摘要:

The paper deals with the stability, voltage control, and power limits of electric- power systems and machines—more particularly, large alternating-current systems. The subject is dealt with in the following sequence :—Definition of stability.Stability and power limits of simple circuits.Larger power lines.Artificial stability of power lines.Natural stability and power limits of alternators and synchronous machines.Short-circuits and transient stability of alternators.Internal reserve of excitation of synchronous machines.Artificial stability of alternators.Stability of exciters.Types of electric power supply systems.Feeders and transmission lines and their voltage control.The conclusions reached are that synchronous machines can be made sufficiently stable for all the usual purposes of power supply, and that the power limit and voltage regulation of transmission circuits depend principally on their series reactance.

DOI:10.1049/jiee-1.1927.0066

出版商:IEE    

年代:1927

数据来源: IET

DOI:10.1049/jiee-1.1927.0071

出版商:IEE    

年代:1927

数据来源: IET

摘要:

The subject “Results of Research on Insulating Oils” having been placed on the agenda for the meeting in June 1925 of the Paris Conference on Large High-Tension Electric Supply Systems, this paper was prepared as a contribution from the British delegation.The early experiences with oil as an insulating and cooling medium are first briefly reviewed, showing the recognition of the several essential characteristics. The paper then shows the fundamental attack which has been made upon the sludge problem in Great Britain, and outlines the organized research inaugurated by the Institution and continued by the Electrical Research Association. The results obtained are briefly reviewed.A Bibliography is attached, and certain Reports of the Electrical Research Association which have been published in theI.E.E. Journalwere included as Appendices to the paper when presented to the Paris Conference.

DOI:10.1049/jiee-1.1927.0073

出版商:IEE    

年代:1927

数据来源: IET

摘要:

The paper describes the essential features of the apparatus required for the supply of electrical energy of suitable voltage for the operation of radio receiving apparatus, by the utilization of public electric supply systems. The common features, and the differences between apparatus for d.c. and for a.c. supplies, are pointed out, and the leading features of the design of the filtering system are given. Experimental investigation of the electrical properties both of the filter circuits and of the complete supply appliances is described.Descriptive names are proposed for these devices, and suggestions are made with regard to the proper rating of these appliances in terms of their output. The need for such rating is emphasized, together with the difficulties of properly expressing all the factors involved.Rectifying arrangements are described for use on a.c. circuits, and the paper concludes with a consideration of the precautions necessary in the use of apparatus of this type.

DOI:10.1049/jiee-1.1927.0075

出版商:IEE    

年代:1927

数据来源: IET