Degree Type

Dissertation

Date of Award

1985

Degree Name

Doctor of Philosophy

Department

Electrical and Computer Engineering

Abstract

The effects of unbalances caused by untrasposed EHV transmission lines and unbalanced loads in power system analysis have been thoroughly analyzed and determined;In the steady-state analysis, it is concluded that three-phase representation of the system is necessary and the unbalance analysis needs to be performed at least once under specific system conditions to ensure a safe and normal operation of the system. The newly developed method is proved to be an efficient approach to be used in this type of analysis;In the electromagnetic transient analysis, it is concluded that untransposed transmission lines have no significant impact on the transient overvoltages caused by single line-to-ground fault clearing and, therefore, may be represented fully transposed. It is noted, on the other hand, that unbalanced loads can affect the transients and must be included in the analysis. It has been shown, however, that balanced initial conditions may be used to represent the network and the loads in the system.

DOI

https://doi.org/10.31274/rtd-180813-8708

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Mahmood Seyed Mirheydar

Language

en

Proquest ID

AAI8604500

File Format

application/pdf

File Size

220 pages

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