ساختار جدید کلیدزنی نرم در مبدل DC/DC با ضریب بهره ولتاژ بالا و راندمان مناسب در توان انتقالی بالا
محورهای موضوعی : مهندسی برق و کامپیوترامید شریفیانا 1 , مجید دهقانی 2 , غضنفر شاهقلیان 3 , سید محمد مهدی میرطلایی 4 , مسعود جباری 5
1 - دانشگاه آزاد اسلامی واحد نجف آباد
2 - دانشگاه آزاد اسلامی واحد نجف آباد
3 - دانشگاه آزاد اسلامی واحد نجف آباد
4 - دانشگاه آزاد اسلامی واحد نجف آباد
5 - دانشگاه آزاد اسلامی واحد نجف آباد
کلید واژه: منابع انرژی نو, مبدل افزاینده, تشدید سری, ضریب بهره ولتاژ, کلیدزنی نرم,
چکیده مقاله :
از محدودیت‌های اصلی استفاده از انرژی‌های تجدیدپذیر برای تولید برق می‌توان به کم‌بودن ولتاژ خروجی نیروگاه‌های تولید برق با انرژی‌های نو اشاره کرد. بنابراین جهت بهره‌گیری کارآمدتر از انرژی‌های تجدیدپذیر طراحی یک مبدل با ضریب بهره بالاتر و راندمان بیشتر از اهمیت ویژه‌ای برخوردار است. در این مقاله یک ساختار جدید ارائه شده که هم‌زمان با داشتن یک مبدل افزاینده، تلفات ناشی از کلیدزنی نرم نسبت به روش‌های مرسوم به حداقل رسانده می‌شود. همچنین بر اساس روش ارائه‌شده تنش ولتاژ روی دیودها و کلیدها در حد قابل قبول محدود می‌شود. یک مبدل افزاینده ساده می‌تواند به کمک اضافه‌کردن یک شاخه موازی با ایجاد تشدید سری تا حد قابل ملاحظه‌ای ولتاژ خروجی را افزایش دهد و هم‌زمان کلیدزنی در ولتاژ صفر را ممکن سازد. مبدل پیشنهادی بدون اضافه‌کردن قطعه فعال به مبدل و با ساختار ساده غیر ایزوله در توان 500 وات و ولتاژ 385 ولت دارای ضریب بهره ولتاژ حدود 8/10 و راندمان بیشتر از 93% است. نتایج شبیه‌سازی عملکرد مبدل پیشنهادی را برای حالت‌های عملکردی مختلف نشان می‌دهد.
One of the main limitations of using renewable energies for electricity generation is the low output voltage of power plants with renewable energies. Therefore, the design of a converter with higher gain voltage and higher efficiency is important in the use of renewable energies. In this paper, a new topology that simultaneously has the structure of a boost converter can minimize switching losses by conventional soft switching methods and is also able to reduce voltage stress on diodes and switches Keep to an acceptable level. A simple boost converter can Increase the output voltage significantly by adding a parallel branch by generating a series resonance and enables zero voltage switching at the same time. Suggested converter without adding active element to converter with simple non-isolated structure at 500 watts and 385 volts it has a voltage gain factor of about 10.8 and efficiency of over 93%. The results show the performance simulation of the proposed converter for different performance modes.
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