بخش‌بندی جزیره سیستم‌های توزیع هوشمند تحت شرایط اضطراری با لحاظ پایداری ولتاژ و فرکانس

نوع مقاله : مقاله برق

نویسندگان

دانشکده مهندسی برق و کامپیوتر، دانشگاه سمنان، سمنان، ایران

چکیده

بخش‌بندی جزیره یک راه‌حل مناسب برای بازیابی توان در سیستم توزیع هوشمندی که به‌صورت ناخواسته جزیره‌ای می­شود می‌باشد. بلافاصله بعد از قطع شبکه اصلی به علت خطا، زیرسیستم جزیره‌ای دچار انحرافات شدید ولتاژ و فرکانس خواهد شد. ارائه روش‌هایی برای بخش‌بندی جزیره بدون توجه به مشخصه‌های ولتاژی و فرکانسی نمی‌تواند به راه‌حل‌های قابل اطمینانی منتهی شود. ازاین‌رو، در این مقاله یک راه‌حل دومرحله‌ای و چندهدفه برای بازیابی توان سیستم توزیع هوشمند جزیره‌ای در شرایط اضطراری با لحاظ پایداری فرکانسی و ولتاژی ارائه‌شده است. در مرحله اول، باتوجه‌به زمان در دسترس برای تصمیم‌گیری در مورد اقدامات کنترلی، طرح بخش‌بندی پیشنهادی باهدف بیشترین ارزش بار بازیابی‌شده و بیشترین حاشیه پایداری ولتاژ با الگوریتم گورکن عسل‌خوار ارائه می‌شود. در طرح پیشنهادی، شاخص پایداری ولتاژ، اولویت و کنترل‌پذیری بار در حذف بار، و پاسخ فرکانسی و حاشیه پایداری ولتاژ در یافتن مرزهای ‌بخش‌ها لحاظ شده است. در مرحله دوم، پخش بار بهینه برای تنظیم بخش‌‌ها و برقراری قیود عملیاتی سیستم انجام می‌شود. راه‌حل پیشنهادی نه‌تنها منجر به ایجاد بخش‌هایی با ولتاژ باس مجاز و فرکانس مجاز می‌شود؛ بلکه نسبت به سایر روش‌ها، کمترین تلفات، بیشترین مقدار بار بازیابی شده و بارهایی با بیشترین ارزش تأمین می‌شوند. به‌علاوه، باتوجه‌به چندهدفه بودن و درنظرگرفتن پایداری ولتاژی و فرکانسی، پوشش جزایر با عدم تعادل توان مثبت و منفی، وقوع خطاهای هم‌زمان، وجود منابع کنترل‌پذیر و کنترل‌ناپذیر، رزرو توان، کنترل‌پذیری بارها و تولیدات پراکنده، موقعیت کلید‌ها، حداکثر زمان دردسترس برای تصمیم‌گیری در مورد اقدامات کنترلی و تأخیر زمانی بین اقدامات کنترلی، از سایر روش‌ها جامع‌تر می‌باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Island Partitioning of Smart Distribution Systems in Emergencies Considering Voltage and Frequency Stability

نویسندگان [English]

  • Zahra Hosseini Najafabadi
  • Asghar Akbari Foroud
Electrical and Computer Engineering Faculty, Semnan University, Semnan, Iran
چکیده [English]

Island partitioning is an attractive solution to restore service in a smart distribution system that becomes islanded unintentionally. Immediately after the disconnection of the main grid due to a fault, the island subsystem experiences intense voltage and frequency deviations. Providing methods for island partitioning without considering frequency and voltage characteristics cannot lead to reliable solutions. So, in this paper, a two-stage and multi-objective solution is presented to restore the services of the island system in emergencies, considering the frequency and voltage stability. In the first stage, according to the available time to decide on the control measures, the partitioning scheme with the aim of the highest restored load and voltage stability margin is presented with the honey badger algorithm. In the algorihm, voltage stability index, load priority and controllability, frequency response and voltage stability margin are included in load shedding and in finding the borders of the partitions, respectively. In the second stage, optimal power flow is done to set the partitions and satisfy the system operational constraints. Not only does the proposed method create partitions with the allowable bus voltage and frequency, but it also privides the lowest losses, the largest restored load, and the highest restored load compared to other methods. Moreover, the proposed method is more comprehensive due to multi-objective and considering voltage stability, frequency stability, simultaneous faults, controllable and uncontrollable distributed generations, reserve, position of switches, available time to decision making, time delay between control measures, and handling islands with positive and negative power imbalance.

کلیدواژه‌ها [English]

  • Frequency stability
  • Island partitioning
  • Intentional islanding
  • Smart distribution system
  • Voltage stability index

مراجع

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مدل سازی در مهندسی
دوره 22، شماره 79
در حال تکمیل شدن
دی 1403
صفحه 153-173

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سابقه مقاله

  • تاریخ دریافت: 01 دی 1402
  • تاریخ بازنگری: 16 اسفند 1402
  • تاریخ پذیرش: 01 اردیبهشت 1403

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