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Methodology for detection and location of high impedance faults in power distribution systems with distributed generation

Grant number: 20/06935-5
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2021
Effective date (End): September 30, 2024
Field of knowledge:Engineering - Electrical Engineering - Power Systems
Principal researcher:José Carlos de Melo Vieira Júnior
Grantee:Gabriela Nunes Lopes
Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil


The protection of Distribution Systems (DSs) against High Impedance Faults (HIFs) is an arduous task that attracts the interest of companies and researchers worldwide. The random behavior, the possibility of ambiguity concerning other DS events, and the small magnitude of the HIF current waveforms prevent the quick and effective protection of traditional methods. With the increasing insertion of Distributed Generation (DG) in DSs, a greater level of difficulty is added to the accomplishment of this type of protection. It should also be noted that the possible damage to the equipment of the medium voltage network, as well as risks to people and animals, are associated with the occurrence of HIFs and induce the search for new techniques and protection devices. However, there is no fully efficient solution for protection against this type of fault. Therefore, this project proposes the development of a protection algorithm against HIFs, which contains the detection and location of the fault. This study will also include the analysis of the system behavior with different levels of DG penetration. Additionally, the robustness of all steps of the algorithm about other common events and to topological and loading changes in DSs will be analyzed. Finally, as a result, it is intended to obtain a complete algorithm for protection against HIFs. (AU)

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