جبران سازی هارمونیک و کنترل ولتاژ و فرکانس ریزشبکه مبتنی بر توزیع تناسبی توان با استفاده از روش امپدانس مجازی تطبیقی

روش‌های هوشمند در صنعت برق

مقاله 3، دوره 14، شماره 53، خرداد 1402، صفحه 33-60   

نوع مقاله: مقاله پژوهشی

نویسندگان

منیر کمالی¹؛ بهادر فانی^{* 1}؛ غضنفر شاهقلیان²؛ گئورک قره‌پتیان³؛ مسعود شفیعی³

¹دانشکده مهندسی برق- واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف‌آباد، ایران

²مرکز تحقیقات ریز شبکه های هوشمند- واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران

³دانشکده مهندسی برق- دانشگاه صنعتی امیرکبیر، تهران، ایران

چکیده

به دلیل وجود فاصله­های گوناگون و پیچیدگی ریزشبکه­ها، امپدانس خطوط بین فیدرهای تولیدهای پراکنده و بارها متفاوت است. از این‌رو روش‌های کنترل افتی مرسوم از کارایی مناسبی در توزیع توان بین واحدهای تولید پراکنده (DG) برخوردار نیستند. عموماً به دلیل ساده‌سازی، امپدانس خطوط به‌صورت مختلط مد نظر قرار نمی‌گیرد. شرایط بیان شده تا حد زیادی دقت و سرعت پاسخ دینامیکی سیستم کنترلی را کاهش می‌دهد. در این مقاله، جبران­سازی هارمونیک، ولتاژ و فرکانس ریزشبکه با روش کنترل امپدانس مجازی تطبیقی مبتنی بر توزیع متناسب توان ارائه شده است. در روش پیشنهادی کاهش ضریب خطای توان اکتیو و توان راکتیو، کنترل هارمونیک ولتاژ و جریان در دو حالت اتصال به شبکه اصلی و جزیره‌ای و همچنین کنترل ولتاژ و فرکانس به‌منظور بهره‌برداری بهینه از ریزشبکه ارائه شده است. روش پیشنهادی بدون نیاز به بروزرسانی اطلاعات امپدانس فیدرها، قابلیت بهره‌برداری و توزیع بهینه توان تحت شرایط مختلف بهره‌برداری با در نظر گرفتن امپدانس مختلط را نیز دارا است. به‌منظور صحت­سنجی، روش پیشنهادی در محیط نرم‌افزار متلب/سیمولینک سیستم شبیه‌سازی شده و نتایج حاصل از آن به همراه آنالیز پایداری و حساسیت ارائه شده است. 

کلیدواژه‌ها

توزیع تناسبی توان؛ روش امپدانس مجازی تطبیقی؛ ریزشبکه؛ کنترل ولتاژ و فرکانس

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