Equipment Hardening Strategies to Improve Electric Distribution System Resilience Against Wildfire

Talebi, Amir Hossein | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55201 (05)
  4. University: Sharif University of Technolog
  5. Department: Electrical Engineering
  6. Advisor(s): Vakilian, Mehdi
  7. Abstract:
  8. The severe wildfires in California, Australia, Canada, and Iran have interrupted the power system operation, caused multiple blackouts, took many lives, and caused damages to power grid infrastructure to the extent of millions and billions of dollars. Most of the recent wildfires occur in the distribution system. Therefore, enhancing power system distribution resilience against wildfire is crucial.To this end, two groups of measures are proposed: the hardening of the power network and the operational measures. The past published papers mainly studied the resilience enhancement strategies against wildfire from an operational perspective. There is a considerable gap between the past works published in the literature and the present planning perspective requirements of the utilities.Hence, this thesis focuses on economically analyzing hardening strategies and their impact on mitigating load shedding and wildfire risk in the distribution system. We proposed three methods of hardening strategies: 1. Undergrounding overhead distribution lines 2. Vegetation management & pole upgrading 3.Installing solar PV attached to energy storage systems. The problem is expressed in terms of a mixed-integer linear programming (MILP) optimization problem.First, a modified wildfire model is presented, and the impacts of approaching wildfire on conductors' temperature are simulated. Then, we modified the wildfire model to consider the damage to multiple lines simultaneously. Also, we evaluated the effects of different vegetation types on the progression of wildfire and, subsequently, the conductor's temperature variation. The modified IEEE 15-bus and 33-bus distribution test systems are used to demonstrate the proposed framework's effectiveness.
  9. Keywords:
  10. Energy Storage System ; Power System Resiliency ; Underground Cables ; Solar Power Plant ; Fire ; Vegetation ; Hardening Strategies

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