Constant-Voltage Transmission: A Discussion of the Use of Synchronous Motors for Eliminating Variation in Voltage in Electric Power Systems. E-book. Formato PDF Herbert Bristol Dwight   -  Forgotten Books, 2017  - 

The new system of constant-voltage transmission has been successfully applied to both large and small power projects, and the results thereby obtained demonstrate convincingly that this method must be closely in vestigated by those responsible for the management or design of electric-power projects. The advantages of synchronous motors for raising the power-factor of the load of a steam-driven station have been thoroughly de scribed. It is, however, not so well known that synchro nous motors are of far greater value with long-distance transmission systems than with local power systems, so much so, in fact, that synchronous motors can often be installed to run idle, and yet save several times their cost.

Transmission Line Formulas for Electrical Engineers and Engineering Students. E-book. Formato PDF Herbert Bristol Dwight   -  Forgotten Books, 2017  - 

The first method, which is described in Chapter III, is in the form Of a chart which gives the regulation or voltage drop of a line, and which also shows directly the required size of conductor for given conditions. In Chapter IV are given formulas for distribution lines and transmission lines only a few miles long. These are extended in Chapter V by means of the constant K to apply to transmission lines of any length in ordinary practice. For purposes of checking different formulas, and for the calculation of extremely long and unusual lines, the fundamental formulas of transmission lines are expressed by rapidly converging series in Chapter VI. While these series require much more arithmetical work than the K formulas, they will give the exact results to any degree of accuracy desired. The method of convergent Series in volves the use of complex numbers, that is, numbers in which j terms appear. They are easier to handle, however, than logarithms, sines and cosines of angles, or hyperbolic functions, and therefore the use of these other mathematical functions has been avoided.