عنوان پایان‌نامه
ارایه یک استراتژی کنترلی مناسب برای ردیابی نقطه توان بیشینه آرایه های خورشیدی در شرایط سایه جزیی
- مقطع تحصیلی
- کارشناسی ارشد
- محل دفاع
- کتابخانه مرکزی پردیس 2 فنی شماره ثبت: E 2775;کتابخانه مرکزی -تالار اطلاع رسانی شماره ثبت: 70152
- تاریخ دفاع
- ۰۷ شهریور ۱۳۹۴
- دانشجو
- علیرضا رامیار
- استاد راهنما
- شاهرخ فرهنگی, حسین ایمان عینی
- چکیده
- این پایان نامه یک استراتژی کنترلی جدید برای ردیابی نقطه ی بیشینه توان آرایه های خورشیدی پیشنهاد داده است. این روش برخلاف روش های معمول ردیابی نقطه ی توان بیشینه آرایه های خورشیدی قادر است که در شرایط بروز پدیده سایه جزئی هم به خوبی عمل کند. در شرایط سایه جزئی مشخصه توان-ولتاژ آرایه های خورشیدی برخلاف شرایط تابشی یکنواخت چند قله ای است. در صورت ردیابی اشتباه نقطه توان بیشینه آرایه ها این امکان وجود دارد که بخش قابل توجهی از توان تولیدی آرایه از دست برود. بنابراین ردیابی درست قله ی اصلی مشخصه توان-ولتاژ اهمیت زیادی دارد. استراتژی پیشنهادی بر مبنای ویژگی های مشخصه جریان-ولتاژ آرایه های خورشیدی بنا شده است. بر این اساس استراتژی پیشنهادی، روش مرسوم تپه نوردی را اصلاح کرده است تا مناسب کار در شرایط سایه جزئی شود. این استراتژی بسیار ساده بوده و از سرعت قابل قبولی هم برخوردار است. برای مطالعه عملکرد مناسب روش پیشنهادی شبیه سازی های متعددی صورت گرفته است. همچنین برای ارائه نتایج عملی، مبدل افزاینده طراحی و ساخته و صحت روش پیشنهادی در عمل تأیید شده است. واژه‌های کلیدی: ردیابی نقطه ی توان بیشینه، آرایه ی فتوولتائیک، سایه جزئی، مشخصه ی توان-ولتاژ، مشخصه ی جریان-ولتاژ
- Abstract
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[46] حسین ایمان عینی، شاهرخ فرهنگی، "طراحی و ساخت دستگاه شبیه ساز آرایه خورشیدی،" هجدهمین کنفرانس بین المللی برق، 1382، صص 341-350. Abstract: This thesis has proposed a new control strategy for maximum power point tracking of solar arrays. In contrast to conventional MPPT methods, this strategy works properly in partial shading conditions. In such conditions, the power-voltage characteristic of PV arrays is multi-peak. If the MPPT method fail in tracking the global peak, a considerable amount of power may be lost. Accordingly, it is important to track the global peak accurately. The proposed method is based on features of the current-voltage characteristic of PV arrays. This strategy has modified the Hill Climbing (HC) method to work properly in partial shading conditions. In addition, the proposed method is fast and simple for experimental implementation. The advantages of the proposed method are validated through simulation case studies in MATLAB\SIMULINK. Also, a boost DC-DC converter has been designed and its accuracy has been experimentally investigated in detail. Key words: Maximum power point tracking, photovoltaic array, partial shading, power-voltage characteristic, current-voltage characteristic.
