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کد مقاله : TEEGES-2305-1073 (R1) بازدید : 311 صفحه: 18 - 37

10.30486/teeges.2023.1986388.1073

نوع مقاله: پژوهشی

ارائه ساختار بهبود یافته و استراتژی کنترلی تطبیقی برای سیستم خورشیدی با قابلیت بهبود کیفیت توان در ریزشبکه جزیره ای

محورهای موضوعی : مهندسی برق قدرت

رضا قبادی نژاد 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)
غضنفر شاهقلیان 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)

تاریخ دریافت : 1402/02/27 تاریخ پذیرش : 1402/05/17 تاریخ انتشار : 1402/12/01

کلید واژه: کیفیت توان, کنترل‌کننده تطبیقی, ریزشبکه جزیره‌ای, محدودسازی جریان,

چکیده مقاله :

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.

چکیده انگلیسی:

Due to the ever-increasing price of fossil fuels and growing concerns about environmental pollution, the utilization of renewable resources, such as photovoltaic (PV) systems, has witnessed significant growth. However, the lack of an optimal structure and control strategy for PV systems poses a crucial challenge in fully exploiting their potential capabilities. This article proposes a suitable structure and adaptive control strategy for PV systems, enabling the maximum utilization of PV system capabilities in island microgrids. The proposed control structure and strategy are based on a two-stage converter, facilitating maximum power point tracking in PV, injecting the generated PV power into the microgrid with minimal harmonic levels, and improving the power quality of the microgrid by compensating for harmonic components. In this method, the tasks of the DC/AC converter, including the injection of PV active power into the microgrid, provision of reactive power, and harmonic compensation, are prioritized and managed by considering the current peak limitation to prevent inverter overcurrent. Additionally, an adaptive controller is designed to enhance the accuracy and speed of power control. The proposed structure and strategy have been evaluated by simulating a sample microgrid in MATLAB/Simulink. The simulation results demonstrate that the proposed method enables the PV system to operate at maximum power with minimum harmonic levels, leading to a significant improvement in the speed and accuracy of the control system and enhancing the power quality of the islanded microgrid.

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