Excerpt from Central Stations
A book on central stations must necessarily relate to the generation, transmission and distribution of electrical energy. Therefore, the present volume deals with these subjects - but it has not been found expedient to classify the material into these three divisions. However, consideration of each of the eighteen different section headings will render it apparent that every section does pertain to either generation, transmission, or distribution. Throughout, the treatment is such that the gist of all which is recorded can be grasped by a reader of modest mathematical attainments. In other words, a practical man can study the book understandingly.
In the opening chapters, after certain elements which occur in all electrical-energy-distribution systems have been defined, the different factors or coefficients which are utilized frequently in central station practice are discussed rather exhaustively. Among these are load factor, demand factor, diversity factor, plant factor and the like. Their application in the design and operation of central-station systems is explained and in many instances illustrated by numerical examples. Next the typical load curves or graphs which are encountered in everyday work are considered. Then the principles of circuit design - both alternating and direct-current - are given attention; examples showing how circuits are computed in practice are worked out in detail. Following the fundamentals just recited, the elements of transmission and distribution are examined. Transmission lines, substations and lightning-protection equipment are treated.
Final chapters in the book concern electrical-energy generating stations and the equipment thereof. Thus automatic voltage regulators, switchboards and switchgear are treated.
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