معرفي يک مبدل SEPIC غير ايزوله جديد با بهره و راندمان بالا براي سيستمهاي فتوولتائيک
محورهای موضوعی : مهندسی برق و کامپیوتر
مسعود محمودي
1
(دانشگاه اصفهان)
بهزاد میرزاییان دهکردی
2
(دانشگاه اصفهان)
مهدی نیرومند
3
(دانشگاه اصفهان)
کلید واژه: الگوریتم‌های بهینه‌سازی انرژیهای نو توربین بادی مزرعه بادی طراحی جانمایی,
چکیده مقاله :
در اين مقاله يک مبدل غير ايزوله SEPIC جديد که براي کاربردهاي فتوولتائيک مناسب مي‌باشد، معرفي و آناليز شده است. به علت پايين‌بودن ولتاژ خروجی سيستم‌های فتوولتائيک و نياز به ولتاژ خروجی بالا در بسياری از کاربردها از جمله کاربردهای متصل به شبکه، اين مبدل با بهره ولتاژ بالا طراحی شده است. اين مبدل مزايايي از قبيل ولتاژ خروجي بالا با همان استرس ولتاژ مبدل SEPIC عادي و بازده بالا را دارا مي‌باشد. در اين مبدل کليد تحت شرايط ZVS در حالت روشن‌شدن و ZCS در حالت خاموش‌شدن عمل مي‌کند، به همين دليل تلفات سوئيچينگ کاهش مي‌يابد.
In this paper, a new non-isolated SEPIC converter for photovoltaic application is introduced and analyzed. Regarding to low output voltage PV panel and high voltage application of PV systems, a high gain converter is designed. This converter has advantages such as high output voltage gain while keeping the switch voltage stress equal to a regular SEPIC converter, improve the turn-on and turn-off transients of the switch and high efficiency. Also, switching losses and EMI noise are reduced by soft switching method. The MOSFET operates at zero-voltage-switching (ZVS) turn-off and near zero-current-switching (ZCS) turn-on.
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