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ارائه راهکارهای پیشگیرانه جهت افزایش استقامت برای بهبود تاب آوری شبکه ی توزیع انرژی الکتریکی در برابر زلزله
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ارائه راهکارهای پیشگیرانه جهت افزایش استقامت برای بهبود تاب آوری شبکه ی توزیع انرژی الکتریکی در برابر زلزله

احمدی، مهدی Ahmadi, Mehdi

Hardening Strategies for Enhancing the Resilience of Electrical Distribution Networks against Earthquake

Ahmadi, Mehdi | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53855 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Vakilian, Mehdi
  7. Abstract:
  8. During natural disasters, especially an earthquake the distribution systems operation is severely affected and interrupted by facing many failures. More than 80% of these outages are due to failures in distribution Systems. Therefore, it is crucial to enhance the resilience of the distribution systems (DSs) against these disasters. However, nowadays, due to limitation of resources for investment in these networks, only the most efficient measures should be implemented. In this work, studying the recent earthquakes in different countries, we have tried to identify the fundamental causes of failure of important network equipment, including distribution substations equipment and network lines. And, then for each equipment, some solutions are investigated to improve their resistance. We have also examined the use of different types of underground cables instead of overhead lines and the required characteristics to decrease their failure rate, and to improve their resilience performance, under different situations. In this paper, in order to investigate the vulnerability of the distribution network equipment, the equipment failure curve as well as the possible earthquake model have been used. Also, a new tri-level optimization model based on the min-max-min model is presented to improve the distribution system resilience. Using this method, by reviewing the past earthquakes´ consequences in Iran and other parts of the world; three strategies are developed and employed: 1- hardening distribution poles 2- hardening the connection of distribution transformers on their supporting poles 3- allocating distributed generator (DG) units in candidate nodes. In this model, the system planner determines which lines and nodes need to be hardened in the upper level. In the middle level, the most vulnerable lines and nodes under occurrence of natural disasters are identified. In the lower-level, the system operator decides how to reconfigure the grid by a set of switching operations to minimize the load-shedding. The proposed method is implemented into a real 48-bus distribution network in Tehran. The results verify the effectiveness of the proposed method
  9. Keywords:
  10. Natural Disasters ; Earthquake ; Power System Resiliency ; Seismic Resilience ; Distribution Networks Planning ; Distribution Poles Reinforcement ; Underground Cables ; Three Level Optimization ; Resilience Enhancement

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