Prospects for Superconductive Generators in the Electric Utility Industry

Jefferies, M. J.; Gibbs, E. E.; Fox, G. R.; Holley, C. H.; Willyoung, D. M.

doi:10.1109/tpas.1973.293714

Cited by 14 publications

(5 citation statements)

References 4 publications

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“…22 Jefferies et a/. 23 have reviewed the future prospects for superconducting generators, and they concluded that a large superconducting generator will have a power density of 3:1 in comparison with a conventional generator, so that, together with certain other advantages, this concept is a very likely contender for a 2000 MW machine.…”

Section: Design Aspectsmentioning

confidence: 99%

Future trends in electricity generation

Hawley¹

1974

Electron. Power UK

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Section: Design Aspectsmentioning

confidence: 99%

Future trends in electricity generation

Hawley¹

1974

Electron. Power UK

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“…In the first place it must be made clear that we have not yet reached the limit of unit rating with present technology, probable design improvements and innovations, probable improved material properties, and well-understood and already available methods of strengthening the transmission network. Indeed some of our colleagues have recently published (Jefferies et al 1973) certain of the results of design studies of two 2000 MVA generators, one 2-pole and one 4-pole, for comparison with designs they had made of two similar generators having super conductive field windings. Further, they have concluded that: 'Present generator cooling technology, stator winding short-circuit and vibration control, and improved materials can be developed to provide conventional generators in the ratings predicted for the 1980's'.…”

Section: Future Trendsmentioning

confidence: 99%

“…One of these is the superconductive field winding. As in the case of many new ideas, closer inspection has revealed both benefits and disadvantages (Jefferies et al 1973). On the plus side are: reduced size and weights (to about one-third), higher efficiency (by about 0.4 %), some what improved stability, among others.…”

Section: Superconductive Generationmentioning

confidence: 99%

“…The relative cost, and especially the relative reliability and availability, must be determined by further research and development. It has been calculated (Jefferies et al 1973) that an increase of about 1 day per year of forced outage would completely wipe out the savings produced by the 0.4 % increase in efficiency mentioned above.…”

Section: Superconductive Generationmentioning

confidence: 99%

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A Discussion on recent advances in heavy electrical plant - Future developments of large electric generators

Concordia

1973

Phil. Trans. R. Soc. Lond. A

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Several observations can be made with respect to the continual development of large electric generators: 1. The tendency toward always increasing ratings, and especially toward increasing the rating for a given physical size. 2. The thermal problems of cooling and the mechanical limits of various stresses (for example, stresses in electrical windings, in shafts, and in rotor parts subjected to centrifugal force), overspeed on loss of load, critical speeds, and torsional oscillations. 3. The electrical questions of insulation, appropriate voltage rating, reactances, and excitation requirements. 4. Features related to the system requirements: reactances, rotary inertias, reactive power capability, rated and operating power factor, and unbalanced loading. 5. The type of steam generator as it may influence a tendency to use 4-pole generators, and the environmental considerations (i.e. thermal discharges) which may influence the prime-mover inertia. 6. Considerations of machine protection in view of the increased importance of large generating units and of the possibly different winding arrangements and heavy loadings. The history of large electric generators may seem to indicate that we have always been near the frontier of knowledge and experience, and it has required some courage to predict with confidence a continued growth in rating. In spite of this, new concepts, research, development, and design studies have so far continued to open up a path to permit further increases in ratings, and it appears that this process can still be depended on for some time in the future.

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“…Since the time o f t h a t study, there has been much study of superconducting machines, and several authors have published papers on the subject (3,4,5). Q u i t e a l o t has been learned about superconducting alternators, both through study and through experiment (6,7,8,9).…”

Section: Introductionmentioning

confidence: 99%

A design concept for large superconducting alternators

Kirtley

Furuyama²

1975

IEEE Trans. on Power Apparatus and Syst.

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The n e c e s s i t y f o r system damping and f a u l t s u r v i v a l have imposed requirements on superconducting a l t e r n a t o r s n o t c o n s i d e r e d i n e a r l l e r s t u d i e s . These requirements impinge mostly on the rotor shielding system, and seem t o i n d i c a t e a two-component r o t o r damper/shield. Projections o f machine s i z e and performance i n d i c a t e t h a t even w i t h t h e new requirements, superconducting machines retaln their projected advantage over conventional machines.

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Prospects for Superconductive Generators in the Electric Utility Industry

Cited by 14 publications

References 4 publications

Future trends in electricity generation

Future trends in electricity generation

A Discussion on recent advances in heavy electrical plant - Future developments of large electric generators

A design concept for large superconducting alternators

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