الفهرس 
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Abstract
This thesis aimes towards the development of a method for the a-luation of an equivalent network model ( ENM ) of a power ==em subjected to harmonic sources. This method is based on the -monic power flow ( HPF ) analysis of the harmonic component as
as the analysis of systems with nonsinusoidal voltages and ,-rents. The harmonic source is represented by a power converter ,ile the harmonic component is represented as an injected current
the bus that contains the harmonic source. The developed ENM intains the topology of the original power network. with dified values of line admittances. Hence, the proposed ENM can
used with standard computer packages representing the steady
dynamic states of electrical power systems when these systems -fain harmonic sources, as if they operate at normal power equency only. Numerical tests are conducted on the 5-bus and EE 30-bus systems. Computer results show the success of the oDosed technique.
The thesis is divided into six chapters and two appendices. A
neral overview on the effect of harmonics on power system
=-ration is fully presented in chapter 1. Chapter 2 introduces a
technique for the load flow study of a power system working
Ly under the effect of a harmonic injection current source