بهبود طرح حفاظت ویژه حذف بار تحت افت ولتاژ بلند مدت به منظور کاهش خاموشی-تلفات در سیستم قدرت

نوع مقاله : مقاله برق

نویسندگان

1 پژوهشگر پسا دکترا، دانشکده برق و کامپیوتر-گروه قدرت، دانشگاه سمنان

2 استاد، دانشکده برق و کامپیوتر-گروه قدرت، دانشگاه سمنان

چکیده

امروزه استفاده از طرح حفاظت ویژه به عنوان راهکاری موثر و کارا در کاهش اثرات نامطلوب اغتشاش و اجتناب از وقوع خاموشی سراسری شبکه انتقال مطرح شده است؛ که دارای وظایف مختلفی است. یکی از وظایف طرح حفاظت ویژه تدوین راهکار کنترل اصلاحی شبکه به منظور جلوگیری از وقوع ناپایداری بلند مدت ولتاژ است. در این مقاله، مدل جدید در طرح حفاظت ویژه حذف بار تحت افت ولتاژ بلند مدت پیشنهاد شده است که مبتنی بر کاهش هزینه خاموشی و کاهش تلفات در سیستم‌های قدرت، مدل‌سازی بارهای وابسته به ولتاژ، مدل پاسخ‌گویی بار، و در نظر گرفتن فیدرهای تغذیه کننده بار است. ملاحظات در نظر گرفته شده در مدل‌سازی، نقش مهم در مشخصه فنی و اقتصادی طرح حفاظت ویژه حذف بار تحت افت ولتاژ دارند. به طوریکه در این مقاله، مدل‌سازی پاسخ‌گویی بار بر اساس تعیین هزینه مصرف انرژی الکتریکی در وضعیت اظطراری شبکه به نحوی خواهد بود که باعث جابجایی مصرف در جهت بهبود عملکرد شبکه شود. از آنجایی که فیدرهای تغذیه کننده بار و پاسخ‌گویی بار در این مقاله در نظر گرفته شده است، مسئله مذکور در قالب بهینه‌سازی گسسته-پیوسته تعریف می‌شود؛ تا مکان و مقدار حذف بار لازم و همچنین مقدار جابجایی بار بین شین‌های شبکه برای برقراری پایداری ولتاژ بلند مدت در شبکه انتقال با استفاده از الگوریتم دسته‌ذرات گسسته و پیوسته تعیین شود. مدل پیشنهادی در شبکه نمونه استاندارد 57 شین شبیه‌سازی شده است تا کارایی طرح حفاظت ویژه حذف بار پیشنهادی مشخص و اثبات شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Online Vulnerability Assessment in Cascading Failure Analysis Using an Intelligence Monitoring Model

نویسندگان [English]

  • Saber Armaghani 1
  • Zahra Moravej 2
1 Postdoctoral researcher, Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran
2 Professor, Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran.
چکیده [English]

Today, the Special Protection Scheme usage has been proposed as an effective and efficient strategy to reduce the impact of disturbance and avoid the occurrence of blackouts of the transmission network, which has different tasks. One of the tasks of the Special Protection Scheme is to develop a corrective control action to prevent the occurrence of long-term voltage instability. In this paper, a new model is proposed in the Special Protection Scheme for long-term under-voltage load shedding, which is based on minimizing the shedding cost and power losses in power systems, modeling voltage-dependent loads, load response model, and considering feeders. The economic and technical considerations in the proposed model play an essential role in the characteristics of the Special Protection Scheme for under voltage load shedding. Thus, in this paper, Demand Response modeling will be based on determining the cost of electric energy consumption in the emergency of the network in such a way as to cause a shift of consumption to improve the performance of the network. Since load feeders and load response are considered in this paper, the mentioned problem is defined in the form of discrete-continuous optimization to determine the location and amount of necessary load removal as well as the amount of load transfer between the load buses to establish long-term voltage stability in the transmission network using discrete and continuous particle swarm algorithm. The proposed model has been simulated in the standard IEEE 57-bus test system to determine and prove the effectiveness of the proposed Special Protection Scheme for load shedding.

کلیدواژه‌ها [English]

  • Special protection scheme
  • Under voltage load shedding
  • Shedding cost and loss minimization
  • Price based demand response model
  • Mixed integer optimization problem
  • Discrete- continuous PSO algorithm

مراجع

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مدل سازی در مهندسی
دوره 22، شماره 77
شهریور 1403
صفحه 273-290

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سابقه مقاله

  • تاریخ دریافت: 21 شهریور 1402
  • تاریخ بازنگری: 04 دی 1402
  • تاریخ پذیرش: 25 دی 1402

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