الفهرس 
ABSTRACT
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Abstract
Use of an induction machine as a generatoris becoming popular for
the harnessing the renewable energy resources. Reactive power
consumption and poor voltage regulation under varying load are the
major drawbacks of the induction generator. Hence the steady state
analysis of the machine becomes paramount importance. Different
conventional methods are available to identify the steady state quiescent
operating point under saturation for a given set of speed, load and
excitation capacitor or saturated magnetizing reactance. These methods
determine the saturated magnetizing reactance or excitation capacitor and
per unit frequency. The Newton Raphson (NR) method, a conventional
method used for several decades to analyze the steady state performance
of SEIG but it has some limitations.
In the present thesis, a steady state mathematical of standalone
wind driven induction generator model employing the loop impedance
method is used which results in simple formulation, simple algebraic
calculations with good accuracy, rapid convergence and convenient for
computer solution. A meta- heuristic search technique called Simulated
Annealing optimization (SA) is find dependent variables such as
saturated magnetizing reactance or excitation capacitor and per unit
frequency under varying load is applied. The induction generator
performances based on the above variables using theproposed technique
are evaluated and plotted. Moreover, a comparison between the induction
generator performances using conventional mathematical method
(Newton Raphson) and proposed SA is described.
Flexible A.C. Transmission Systems (FACTS) are the result of the
great advance in power electronics, which is expanding over all electric
power control strategies. The application of this technology opens new
and better opportunities for an appropriate control on the generation,
transmission and distribution areas.
The use of FACTS device called static synchronous compensator
(STATCOM) to control the reactive power and keep the output voltage of
standalone self excited induction generator (SEIG) at rated value under
linear and the required non linear load is presented. The essential feature
of STATCOM is that it absorbs or injects reactive current. There are great
quantities of control strategies which could aid inthe STATCOM control
problem. In this work the use of instantaneous power theory (p – q
theory) and neural network-based controllers are proposed. The two
proposed controller were proved to be excellent for controlling
voltage/current for the SEIG under changes in loads at constant speed.
The simulation results have been given to validate the two proposed
technique.
This thesis investigates the use of a StaticSynchronous Compensator
(STATCOM) along with grid connected wind farms for the purpose of
stabilizing the grid voltage after grid-side disturbances such as changing
the rating of capacitor bank, changing in the transmission line length,
sudden injection of resistive- inductive load, connecting a plant consisting
of an induction motor and resistive load and changing the position of the
STATCOM and loads at constant wind speed. Farther, the effect of wind
speed variation on power system performances is obtained.