یک مبدل بدون ترانسفورمر بسیار افزاینده جدید با ریپل جریان ورودی پایین برای سیستم های فتوولتائیک
الموضوعات :کرار سعد فرج 1 , مجید دلشاد 2 , ومیض ریاض عبدالعظیم 3 , محمد روح اله یزدانی 4 , بهادر فانی 5
1 - دانشکده مهندسی برق، واحد اصفهان (خوراسگان)، دانشگاه آزاد اسلامی، اصفهان، ایران
2 - دانشکده مهندسي برق، واحد اصفهان (خوراسگان)، دانشگاه آزاد اسلامی، اصفهان، ایران
3 - دانشکده مهندسی، دانشگاه بغداد، بغداد، عراق
4 - دانشکده مهندسي برق، واحد اصفهان (خوراسگان)، دانشگاه آزاد اسلامی، اصفهان، ایران
5 - دانشکده مهندسي برق، واحد اصفهان (خوراسگان)، دانشگاه آزاد اسلامی، اصفهان، ایران
الکلمات المفتاحية: مبدل¬های بسیار افزاینده, کلیدزنی نرم, مدولاسیون پهنای پالس, کلیدزنی در ولتاژ صفر,
ملخص المقالة :
در این مقاله یک مبدل بسیار افزاینده با بهره ولتاژ بسیار بالا و ریپل جریان ورودی پایین برای سیستمهای فوتو ولتاییک ارایه شده است. از ویژگی اصلی مبدل عدم استفاده از سلفهای ترویج شده و افزایش بهره با استفاده از خازنهای سوییچ شده می باشد لذا حجم و وزن مبدل بسیار کاهش یافته است. مدار کمکی شرایط کلیدزنی در ولتاژ صفر را برای سوییچهای اصلی و کمکی فراهم کرده است و به علت تعداد المان پایین راندمان مبدل بطور محسوس بهبود یافته است. ریپل جریان ورودی مبدل بسیار پایین است که موجب می گردد دنبال کردن ماکزیمم توان از سلولهای فوتوولتایک ساده گردد. به علت افزایش بهره و کاهش استرس ولتاژ روی سوییچها امکان استفاده از سوییچها با مقاومت پایینتر فراهم گشته و تلفات هدایتی متعاقبا کاهش می یابد. همچنین به خاطر عملکرد مکمل سوییچها طراحی مدار کنترل ساده می باشد و کنترل مبدل بصورت PWM باقی می ماند. مبدل در توان 110 وات و خروجی 330 ولت در نرم افزار PSPICE شبیه سازی شده است و در نهایت یک نمونه عملی از آن ساخته شده و نتایج آزمایشگاهی نتایج شبیه سازی را تایید می کنند.
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