سامانه ‏های غیرخطی در مهندسی برق

سامانه ‏های غیرخطی در مهندسی برق

کنترل اینرسی مجازی ریزشبکه دو ناحیه‌ای با استفاده از نامساوی ماتریس خطی

نوع مقاله : مقاله پژوهشی

نویسندگان
دانشگاه بوعلی سینا
چکیده
در ریزشبکه جزیره‌ای به علت اینکه از مبدلهای الکترونیک-قدرت برای مبادله توان استفاده می‌شود و این مبدل‌ها، اینرسی بسیار پایینی دارند، در نتیجه پایداری فرکانسی ریزشبکه را به خطر می‌اندازد. کنترل اینرسی مجازی به منظور بهبود پایداری فرکانسی در ریزشبکه جزیره‌ای به کار برده شده است. معمولا از تکنیک کنترل مشتق برای پیاده‌سازی کنترل اینرسی مجازی در ریزشبکه استفاده شده است. عواملی مانند اغتشاش و عدم قطعیت پارامترهای ریزشبکه جزیرهای، عملکرد کنترل اینرسی مجازی را به خطر می‌اندازد و ممکن است سبب ناپایداری فرکانسی سیستم شود. بنابراین ساختار کنترل اینرسی مجازی نیازمند یک کنترل کننده تکمیلی است که بتواند اثر اغتشاش وارد بر ریزشبکه را تا حد امکان تضعیف کند و در برابر عدم قطعیت پارامترهای ریزشبکه مقاوم باشد. در این مقاله، یک روش کنترلی مقاوم در ساختار کنترل اینرسی مجازی به کاربرده شده است که از فیدبک خروجی سیستم استفاده می‌کند. روش پیشنهادی بر مبنای نامساوی ماتریس خطی بیان شده و بر پایه معیار لیاپانوف اثبات شده است. از جمله مزایای روش پیشنهادی می‌توان به تضعیف اغتشاش، مقاوم در برابر عدم قطعیت پارامترهای ریزشبکه و افزایش درجات آزادی برای کنترل سیستم در این روش اشاره کرد. نتایج روش پیشنهادی برای بهبود عملکرد کنترل اینرسی مجازی، در چند سناریو مختلف با در نظر گرفتن عدم قطعیت پارامترهای ریزشبکه دو ناحیه‌ای و نیز اغتشاشهای وارد بر ریزشبکه با چندین روش مقایسه شده است و موثر بودن روش پیشنهادی از لحاظ بهبود پایداری فرکانسی نشان داده شده است.
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  • تاریخ دریافت 22 تیر 1404
  • تاریخ اولین انتشار 22 تیر 1404
  • تاریخ انتشار 01 مهر 1401