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Full-Text Articles in Power and Energy

Superconducting Windings In A Power Transformer, An Old Question With A New Answer, James M. Feldman, Bell A. Cogbill, M. S. Sarma Feb 2013

Superconducting Windings In A Power Transformer, An Old Question With A New Answer, James M. Feldman, Bell A. Cogbill, M. S. Sarma

Sarma Mulukutla

This is the second of two papers examining the practicality of superconducting windings for large power transformers. The issues examined in this paper include elements of the behavior of superconducting tapes that would be important in power transformers, the refrigeration requirements for a step-up transformer of practical size, a coil structure appropriate to a superconducting winding and its cryogenic environment, current crowding in the end turns, and an estimate of the energy savings that a practical superconducting transformer could be expected to realize.


Some Aspects Of Power-System Simulation, Analysis And Optimum Control, Mulukutla S. Sarma Feb 2013

Some Aspects Of Power-System Simulation, Analysis And Optimum Control, Mulukutla S. Sarma

Sarma Mulukutla

Modern power systems represent the largest man-made system in existence from the view point of invested capital. With the current rise in the demand of electrical energy, present-day power systems which are large and complex, will continue to grow both in size and complexity. Also, our dependence on electrical energy is so great that it is essential to have uninterrupted supply of electrical power within set limits of frequency and voltage levels, and that it becomes a dire necessity to develop methods for effective control and operation of power systems. Continual modification and improvement of power-system simulation are required to …