ارائه ساختار بهبود یافته و استراتژی کنترلی تطبیقی برای سیستم خورشیدی با قابلیت بهبود کیفیت توان در ریزشبکه جزیره ای

فناوری های نوین مهندسی برق در سیستم انرژی سبز

دوره 2، شماره 4 - شماره پیاپی 8، اسفند 1402، صفحه 18-37   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.30486/teeges.2023.1986388.1073

نویسندگان

رضا قبادی نژاد^{1، 2}؛ غضنفر شاهقلیان^{* 1، 2}

¹دانشکده مهندسی برق، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف‌آباد، ایران

²مرکز تحقیقات ریزشبکه های هوشمند، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران

چکیده

امروزه با توجه به افزایش روز افزون قیمت سوخت‌های فسیلی و همچنین افزایش نگرانی در زمینه آلودگی محیط زیست، استفاده از منابع تجدیدپذیر مانند سیستم‌های فتوولتائیک (PV) افزایش یافته ‌است. با این وجود نبود یک ساختار و استراتژی کنترلی بهینه برای سیستم‌های PV، یک چالش مهم در زمینه استفاده حداکثری از قابلیت‌های بلقوه این منابع محسوب می‌شود. در این مقاله یک ساختار مناسب و همچنین یک استراتژی کنترلی تطبیقی برای سیستم‌های PV پیشنهاد شده که امکان استفاده حداکثری از قابلیت‌های سیستم‌ PV در ریزشبکه‌های جزیره‌ای را فراهم می‌سازد. ساختار و استراتژی کنترلی پیشنهادی مبتنی بر مبدل دو مرحله‌ای است که امکان ردیابی نقطه حداکثر توان PV، تزریق توان تولیدی PV به ریزشبکه با حداقل سطح هارمونیک و همچنین بهبود کیفیت توان ریزشبکه از طریق جبران‌سازی مولفه‌های هارمونیکی را فراهم می‌سازد. در این روش، وظایف مبدل DC/AC شامل تزریق توان اکتیو PV به ریزشبکه، تامین توان راکتیو و جبران‌سازی هارمونیکی با در نظر گرفتن محدود‌سازی پیک جریان اولویت‌بندی و مدیریت می‌شود تا از اضافه جریان شدن اینورتر جلوگیری گردد. همچنین یک کنترل‌کننده تطبیقی طراحی شده که باعث بهبود دقت و سرعت کنترل توان می‌گردد. ساختار و استراتژی پیشنهادی با شبیه‌سازی یک ریزشبکه نمونه در سیمولینک متلب مورد ارزیابی قرار گرفته ‌است. نتایج شبیه‌سازی نشان می‌دهد که روش پیشنهادی امکان بهره‌برداری از سیستم خورشیدی در حداکثر توان و با حداقل سطح هارمونیک را فراهم ساخته و باعث بهبود قابل توجه در سرعت و دقت سیستم کنترلی و همچنین بهبود کیفیت توان ریزشبکه جزیره‌ای می‌شود.

کلیدواژه‌ها

ریزشبکه جزیره‌ای؛ کنترل‌کننده تطبیقی؛ کیفیت توان؛ محدودسازی جریان

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