بهینه‌سازی تابع چندهدفه برای مشخصه‌های ریکلوزر دیجیتال و سایز محدودساز جریان خطا در شبکه توزیع دارای تولیدات پراکنده

نوع مقاله : مقاله پژوهشی فارسی

نویسندگان

دانشکده مهندسی برق ـ دانشگاه آزاد اسلامی ساوه ـ ساوه ـ ایران

چکیده

تولیدات پراکنده در کنار مزایای فراوانشان برای شبکه‌های توزیع، باعث تغییر جهت و افزایش سطح جریان خطا در شبکه توزیع می‌شوند. این تغییرات باعث از بین رفتن هماهنگی حفاظتی ریکلوزرها و فیوزها در شبکه‌های توزیع می‌شود. معمولاً زمان عملکرد ریکلوزرها با دو تنظیم اصلی TDS و IP تعیین می‌شوند؛ اما دو مشخصه دیگر A و B که در ریکلوزرهای سنتی به‌صورت استاندارد تعریف می‌شوند، زمان عملکرد ریکلوزرها را تغییر می‌دهد که در ریکلوزرهای دیجیتال تغییر‌پذیرند. در این مقاله، این دو مشخصه به همراه TDS و IP برای ایجاد هماهنگی حفاظتی، بهینه‌سازی می‌شوند. برای این منظور، ابتدا مکان و سایز DGها و سپس برای کاهش تأثیرات DGها، محل و امپدانس FCLها با هدف کاهش تلفات، بهبود پروفیل ولتاژ و کاهش تغییرات جریان‌های خطای فیدرها در زمان اتصال DGها با تابع هدف چندعامله بهینه‌سازی می‌شود. سپس با هدف بازیابی هماهنگی حفاظتی و کاهش زمان عمکرد تجهیزات حفاظتی فیوز و ریکلوزر، با استفاده از یک تابع چندعامله، مشخصه‌های A، B، TDS، IP بهینه‌سازی می‌شود. طرح پیشنهادی برای اعتبارسنجی بر شبکه 33 باسه IEEE در حضور DGهای سنکرون و SFCL مقاومتی در نرم‌افزار دیگسایلنت شبیه‌سازی شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Optimization of Multi-Objective Function for User-defined Characteristics Recloser and Size of Fault Current Limiters in Radial Networks with Distributed Generation

نویسندگان [English]

  • Saman Ghobadpour
  • Majid Gandomkar
  • Javad Nikoukar
Department of Electrical Engineering, Islamic Azad University, Saveh branch, Saveh, Iran
چکیده [English]

In addition to the many advantages of Distributed Generation (DG) for the distribution networks, they change the direction and increase the level of fault current. These changes may cause the loss of protection coordination of reclosers and fuses in distribution networks. Usually, the operation time of reclosers is determined by two main settings, TDS and IP, but two other parameters (A and B), which are defined by the standards of traditional reclosers, are also influential on the operation time of reclosers. These two parameters can be modified in digital reclosers. In this article, these two characteristics are optimized with TDS and IP to restore protection coordination. For this purpose, first, the location and the size of the DGs are specified, after that to alleviate the effects of the DGs, the location and the impedance of FCLs are optimized by a multi-objective optimization function to reduce the loss, improve voltage profile, and reduce the effects of changes in the feeders’ fault current while DGs are connected to the distribution network. Then, to restore the protection coordination, and to reduce the operating time of the protection equipment, fuse, and recloser, the parameters A, B, TDS, and IP are optimized using a multi-function optimization. To validate the proposed approach, the IEEE 33-bus network in the presence of synchronous DGs and resistive SFCL has been simulated in DIgSILENT software.

کلیدواژه‌ها [English]

  • Voltage profile
  • Protection coordination
  • Loss reduction
  • Digital reclosers
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