ICE - Institution of Civil Engineers - Virtual Library

Power supplies c. R. Bayliss, BSc, MSc, PhD, CEng, FIEE H The development of the power system for 5. The load has a large traction content with its inherent unbalance and high harmonic content. Consequently, itis essential that the connection is made toan electrically `strong' The power system for theChannel Tunnel is network to reduce the effectof these disunusual in that it normally has two indepenturbances on other consumers. This necessident sources of supply, onefrom the French tated a connectionat 400 kV and the nearest and one from the British grid systems which existing sub-station was at Sellindge approxmust never be paralleled...

Proc. lnstn Ciu. Engrs, Part 2, 1985,79, Mar.,149-165 PAPER 8885 STRUCTURAL ENGINEERING GROUP A study of twenty-five year oldpulverized fuel ash concreteused in foundation structures J. G. CABRERA, Dipl. h g . * G. R. WOOLLEY, FICEt It is unusual for detailed records to be preserved beyond the construction stages of reinforced concrete structures, but one exception occurs in the case of the concrete foundations of the 275 kV substation at High Marnham Power Station built in 1957. Twenty-five years of later these foundations have been examined in detail and the Paper presents findings this examination...

312 OBITUARY and working of cables, transformers, and switchgear for 132 kV and lower voltage substations in Lancashire, Cheshire, and Cumberland. During World War he was concerned with urgent extensions Central I1 to the Electricity Board's grid system to ensure bulk suppliesto wartime factories, based mainly in the West Country, and from 1946-52 wasresponsible to the Board for 275 kV super-grid lines and sub-stations. He was also responsible for several reports on theuse of power stations for heating as well as lighting. On the death of Mr S...

Proceedings.] ELECTRIC RAILITAY DISTRIRUTION. 111 Correspondence. Mr. PHILIP DAWSON read the Paper with great interest, but Mr. Dawson. had considered it unfortunate that the Author should have based his calculations on such data as a schedule speed of 16 miles per hour, station-intervals of 1 mile, and a train-weight of 100 tons, since these were not representative of the usual conditions which obtained in the case of suburban-railway electrification inGreatBritain. Although the methods of calculation might be sufliciently flexible to enable variations in the fundamental data to be substituted, the particularresultssetforth inthe Tables andcurvesmight, in Nr...

~roceedings.1 PARSHALL ON ELECTRIC RAILWAY DISTRIBUTION. 4'7 17 Kovember, 1914. BENJAMINHALLBLYTH, M.A., President, in the Chair. The PRESIDENT, i n announcing the death of Mr. E. B. Ellington, meeting day that the Member of Council, said that at their Council had passed the following resolution :-" That the Council record the very deep regret with which they have learned of the death of their esteemed colleague, Mr. Edward Bayzand Ellington, and desire to convey to Mrs...

Suitable electrical connections from the generators on the Severn Barrage to the 400kV substations on the shore are identified together with suitable reinforcements for the 400kV national grid. How the proposals were reached together with the studies done to check their principal features are described. Load flows and fault studies show that some unconventional solutions are required for both the low voltage and the high voltage systems. Generating and pumping modes have been considered. Reliability is a prime factor in the design and physical constraints are taken into account.

• General Design Considerations

• Generator Connections

• Barrage Substations

• Cable Compensation

• Cable Reliability

• System Earthing

• Alternative 8.6kV Connections

• Arrangement of Electrical Equipment

• Generator Controls

• System Studies

• Grid Reinforcement

• Stability

• Costs of Grid Reinforcement

9s DISCUSSIOK Oh' ECOSOXIICS OF [Xnut.es of Discussion. T~C president. The Buthor. The PRESIDEST moved a vote of thanks to the Author. The AuTnoR explained that his object i n preparing the Paper had so far as electrictractiorl been nottointroduceanythingnovel was concerned, but to furnish by his calculations, based principally of theCentralLondon on 14 years'experienceoftheworking Railway installation, which was the first of its kind, and which had beenproved t o be both economical andeficient,whatmightbe termed a labour-saving device. I n his own professional experierlce it had happened from time to time that a traction system had to be designed, t h e transmission system being more or less predetermined, the and designing of suchsystem the a for most economical working was found to involve a long and laborious set of calculations, especially i n cases where the energy-cost was high...

Proceedings.] DALZIEL AND SAYERS ON ELECTRIFICATION. 47 (Paper No. 3847.) " TheSingle-phase Electrification of the Heysham,Morecambe and Lancaster Branch of the Midland Railway." By JAMES DALZIEL and JOSIAH SAYERS. ELECTRIC TRACTION RAILWAYS. ON IN 1900 the late Mr. W. Langdon read a Paper before the Institution of ElectricalEngineers, in which he described with some detail a suggested means of electrifying the Midland Railway from London to Bedford, based on the ordinary third-railsystem of high-pressure current distributed to sub-stations, and there converted to low pressure for use on the line...

Proceedings.] SNELL ON DISTRIBUTION OF ELECTRICAL ENERGY. 143 23 November, 1904. Sir GUILFORD L. MOLESWORTH, E.C.I.E., President, in the Chair. (Paper No. 3522.) " Distribution of Electrical Energy." By JOHN FRANCIS CLEVERTON SNELL, Inst. C.E. M. SINCE Papers were presented by Colonel Crompton in 1891, and Mr. A. H. Preece i n 1898, the question of the distribution'of electricalenergyhasnot been before theInstitution.TheAuthor hopes that the increasing importance of electricity in its application to I` the use and convenience of man " will prove sufficient excuse for reviewing in this Paper the progress made since the communications referred to were discussed, and for considering the prospects of a wider commercial use of electrical energy...

Proceedings.] ELECTRICAL ENEBGY. 239 Correspondence. Mr. W. B. Essos stated that before settling on a frequency of 50 JIr. Essen. cycles per second, the Engineering Standards Committee had given very careful attention to the matter, and had certainly not been it the Committee's intention to exclude rotary converters, as being machinery which could not be used a t this frequency. The idea of the Committee was that 50 cycles should be a universal frequency which would suit static transformers, motor-generators and rotary converters alike...