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تلفن: ۰۹۲۱۶۴۲۶۳۸۴

دانلود رایگان مقاله مدل سازی کامل نیروگاه بادی گذرای الکترومغناطیسی

عنوان فارسی: مدل سازی کامل نیروگاه بادی گذرای الکترومغناطیسی برای مطالعات یکپارچه سازی شبکه
عنوان انگلیسی: Complete wind farm electromagnetic transient modelling for grid integration studies
تعداد صفحات مقاله انگلیسی : 11 تعداد صفحات ترجمه فارسی : ترجمه نشده
سال انتشار : 2009 نشریه : الزویر - Elsevier
فرمت مقاله انگلیسی : PDF کد محصول : E2494
محتوای فایل : PDF حجم فایل : 500 Kb
رشته های مرتبط با این مقاله: مهندسی برق
گرایش های مرتبط با این مقاله: برق قدرت، الکترونیک قدرت و الکترونیک
مجله: تبدیل انرژی و مدیریت - Energy Conversion and Management
دانشگاه: دانشکده مهندسی برق، دانشگاه باسک، اسپانیا
کلمات کلیدی: تولید برق بادی، مدل سازی سیستم قدرت، تحلیل ماشین دوار گذرا، مدل های دستگاه چند گانه، سیستم های قدرت گذرا ، عملیات عایق سازی
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چکیده

abstract

This paper presents a modelling methodology to analyse the impact of wind farms in surrounding networks. Based on the transient modelling of the asynchronous generator, the multi-machine model of a wind farm composed of N generators is developed. The model incorporates step-up power transformers, distribution lines and surrounding loads up to their connection to the power network. This model allows the simulation of symmetric and asymmetric short-circuits located in the distribution network and the analysis of transient stability of wind farms. It can be also used to study the islanding operation of wind farms.

نتیجه گیری

10. Conclusion

Wind generators have been modelled in terms of the Quadrature-Phase Commutator full transient model, with six electrical state-variables, and two more mechanical. The electrical network from the wind farm common busbar up to the point of common coupling has also been modelled in state-space. Delta-wye connection of the transformer at the wind farm common busbar has also been integrated in the overall model, and rated values of the generators have also been verified. The approximation of aggregated modelling of Squirrel Cage Induction Machines has been discussed in detail, providing the physical meaning of aggregated parameters and variables. The aggregated induction generator works in an average operating point corresponding to average rotor speeds and average stator voltages. But this modelling approach is only valid when all the generators have similar angular speeds. Generalization of this modelling could mask the real evolution of each wind generator that might be very different to the evolution of the re-scaled machine. Steps needed for the simulation of the overall system have been specified. The multi-machine model and the aggregated approximation share the same simulation structure. As a consequence, it is quite straightforward to simulate both models in the same platform. An alternative simplified multi-machine model for validation of the proposed full transient model has been developed. This model is based on the formulation of the impedance matrix of the overall network, as used for the fault analysis problem. The model is simulated according to the particular slip of each generator. Compari-son between results of the full transient model and those of the simplified one shows that, in general, both models predict the same pseudo steady-state behaviours.