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Resiliency-Oriented Optimal Siting of distributed energy Resources in Distribution Systems Considering the Limitations of the Gas Distribution Network

Gilasi, Yasin | 2024

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 58140 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Hosseini, Hamid
  7. Abstract:
  8. Factors such as technological advancements and the development of Distributed Energy Resources (DER), changes in economic structures and privatization in the electricity industry, limitations in transmission line construction for power networks, the increasing necessity for sustainable energy by consumers, environmental regulations, and so forth, have made the topic of DER development planning at the distribution network level an intriguing subject aimed at improving quality parameters such as reducing losses in these types of networks. This has led to a discussion on the optimal placement and sizing of these resources at the distribution network level. In this context, the increasing penetration of Distributed Generation (DG) resources using natural gas alongside other DG technologies in distribution networks gradually creates a dependency of power networks on gas networks. Therefore, it becomes necessary to address this issue in developing power networks. Additionally, recent terrorist incidents and the increasing occurrence rates of natural disasters in recent years and their extensive impacts on power networks, especially in the distribution sector, have sparked the concept of resilience in studies related to power networks. Therefore, research based on the use of DER that can enhance resilience are of great importance. Thus, addressing resilience issues in power networks with a focus on DER and utilizing these resources in distribution networks to improve quality indices under normal conditions are interrelated topics. Therefore, providing a comprehensive model that includes these two issues is essential. Based on this premise, this thesis first presents a framework for optimal planning of solar panel development (location and capacity determination) in distribution networks. Its multi-objective approach minimizes installation and operating costs under normal network conditions and increases resilience against earthquake incidents based on existing solar panels in microgrids. Furthermore, to address energy generation gaps through solar panels in different weather conditions and during nights, electric batteries are introduced as a bridging element between normal and incident conditions. In addition to planning decision, a structure is proposed for battery operation and determining their critical energy minimum in each hour to ensure readiness to cope with unpredictable earthquake incidents, in addition to benefiting under normal conditions. Finally, the desired model is implemented on two power and gas networks to develop gas-fired DGs, solar panels, and electric batteries. It not only adheres to the technical constraints of power networks and economic limitations but also addresses gas network constraints during incidents and potential damages to the gas network. In all stages, a structure for creating incident scenarios has been provided to identify damaged elements in the network and assess their damage levels using the Monte Carlo method. In this structure, potential earthquake centers are identified based on equipment fragility curves and historical earthquake records in the target area to determine incident scenarios. Finally, the proposed model, using data from solar radiation and recorded earthquakes in Kerman city, is implemented on the IEEE 33-bus and IEEE 69-bus radial distribution systems. The results indicate that the dual approach in DER placement can prevent unnecessary development schemes and installation of resources in inappropriate locations, solely emphasizing the type and importance of load, as well as the proposed model enables network operators to achieve the most optimal scheme for installing and operating solar panels, electric batteries, and gas-fired DGs to reduce distribution network costs under normal conditions and increase the network load supply after earthquake events
  9. Keywords:
  10. Power System Resiliency ; Photovoltaic Panels ; Electrical Battery ; Distributed Energy Resorurces (DER) ; Earthquake ; Network Resiliance ; Dispersed Generation Optimal Placement

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