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- W2072715601 abstract "Abstract Power packages for calculation of power system transients are often used when studying and designing electromagnetic power systems. An accurate model of a distribution transformer is needed in order to obtain realistic values from these calculations. This transformer model must be derived in such a way that it is applicable when calculating those operating conditions appearing in practice. Operation conditions where transformers are loaded with nonlinear and unbalanced loads are especially challenging. The purpose of this work is to derive a three-phase transformer model that is appropriate for evaluating the effects of nonlinear and unbalanced loads. A lumped parameter model instead of a finite element (FE) model is considered in order to ensure that the model can be used in power packages for the calculation of power system transients. The transformer model is obtained by coupling electric and magnetic equivalent circuits. The magnetic equivalent circuit contains only three nonlinear reluctances, which represent nonlinear behaviour of the transformer. They are calculated by the inverse Jiles–Atherton (J–A) hysteresis model, while parameters of hysteresis are identified using differential evolution (DE). This considerably improves the accuracy of the derived transformer model. Although the obtained transformer model is simple, the simulation results show good agreement between measured and calculated results." @default.
- W2072715601 created "2016-06-24" @default.
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- W2072715601 date "2008-10-01" @default.
- W2072715601 modified "2023-09-27" @default.
- W2072715601 title "Nonlinear model of a distribution transformer appropriate for evaluating the effects of unbalanced loads" @default.
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- W2072715601 doi "https://doi.org/10.1016/j.jmmm.2008.04.089" @default.
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