برنامهریزی توان راکتیو در حضور توربین بادی با در نظر گرفتن نایقینی بار و تولید
محورهای موضوعی : مهندسی برق و کامپیوتراحسان محرمی 1 , سعید اسماعیلی 2 *
1 - دانشگاه تحصیلات تکمیلی و فناوری پیشرفته
2 - دانشگاه شهید باهنر کرمان
کلید واژه: مولدهای بادی برنامهریزی توان راکتیو تابع هزینه نایقینی پیشبینی بار پایداری ولتاژ رزرو توان راکتیو محلی,
چکیده مقاله :
مدیریت توان راکتیو در سیستمهای قدرت برای انتقال ایمن توان اکتیو به ویژه زمانی که قسمتی از تولید سیستم به صورت احتمالی و توسط منابع بادی تأمین میگردد از اهمیت اساسی برخوردار است. در این مقاله یک الگوریتم جدید برای برنامهریزی توان راکتیو در حضور مولدهای بادی و با در نظر گرفتن همزمان طبیعت احتمالی این منابع و همچنین نایقینی بار ارائه گردیده است. در این راستا الگوریتم احتمالی پیشنهادی با در نظر گرفتن تابع هزینه هر یک از منابع توان راکتیو از جمله مولدهای بادی، تابع هزینه کلی سیستم را حداقل مینماید. در کنار مسایل اقتصادی، حاشیه پایداری ولتاژ، داشتن رزرو توان راکتیو کافی در هر ناحیه کنترل ولتاژ و احتمال تراکم خطوط نیز به عنوان جنبههای تکنیکی برنامهریزی توان راکتیو به خوبی مورد مطالعه و بررسی قرار گرفتهاند. از دیگر مزیتهای این روش نسبت به روشهای قبلی، لحاظنمودن قابلیت تولید توان راکتیو در مولدهای بادی از نوع سرعت متغیر محدود با ژنراتور القایی تغذیه مضاعف (DFIG) و در نظر گرفتن محدودیتهای مبدل سمت روتور و شبکه در تولید توان راکتیو میباشد. الگوریتم بهینهسازی ارائهشده از یک تکنیک برنامهریزی چندهدفه با استفاده از ضرایب وزنی مناسب برای حداقلنمودن مجموع هزینه تأمین توان راکتیو و تلفات شبکه، به طور همزمان و احتمال تراکم خطوط، همراه با حداکثرنمودن حاشیه پایداری ولتاژ و رزرو توان راکتیو در هر ناحیه در یک ساختار احتمالی برای سرعت باد و پیشبینی بار استفاده مینماید. نتایج شبیهسازی روی شبکه تست 30باسه IEEE بر کارامدی روش پیشنهادی برای شرایط واقعی سیستم تأکید دارد.
Reactive power management is very important in power systems for the secure transmission of active power, especially when a part of system generation is provided by stochastic sources like wind energy. This paper presents a new algorithm for reactive power management in the presence of wind generators and considering the stochastic nature of these sources and load simultaneously .In this regard, the proposed probabilistic algorithm, minimizes the overall cost function of the system considering the cost of each of the reactive power sources including wind generators. Besides economic issues, the voltage stability margin, having sufficient reactive power reserve in each area of voltage control and considering transmission congestion probability as technical aspects of the planning, have been investigated .Another advantage of this method compared to the previous one, is using of doubly-fed induction generator (DFIG) and its capability in providing reactive power considering the constraints of grid side and rotor side converters. The proposed optimization algorithm uses a multi objective function with different weighting coefficients. This algorithm is applied to minimize total reactive power, cost and losses and maximize voltage stability margin and reactive power reserve, simultaneously, meanwhile the probabilistic nature of wind and load forecasting inaccuracy is considered in this algorithm. The proposed method is implemented on the IEEE 30-bus test system and the simulation results demonstrate the effectiveness of proposed algorithm in real conditions for PMSMs against internal faults, especially inter-turn faults.
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