Amorphous alloy core distribution transformers
Article Abstract:
The development of amorphous metals, their application in distribution transformers and possible future improvements to these technologies are discussed. The metals were first formed by metal-vapor deposition at cryogenic temperatures. Amorphous metals are some of the hardest man-made materials in existence. They exhibit Vicker's hardness of about 1000, or up to five times the hardness of silicon iron, yet they are easy to work and form. These properties make them excellent structural materials, although they are hard to cut, slit or punch. Their properties, thinness, lower space factor stress sensitivity, toughness and brittleness, also create some challenges for the distribution transformer designer. Practical core designs that help assuage these challenges include cruciform, toroidal, distributed gap core and lap-joint core.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1991
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Composite generation/transmission reliability evaluation
Article Abstract:
An accurate system model is the primary tool for evaluating system reliability. Electric power distribution networks present challenges in evaluating the reliability of composite electric power generation and transmission systems. Some of the methods and computational techniques used in evaluating composite generation/transmission reliability are presented. These include a conceptual framework for reliability evaluation, characterization of system states, selection of a system state, assessment of the selected state, estimation of reliability indices, sensitivity analysis and techniques for reducing computational effort. Case studies illustrate the various approaches.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1992
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Amorphous alloy core distribution transformers
Article Abstract:
A key improvement in transforming energy without loss is to substitute transformer cores made of amorphous metals for traditional silicon-steel cores. The magnetic properties of amorphous metals require less exciting energy than silicon-steel alloy cores so that they require less power to maintain a given flux density during operation. They also have lower hysteresis losses, which reduces operating losses. To date, there are about 40,000 amorphous core transformers in use worldwide. However, their high cost represents a serious obstacle to widespread use. Further research and development is expected to improve the technology.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1991
User Contributions:
Comment about this article or add new information about this topic:
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