摘要:

The paper calls attention in the first place to the consumption of coal in the United Kingdom, and the less of heat which is taking place in electric generating stations.It suggests the combination of heat distribution with the generation of electric current as a possible means of using the coal to better advantage.It further proposes the conversion of some of the existing generating stations which would be shut down under the superstation scheme, and which are conveniently situated, into heatdistribution stations generating electric current as a by-product, and the linking up of such stations with the super-stations.The paper gives some particulars of a typical district showing the probable heating and lighting loads, and finally describes installations; already carried out in this country.

DOI:10.1049/jiee-1.1922.0014

出版商:IEE    

年代:1922

数据来源: IET

摘要:

In the following opening remarks, I do not pretend to have gone very deeply into the subject, the object being merely to suggest points for discussion in the light of my own personal experience of the practical difficulties encountered in attempting to carry out any schemes such as those under discussion. It is hoped, therefore, that members will consider these remarks in the light of suggestions for the development of a useful discussion.

DOI:10.1049/jiee-1.1922.0015

出版商:IEE    

年代:1922

数据来源: IET

摘要:

This paper discusses the special factors to be considered in designing an interconnecting link between two alternatingcurrent power stations, with particular reference to power factor and power factor control.Equations are given in the Appendix for determining the power factor of the line current with any given load and voltage boost, and the voltage boost required to transmit any given load at a given power factor.The three possible conditions of voltage relationship between the power stations, and their effect on the power factor of transmission, are stated.Various types of booster for controlling the power factor are discussed.The effect of power factor variation is pointed out, and the desirability of fully considering and deciding on the power factor of transmission before installing a line is emphasized.Tables are given to illustrate the effect of transmission power-factor on the cost of transmission and on station power-factors.The synchronizing power of the line is briefly discussed and its value is worked out in the Appendix.

DOI:10.1049/jiee-1.1922.0017

出版商:IEE    

年代:1922

数据来源: IET

摘要:

The merits of the static balancer are compared with those of rotary balancers, the chief disadvantage of the former being that the voltage on the two sides of the three-wire system cannot be regulated without the aid of a mid-wire booster.An arrangement is described whereby this disadvantage can be overcome by the use of tappings other than the central point of the winding of the balancer, rectifying the voltage between these tappings and the central point, and inserting the rectified E. M. F. into the side of the system the voltage of which it is required to raise.

DOI:10.1049/jiee-1.1922.0019

出版商:IEE    

年代:1922

数据来源: IET

DOI:10.1049/jiee-1.1922.0021

出版商:IEE    

年代:1922

数据来源: IET

摘要:

The subject-matter of this paper consists of the results of tests on a three-phase shunt commutator motor manufactured by the Swedish General Electric Company. There are three main divisions:—(a) The operation of the motor, as normally supplied by the manufacturers, with symmetrical brush-gear setting.(b) The operation of the motor with variable brush-gear setting.(c) That portion of the theory, with the vector diagrams, necessary for understanding the operation of the motor.

DOI:10.1049/jiee-1.1922.0023

出版商:IEE    

年代:1922

数据来源: IET

DOI:10.1049/jiee-1.1922.0024

出版商:IEE    

年代:1922

数据来源: IET

摘要:

The paper describes a method of measuring the decrement of a distant transmitting station, which is based on the fact that if a coil aerial be in a plane 45° off the bearing of the station, the current induced in it is 1/√2 of that when on the bearing. This relation is used to get the value of the capacity which will give half the square of the current and hence give the decrement by Brandes's method directly from the values of the capacities.

DOI:10.1049/jiee-1.1922.0026

出版商:IEE    

年代:1922

数据来源: IET

摘要:

The paper criticizes the differences between directional transmission and reception as used in navigation and describes in particular a number of directional transmission methods which have been developed by the Royal Air Force. These methods include several in which the determination of a bearing depends on the timing of the moment of equality of signals as heard in the receiver, and also include a new class of directional transmitters in which a characteristic of the radiation, such as a particular wave-length, is alloted to each direction in azimuth.

DOI:10.1049/jiee-1.1922.0027

出版商:IEE    

年代:1922

数据来源: IET