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Register a new userImpact of Conventional Wind Turbines on the Stability of Power Systems
أثر العنفات الريحية التقليدية في استقرار نظم القدرة الكهربائية
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حسان سويدان( باحث )
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يتزايد عالمياً استخدام العنفات الريحية لتوليد الطاقة الكهربائية، و تختلف من حيث طبيعتها عن المولدات التقليدية إِذ تُستخدم المولدات التحريضية في مثل هذه العنفات على نطاق واسع نظراً إلى بساطة تركيبها و موثوقية أدائها. و مع ازدياد عدد العنفات في المزارع الريحية يتعرض النظام الكهربائي الذي تسود فيه المولدات التزامنية إلى تغيرات في السلوك الديناميكي و محددات التشغيل. هدف البحث إلى تحليل أثر المولدات التحريضية للعنفات الريحية في الاستقرار العابر و استقرار الاهتزازات الصغيرة لنظم القدرة الكهربائية عن طريق الزيادة التدريجية للاستطاعة المولدة بواسطة العنفات الريحية و تغيير مواقع العنفات في النظام الكهربائي.
Worldwide wind turbines have steadily increased. They are very different in nature from conventional generators. Induction generators in large scale are used in wind turbines for their simple construction and reliable operation. With the increase in penetration of wind turbines, the power system dominated by synchronous machines will experience a change in dynamics and operational parameters. This paper aims to analyze the impact of induction generators on transient and small signal stability of power systems by gradually increasing the rate of power generated by wind turbines and changing the location of these turbines in the power system.
References used
Gilbert M. Master, Renewable and efficient electric power system, John Wiley & Sons Inc New Jersy,2004
M. Gody Simoes, Felix A. Farret, Altrnative energy systems, design and analysis with induction generators, CRC Press, New York 2008
M. Reza, J.G. Slootweg, Investigating impacts of distributed generation on transmission system stability, IEEE,2003
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Efforts are being made to connect many wind farms to Syrian electrical network As of Wind turbine the
increases; their Cumulative impact on dynamic operational characteristics of power system will increase.
In this paper, the impact of constant spe
ed wind turbines utilizing squirrel cage induction generators, the
most worldwide spread nowadays, on the transient stability of Syrian power system is analyzed.
Various aspects have been considered like wind turbine penetration level, fault location on power system
overhead lines and network topology transforming.
Results of this study show that wind turbine farms planned to be connected to Syrian electrical network
will have significant impact in improving transient stability parameters (CCT,d).
As the wind turbine penetration level increases, their impact will increase, but still remain dependent on
the fault location and network topology transforming caused by double circuits of overhead lines.
This study aims to analyze the effect of the wind farms on frequency stability of the electrical power network, and the description of the performance of Syrian Electrical Power System with integration of
wind farms in several regions in Syria (Al-Q
uenetera – Al-Hejana - Ghabagheb) through the evaluation of frequency stability of the power system and the Critical Clearing Time (CCT).
The effect of wind farms on the frequency behavior of Syrian network and factors related will be investigated such as generation technology by replacing the power-generated source by two main types
of induction generators, changing the location of wind farms and increasing gradually the rate of wind power.
The simulation analysis will be applied on Syrian Electrical Power System 230KV – 400KV, by using program NEPLAN, which gives access to an extensive library of grid components, and relevant wind
turbine model.
Today worldwide distributed generation (DG) takes a very important role in the operation of
distributed electric power systems. However, the existence of distributed generation may have
impacts on different topics, such as fault currents, fault pro
tection, coordination schemes or
fault location. If there is short-circuit in the system, the presence of one or more distributed
generators can affect the fault current levels, the monitoring of voltages and currents at the
substation. The main supply generation will not have to inject as much power to the line because
of the DG and, therefore, voltages and currents at the substation will be different from the ones
that would be measured without DG .
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 contribution of our research include building an artificial neural
network in MATLAB program environment and improvement of
maximum loading point algorithm, to compute the most critical
voltage stability margin, for on-line voltage stability a
ssessment,
and a method to approximate the most critical voltage stability
margin accurately. a method to create a (ARTIFICIAL NEURAL
NETWORK) approach.
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