فصلنامه علمی کارافن

فصلنامه علمی کارافن

روش کنترل جدید برای مبدل رابط شبکه فتوولتائیک چندمنظوره با درنظرگرفتن ظرفیت نامی اینورتر

نوع مقاله : مقاله پژوهشی (نظری)

نویسندگان
1 استادیار، گروه مهندسی برق، دانشگاه فنی و حرفه‌ای، تهران، ایران.
2 استادیار، دانشکده مهندسی کامپیوتر و صنایع، دانشگاه صنعتی بیرجند، بیرجند، ایران.
چکیده
مطالعات متعدد مزایای به‌کارگیری توابع جانبی را در استراتژی کنترل مبدل‌های رابط شبکه PV نشان داده‌اند. بااین‌ وجود، اکثر آنها اولویت­بندی تزریق توان PV، به‌عنوان وظیفۀ اصلی مبدل­های رابط شبکه PV و محدودکردن جبران­سازی باتوجه‌ به ظرفیت اینورتر را درنظر نمی­گیرند. هدف اصلی این مقاله پیشنهاد یک روش کنترلی جدید برای مبدل رابط شبکه PV چندمنظوره، به‌منظور افزایش کیفیت توان در نقطه اتصال به شبکه با درنظرگرفتن ظرفیت اینورتر است. این روش ظرفیت نامی اینورتر را با فاکتور جریان حداکثر درنظر می­گیرد و جریان اینورتر را محدود کرده تا از اضافه ظرفیت اینورتر جلوگیری کند، و همچنین عملکردهای مبدل را که شامل: تزریق توان اکتیو، جبران­سازی نامتعادلی بار، جبران­سازی توان راکتیو، و جبران­سازی هارمونیک جریان می­شود، مدیریت می‌کند. توجه به حداکثر جریان اینورتر برای حفظ عمر نیمه‌هادی‌ها و اطمینان از نقش اصلی اینورتر در تزریق توان اکتیو به شبکه بسیار مهم است. در این استراتژی تزریق توان اکتیو به شبکه به­همراه جبران نامتعادلی بار بر بهبود کیفیت توان ارجحیت دارد. استراتژی کنترلی بر مبنای استخراج مؤلفه­های اکتیو و راکتیو لحظه­ای جریان برای هر فاز با قاب مرجع متغیر است. استراتژی کنترلی پیشنهادی برای یک مبدل رابط شبکه PV متصل به شبکه دوطبقه در یک سیستم توزیع برق سه­فاز چهارسیمه اجرا می‌شود. شبیه­سازی با استفاده از نرم­افزار MATLAB/Simulink انجام می­شود. نتایج شبیه­سازی و مقایسه با استراتژی کنترلی متداول توان­های لحظه­ای تک­فاز، عملکرد و کارایی مطلوب استراتژی پیشنهادی را از نظر تزریق توان PV، جبران­سازی نامتعادلی بار، جبران­سازی توان راکتیو و جبران­سازی هارمونیک­های جریان بار، بدون اضافه جریان اینورتر، نشان می­دهد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

A New Control Strategy for Multifunctional PV Grid Interface Converter Considering Inverter Rating

نویسندگان English

Hadi Afkar 1
Mostafa Esmaeeli 2
1 Assistant Professor, Department of Electrical Engineering, Technical and Vocational University (TVU), Tehran, Iran.
2 Assistant Professor, Faculty of Computer and Industrial Engineering, Birjand University of Technology, Birjand, Iran.
چکیده English

Several studies have shown the benefits of using auxiliary functions in the control strategy of PV grid interface converters. Most studies do not consider the necessity of prioritizing the injection of PV power into the grid and limiting the compensation according to the available capacity of the inverter. The main goal of this paper is to propose a new control strategy for the multifunctional PV grid interface converter to improve the power quality at the PCC by considering the capacity of the inverter. This strategy considers the inverter's rated capacity in terms of the maximum current factor. This method limits the inverter current to prevent overrating operations of the inverter and also manages the functions of the PV grid interface converter. Limiting the inverter's rated capacity in terms of maximum current is very important not only to preserve the life of semiconductors but also to ensure the primary role of the inverter in injecting active power into the grid. In this strategy, injecting active power into the network along with load imbalance compensation has priority over improving power quality. The control strategy is based on extracting active and reactive components of the current per phase with a variable reference frame. The proposed control strategy for a two-stage grid-connected PV interface converter was implemented in a three-phase, four-wire power distribution system. The simulation was carried out by MATLAB/Simulink software. The simulation results and comparison with the conventional control strategy demonstrated the good performance of the proposed strategy. 

کلیدواژه‌ها English

Multifunctional PV Grid Interface Converter
Current Harmonics
THD
Power Quality Improvement
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دوره 21، شماره 1 - شماره پیاپی 66
فنی و مهندسی
بهار 1403
صفحه 269-296

  • تاریخ دریافت 05 شهریور 1402
  • تاریخ بازنگری 19 دی 1402
  • تاریخ پذیرش 29 بهمن 1402