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Register a new userStudying the effect of reactive power (capacitors) on the working of squirrelcage self-excited induction generator experimentally
دراسة تأثير قيمة الاستطاعة السعوية (المكثفات) على عمل المولد التحريضي ذي القفص السنجابي ذي التهييج الذاتي مخبريا
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يقسم هذا البحث إلى قسم نظري و آخر عملي . يعرض القسم النظري مقدمة عن الطاقات المتجددة و مقدمة عن المولد التحريضي و تحديد مزايا المولدات التحريضية بالمقارنة مع بقية أنواع المولدات بالاضافة لشرح موجز عن مبدأ عملها. يعرض القسم العملي النتائج المخبرية التي التوصل اليها بعد العديد من التجارب.
This research divided into theoretical and practical sections. The theoretical section present an introduction of alternative powers and an introduction of an induction generator and specify advantages of induction generators from other types and present the simple explain of their working principles. Practical section presents the practical results reached after many experiences.
References used
SIMOES-G،2006-Renewable Energy Systems Design and Analysis with Induction Generators.CRC press،USA-p358
ALNUAIM-M،2005-Study of using Induction generator in wind energy applications.Jordan-p59
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This paper deals with the performance study of the self-excited
induction generator when driven by wind turbine for producing
electrical energy. This was done by modeling both the induction
generator and the wind turbine using the Matlab program,
and
depending on the general theory of electrical machines. method for
this system by studying together the mechanical characteristics of
the wind turbine and operating characteristics of the induction
generator.
The out-of-stability state of synchronous generator which
connected to high voltage network due to the transient
situations which lead us to disconnect the generator causes
finincial and technical problems. Therfore the purpose of this
research i
s to study the stability of synchronous generator
working which connected to high voltage network through the
transient situation.This research present the posibilty of
returning the synchronous generator to synchronous-steadystate
at the late time of the transient state when the load
angle is in the out-of-stability zone through controling the
rotor-excitation and increasing the generator’s electric motive
force.This lead to increase the generator’s maximum power
and to increase the generator’s stability-torque which lead to
return the synchronous generator to synchronous-steadystate
without need of discconecting it from network.Then put
the mathmatical model.
The aim of this paper is to discuss the operation of an all silicon-based solution for the conventional Marx
generator circuit, which has been developed for high-frequency (kHz), high-voltage (kV) applications
needing rectangular pulses. The conven
tional Marx generator, for high-voltage pulsed applications, uses
passive power components (inductors or resistors), to supply the energy storage capacitors. This solution
has the disadvantages of cost, size, power losses and limited frequency operation. In the proposed circuit,
the bulky passive power elements are replaced by power semiconductor switches, increasing the
performance of the classical circuit, strongly reducing costs, losses and increasing the pulse repetition
frequency. Also, the proposed topology enables the use of typical half-bridge semiconductor structures,
and ensures that the maximum voltage blocked by the semiconductors equals the power supply voltage
(i.e. the voltage of each capacitor), even with mismatches in the synchronized switching, and in fault
conditions. A laboratory prototype with two stages of the proposed silicon-based Marx generator circuit
was constructed using IGBTs and diodes, operating with about 1000 V dc input voltage and 10 kHz
frequency, with different rise times.
Power Flow control is very important procedure when renewable
sources are connected to electric grid. Furthermore, Most common
topologies of grid tied distributed generation have inductor attached
to power converters.
In this article, the role of
inductors linking between power
converters and electric grid is analyzed. Values of these inductors
can affect largely the value of Power flow (Active and Reactive
power) in both sides, while phase angle between voltage of
terminals determines the direction of power flow.
This paper proposes MATLAB/SIMULINK models to study this
impact, for different operation conditions (four quadrants I-V
curves). Two methods of coils calculation are applied, in order to
design the best value calculated in the proposed
MATLAB/SIMULINK models.
Due to the large and rapid increase in the demand for electricity and the gradual decline of
non-renewable sources of energy (fossil fuels, etc.), the performance of electrical systems
has to be developed so the use of distributed generation and it
s connection with the main
networks is one of these methods but this linkage causes some problems like changing in
electrical voltage.
In this research a radial electric distribution system was simulated and studied the effect of
distributed generation on electrical voltage stability -in static and dynamic state-and its
effect when the generator is synchronous or induction.
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