Off-campus South Dakota State University users: To download campus access theses, please use the following link to log into our proxy server with your South Dakota State University ID and password.

Non-South Dakota State University users: Please talk to your librarian about requesting this thesis through interlibrary loan.


Yin Chen

Document Type

Thesis - University Access Only

Award Date


Degree Name

Master of Science (MS)


Electrical Engineering

First Advisor

Stephen J. Gold


In power systems, it is very useful to regulate voltage at generator stations to keep terminal voltages within ±3% as the loads change. This thesis discusses a method to maintain the terminal voltages constant: a modern voltage regulator for a synchronous generator with a brushless excitation system. It also explores speed/frequency/power controls for a steam turbine-driven generator torque controller. The effects of varying voltage magnitude and angle on real power and reactive power and some aspects of the optimal dispatch are presented. A Computer-Aided-Design Program is used to simulate the performance of an excitation system and prime-mover governor with voltage regulation, which can quickly indicate the general nature of the control actions.

Library of Congress Subject Headings

Electric generators -- Alternating current
Voltage regulators




South Dakota State University