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Fault current limiter based on permanent magnet biased saturation (PMFCL) is believed to foresee preferable application potentials in power systems due to its obvious advantages in both the technical and economical aspects. However, it is necessary to improve and optimize the operational characteristics of a PMFCL as a result of the deep saturation magnetization effect of the iron-core. A new concept...
This paper uses multi-conductor transmission line (MTL) to model transformer windings. According to the symmetry of windings, a 2D equivalent finite element model can be set up under ANSYS environment. On the basis, finite element method (FEM) is used to calculate the distributed parameters in transformer windings. In the process of calculation, the skin effect is focused on. The frequency-dependent...
Main insulation structure for 110 kV electric power transformer is improved based on electric field Analysis. FEM is introduced to calculate the electric filed of primary and improved main insulation structure. The electric field distribution is shown, and maximum electric field intensity and its position are given. The advantage for improved main insulation structure is obtained from the cost comparison...
In HTS transformer the ampere-turn distribution of the windings is usually made lower density than in the conventional transformer for decreasing the magnetic field. Moreover, in our study the secondary winding, different from the primary which is pancake, is chosen helical for cutting down the circulating current among the branches. So there is a difference of magnetomotive force at the same height...
A new and simple procedure for determination of leakage reactance and analysis of electromagnetic forces that acting upon the transformer coils is presented in this paper. Before manufacturing and within the design process, it is required that we model the transformer and analyze the transformer condition using this model. The analysis of electromagnetic forces is essential for mechanical considerations...
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