الفهرس 
Chapter 1 INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 246 |  |  |
| | | from | 246 | | |
Abstract
Power quality of grid connected wind turbine is a concept to characterize an
essential set of parameters that determine the impact of such wind turbines on the
voltage quality of an electric power network. It applies to both transmission and
distribution networks, but is far more essential for the latter which are more
susceptible to voltage fluctuations. Considering the frequently occurrence of
power quality problems in the distribution systems, in addition to the new trend
for using wind turbines as a new distributed generators (DGs), the power quality
analysis of the distribution system considering wind turbine DGs become
imperative importance. In this thesis it is introduced a comprehensive study of the
power quality problems for radial distribution systems with embedded wind
turbine distributed generators. Proposed solutions for the founded problems have
been introduced. The major contributions of the thesis can be summarized as,
· Comprehensive investigation of the power quality problems for distribution
systems with embedded wind turbine distributed generators have been carried
out. The steady state voltage profile of the distribution system with different
penetration ratios of wind turbine DGs and connection points is investigated.
Voltage sag, voltage swell and voltage interruption during load variations and
system disturbances are considered. Also, voltage fluctuation and flicker
resulting from the wind speed variation and load variations are investigated.
Furthermore, the harmonic distortion supplied by the wind turbine DGs and
the nonlinear loads are investigated.
· A proposed analytical technique, based on new power loss formula, for
optimal wind turbine DGs placement on radial distribution systems is
introduced. The introduced analytical technique can overcome the defects of
other analytical methods. Furthermore, a large reduction in the computation
time, as compared with the other presented methods, has been achieved. The
introduced technique is applied to the 33-bus and the 69-bus balanced
distribution systems. A modification to the introduced analytical technique
for wind turbine DGs optimum placement on unbalanced distribution systems
is introduced and applied to the 25-bus unbalanced distribution system. Also.