مسأله در مدار قرارگرفتن واحدهای نیروگاهی با هدف افزایش تاب‌آوری شبکه

نویسندگان

دانشکده برق و مهندسی پزشکی - دانشگاه صنعتی سجاد

چکیده

تاب‌آوری سیستم به‌عنوان مفهوم جدیدی در صنعت برق از اهمیت ویژه‌ای برخوردار شده است. این مقاله، با در نظرگرفتن نرخ تغییر فرکانس به‌عنوان شاخصی جدید برای تاب‌آوری سیستم، در مقابل حوادث نادر و شدید که منجر به خروج واحدها و ناپایداری‌های فرکانسی می‌شود، به معرفی مدل تاب‌آور ورود و خروج واحدهای حرارتی می‌پردازد. این مدل با استفاده از مسأله کلیدزنی بهینه واحدهای تولید پراکنده، قراردادهای قطع بار اضطراری و استفاده از حذف بار فرکانسی تطبیقی خودکار روشی مؤثر برای حل مسأله در مدار قرارگرفتن واحدهای نیروگاهی به‌منظور جلوگیری از ناپایداری فرکانسی شبکه ارائه می‌نماید و در هنگام وقوع حادثه نقطه کار سیستم را در حالتی پایدار نزدیک به نقطه بهینه قرار می‌دهد. تمام مراحل شبیه‌سازی در نرم‌افزار MATLAB بر روی شبکه استاندارد 57 باسه IEEE‌ انجام شده است. نتایج شبیه‌سازی روش پیشنهادی زمانی که با مسأله مرسوم برنامه‌ریزی ورود و خروج واحدهای نیروگاهی با صرف‌نظر از کلیدزنی بهینه واحدهای تولید پراکنده مقایسه می‌شود، اثربخشی این رویکرد نوآورانه را در افزایش ثبات فرکانس سیستم قدرت نشان می‌دهد.

کلیدواژه‌ها

عنوان مقاله [English]

Unit Commitment Problem with the Aim of Increasing System Resilience

نویسندگان [English]

  • M. Monemi
  • S. Hassanpour Darban
Faculty of Electrical and Biomedical Engineering, Sadjad University of Technology, Mashhad, Iran
چکیده [English]

System resilience as a new concept in the power industry becomes important recently. This paper with consider to the rate of change of frequncey as a new system resilience index, introduces a resilient constraint unit commitment model to increase resilience against rare and severe events that ultimately lead to outages and frequency instabilities. This model offers an effective approach to solve unit commitment problem to prevent frequency instability by using optimal distributed generation switching problem, emergency interruptible load contracts and adaptive automatic frequency load shedding and when the event occurs, it places the system’s operating point in a stable state close to its optimal point. All simulation steps in the MATLAB software were conducted on 57-bus IEEE standard system. Simulation results of the proposed method, when compared with the conventional unit commitment approach without optimal distributed generation switching, imply the effectiveness of this innovative approach in the power system frequency stability enhancement.

کلیدواژه‌ها [English]

  • Electric grid resilience
  • unit commitment
  • distributed generation optimal switching
  • emergency interruptible loads contracts
  • adaptive automatic frequency load shedding

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