یک کنترل کننده فازی برای ژنراتور مغناطیس دائم داخلی استفاده شده در سامانه تبدیل انرژی بادی

نویسندگان

1 دانشگاه اصفهان

2 دانشگاه تهران

چکیده

   


در این مقاله، یک رهیافت مبتنی بر منطق فازی برای کنترل سامانه­های تبدیل انرژی بادی کوچک در بازه وسیعی از سرعت باد ارائه شده است. سامانه مد نظر به یک توربین با پره های ثابت، ژنراتور سنکرون مغناطیس دائم داخلی و یکسو ساز PWM مجهز شده است. هدف از روش پیشنهاد شده، ردیابی توان بیشینه در سرعت­های باد زیر سرعت باد نامی و دریافت توان نامی ژنراتور در سرعت­های باد بالاتر از سرعت نامی است. برای کنترل ژنراتور از روش کنترل مستقیم گشتاور مبتنی بر مدولاسیون بردار فضایی موسوم به SVM-DTFC بهره گرفته شده است. گشتاور مرجع توسط یک کنترل کننده منطق فازی و با هدف ردیابی توان بیشینه تعیین شده است. از سوی دیگر یک روش جامع برای تعیین شار مرجع ارائه شده است که کارکرد ماشین بالاتر از سرعت محور نامی، محدود سازی گشتاور مرجع تولید شده و کاهش تلفات مسی را تضمین می­کند. این اهداف توسط یک مسئله بهینه­سازی غیرخطی بیان شده­اند که به صورت عددی و نابرخط توسط روش SQP حل شده است. قابل ذکر است، قوانین کنترل کننده فازی به گونه­ای تعیین شده است که نه تنها در زیر سرعت باد نامی ردیابی سریع و دقیقی را نتیجه دهد بلکه -وقتی گشتاور مرجع توسط رهیافت تعیین شار مرجع محدود می­شود- از افزایش بی دلیل گشتاور مرجع جلوگیری کند. به کمک اعمال ساختار کنترلی پیشنهاد به یک توربین kW 10 تجاری شبیه­سازی شده در محیط MATLAB/Simulink ، عملکرد ساختار کنترلی پیشنهاد شده ارزیابی شده است.

کلیدواژه‌ها


عنوان مقاله [English]

A Fuzzy Logic Controller for IPMSG used in Wind Energy Conversion System

نویسندگان [English]

  • Ahmadreza Shafie 1
  • Behzad Mirzaeian Dehkordi 1
  • Shahrokh Farhangi 2
  • Arash Kiyoumarsi 1
1 University of Isfahan, Isfahan, Iran
2 University of Tehran, Tehran, Iran
چکیده [English]

In this paper a fuzzy logic based approach is presented for control of small-scale Wind Energy Conversion System (WECS) over wide operating range. The considered WECS is equipped with fixed-pith blades and an Interior PM Synchronous Generator connected to a full-scale PWM rectifier. The proposed control strategy aims to track maximum power point at underrated wind speeds and harvest rated power of generator at overrated wind speeds. The space vector modulation-based direct torque control method is used to track the electrical torque and flux references. The reference of electrical torque is provided through a Fuzzy Logic Controller (FLC) achieving the maximum power point tracking. On the other hand, the reference flux magnitude is provided through a comprehensive strategy guarantying the machine operation over nominal rotational speed, limitation of the generated reference torque and copper-loss minimization. These are formulated as a nonlinear optimization problem which is solved numerically offline using the well-known sequential quadratic programming method. It should be noted that, the fuzzy rules are designed in such a way that not only result fast and accurate tracking performance at underrated wind speeds but also avoids irrational growth in reference electrical torque when the reference torque is limited by reference flux providing strategy. The proposed control strategy is verified by applying the strategy to a commercial 10 kW wind turbine simulated in MATLAB/Simulink.

کلیدواژه‌ها [English]

  • Direct-drive PMSG
  • Fuzzy Logic Control
  • SVM-DTFC
  • Wind Energy Conversion System

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