The construction of the ¿grid¿ transmission system in Great Britain

This paper gives an outline of the chief constructional features of the system of high-voltage transmission lines which are being constructed under the provisions of the 1926 Electricity Act. It shows generally how the British system compares and contrasts with existing transmission systems in other countries. The factors influencing the choice of system, types of conductors, towers, substations, transformers and other constructional parts are explained. The chief difficulties which have been encountered, and the steps which have been taken to reduce these to a minimum, are indicated. Individual pieces of apparatus are described from the standpoint of the user and operator. Technical details of the standard units which make up the transmission lines, switchgear, and transformers are tabulated to enable readers to determine overall efficiencies, voltage-changes and other quantities in which they may be specially interested. The diagrams and drawings provide further details as to location of lines and supply points and constructional features of the scheme in general. Concrete examples of work which is in process of construction are given in Part 2 of the paper. Definite engineering costs are included and are reduced to a kVA basis to provide a guide to the present economic position of high-voltage transmission systems in Great Britain