研究旨在通过频率响应分析来发现变压器的内部故障。

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