ارائه ساختار بهبود یافته و استراتژی کنترلی تطبیقی برای سیستم خورشیدی با قابلیت بهبود کیفیت توان در ریزشبکه جزیره ای
الموضوعات :
رضا قبادی نژاد
1
,
غضنفر شاهقلیان
2
1 - دانشکده مهندسی برق، واحد نجفآباد، دانشگاه آزاد اسلامی، نجفآباد، ایران|مرکز تحقیقات ریزشبکه های هوشمند، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
2 - دانشکده مهندسی برق، واحد نجفآباد، دانشگاه آزاد اسلامی، نجفآباد، ایران|مرکز تحقیقات ریزشبکه های هوشمند، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
تاريخ الإرسال : 27 الأربعاء , شوال, 1444
تاريخ التأكيد : 21 الثلاثاء , محرم, 1445
تاريخ الإصدار : 10 الثلاثاء , شعبان, 1445
الکلمات المفتاحية:
کیفیت توان,
کنترلکننده تطبیقی,
ریزشبکه جزیرهای,
محدودسازی جریان,
ملخص المقالة :
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.
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