Transactions of The American Institute of Electrical Engineers. Part Iii: Power Apparatus and Systems 

About: Transactions of The American Institute of Electrical Engineers. Part Iii: Power Apparatus and Systems is an academic journal. The journal publishes majorly in the area(s): Circuit breaker & Induction motor. Over the lifetime, 1813 publications have been published receiving 15904 citations.

The calculation of the temperature rise and load capability of cable systems

Abstract: This Neher–McGrath paper describes a method of esti mating the steady-state temperature of electrical power cables for commonly encountered co nfigurations. By estimating the temperature of the cables, cables’ safe long-term c urrent-carrying capacity (termed “ampacity”) is determined. The paper described two-dimensional highly symmetric simplified calculations which have formed the basis for many cable applicat ion guidelines and regulations. Complex geometries, or configurations that require three-di mensional analysis of heat flow, may require more complex tools such as finite element analysis.

Design Principles of Flux-Switch Alternators [includes discussion]

Abstract: The general problem of the design of a peak-power minimum-volume high-frequency alternator which employs the flux-switch principle is discussed Included in this paper are analyses of general configuration, generated voltage and frequency, magnetic circuit, generator losses, and materials A design procedure which employs the use of a set of empirically derived constants which determine various mechanical and electrical parameters is presented The design charts can be used for flux-switch alternators ranging in power from 100 to 5,000 watts and for shaft speeds from 10,000 to 50,000 rpm A sample design based on the use of the design charts is developed for a 50,000-rpm 3-kw 250-volt single-phase flux-switch alternator with permanent magnet excitation

Tie-Line Power and Frequency Control of Electric Power Systems - Part II [includes discussion]

Abstract: In a previous paper [ibid., vol. 72, pt. III, June 1953, pp. 562-71], the authors presented the results of a study of the performance of two interconnected steam-electric power-generating areas as affected by frequency and tie-line power controllers. The present paper extends this study to include hydroelectric power generating areas as well. As before, the object is to determine theoretically the best values of controller gains, that is, to find those controller settings that will result in best over-all system performance. The principal criterion of good performance is, also as before, the minimizing of any oscillations in tie-line power or system frequency resulting from load disturbances to either area. Thus, stability, rather than rapidity of response, is preferred, since the system actually is continually being disturbed by small and more or less random changes of load, rather than by the step load change used as a test disturbance in the study.