Masters Theses


Sabi J. Asseo


"The synchronous machine can be regarded as the most important electrical device in today's industry and civilization. Although many improvements in the development of powerful electronic devices have been made, in recent years, the importance of the electrical power engineering field can never be overlooked in any way.

Most of electrical power engineering problems have been studied in the first quarter of the present century, and the results applied to industry for the betterment of electrical power production. As distribution and transmission systems used become extensively large, new problems such as the stability of interconnected power systems, have been introduced. The exact mathematical analysis of complicated power systems is possible to-day by applying tensorial analysis, or by using differential analyzers.

Many apparatus, such as relays, circuit breakers, lightening arresters, have been developed and improved in order to protect the alternators and transformers, and to provide a reliable and stable operation of power plants, Stability problems have necessitated the introduction of high speed relays and relays equipped with rapid reclosing devices. The design of such equipments and of many others, and the analysis of stability problems requires an extensive study of transients which will be present after occurrence of a system disturbance. It is well known that the initial short circuit current for a fault at the bus can be four or five times as large as the steady state short circuit current; the open phase voltage for an unbalanced short circuit at the high voltage transmission line up to 10 times the rated voltage; the initial current of a transformer which is connected to the bus, as high as five to six times the rated current.

The study of such problems is called transients and the scope of this work is to study the Transients in Synchronous machines"--Introduction, pages vi-vii.


Tingley, Freeman Thayer


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering


Missouri School of Mines and Metallurgy

Publication Date



xiii, 198 pages

Note about bibliography

Includes bibliographical references (pages 195-197).


© 1958 Sabi J. Asseo, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Electric machinery, Synchronous
Transients (Electricity)
Electric power system stability

Thesis Number

T 1164

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