بهبود پاسخ دینامیکی ژنراتور القائی دوسو تغذیه در برابر ولتاژ پایین شبکه به کمک سیستم کنترلی مبتنی بر حالت لغزش انتگرالی با مرجع توان راکتیو متغییر

روش‌های هوشمند در صنعت برق

مقاله 2، دوره 14، شماره 55، آذر 1402، صفحه 13-26   

نوع مقاله: مقاله پژوهشی

نویسندگان

حمید مقدسی¹؛ محمدرضا مرادیان^{* 2}

¹دانشکده مهندسی برق- واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران

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

چکیده

در این مقاله به­منظور بهبود پاسخ دینامیکی ژنراتور القایی دوسوتغذیه (DFIG)، یک سیستم کنترلی جدید مبتنی بر کنترل‏کننده سطح لغزش پیشنهاد شده است. به­این منظور کنترل مستقل توان‏های اکتیو و راکتیو خروجی ژنراتور از طریق یک کنترل‏کننده مد لغزشی (SMC) که در برابر اغتشاشات خارجی و نامعینی‏های سیستم مقاوم است، کنترل می­گردد. برای بهبود عملکرد کنترل در حالت ماندگار، مدل انتگرالی کنترل‏کننده مد لغزشی (ISMC) و برای بهبود قابلیت عبور از ولتاژ پائین (LVRT) ژنراتور در شرایط وقوع خطا، کنترل‏کننده توان راکتیو با مرجع متغیر مبتنی بر کنترل‏کننده‏ متناسب-انتگرال­گیر (PI) پیشنهاد شده است. عملکرد کنترل‏کننده پیشنهادی در مدت زمان ردیابی توان مرجع، با دو سیستم کنترلی دیگر که مرجع ثابتی برای توان راکتیو داشته و مبتنی بر کنترل­کننده­های SMC و PI هستند در ۹ حالت مختلف خطا مقایسه شده است. خطاهای تک فاز به زمین، دو فاز به زمین و سه فاز به زمین در حالت­های زیر سنکرون، سنکرون و فوق سنکرون حالت­های مختلف مورد نظر در مقایسه سیستم­های کنترلی هستند. نتایج شبیه‌سازی با استفاده از نرم­افزار سیمولینک متلب، نشان­دهنده رفتار حالت گذرای مناسب­تر و به ویژه فراجهش­های کمتر جریان، ولتاژ لینک DC و توان اکتیو خروجی در سیستم کنترل پیشنهادی در مقایسه با دو سیستم دیگر در شرایط وقوع انواع خطا بوده است.

کلیدواژه‌ها

ژنراتور‌های القایی دوسو تغذیه؛ قابلیت عبور از ولتاژ پایین؛ کنترل مستقل توان؛ کنترل‌کننده مد لغزشی

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