This paper addresses the optimum transformer design problem to minimize the active part cost of three phase core type distribution transformer. The transformer design process involves substantial heuristic exercise to select the design, best suited to a set of specifications. The design problem considers minimization of total cost of core and conducting material, while constraints are imposed o...

When steep lightning surge enters a pole-mounted distribution transformer, the voltage distribution of the internal windings is unbalanced. It is known that a layer-to-layer short or a turn-to-turn short occurs where the voltage distribution of windings is high. In this paper, the voltage distribution of the windings was measured at the primary and secondary sides of the transformer using a tes...

Transformer model; Load flow analysis; Symmetrical components; Distribution systems Abstract This paper presents an efficient approach for developing three-phase transformer admittance matrices in the radial power-flow analysis. The proposed transformer model overcomes the singularity problem of the nodal admittance submatrices of ungrounded transformer configurations. This has been achieved by...

The present paper deals with the analysis and development of noise-reduction transformer that has a filter function for conductive noise transmission. Two types of prototype noise-reduction transformers with two different output voltages are proposed. To determine an optimum design for the noise-reduction transformer, noise attenuation characteristics are discussed based on the experiments and ...

a wind turbine transformer (wtt) is designed using a 3d wound core while the transformer’s total owning cost (toc) and its inrush current performance realized as the two objective functions in a multi-objective optimization process. multi-objective genetic algorithm is utilized to derive pareto optimal solutions. the effects of inrush current improvement on other operating and design parameters...

The E.O. Paton Electric Welding Institute of the NAS of Ukraine together with other organizations of Ukraine develops portable X-ray television equipment capable to perform digital processing of testing results. Radioscopic (on notebook screen) as well as radiographic images in hard copy or other forms can be made using it. Today, flash-memory compatible with any computer became popular carrier...

Abstrac t In the testing of high current transformer performance under interference from external current, it is very difficult to reproduce the high current in adjacent bus-bar or eccentric primary bus-bar. To overcome the testing difficulty, this manuscript presents an effective and simple method named as Non-uniform Equivalent Magnetomotive Force (NEMMF) Method, which uses a single non-unifo...