Banca de DEFESA: Gisela Sousa Ferreira

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Gisela Sousa Ferreira
DATE: 13/05/2024
TIME: 08:30
LOCAL: VIDEOCONFERÊNCIA
TITLE:

An Alternative Differential Protection Scheme for Electrical Microgrids

KEY WORDS:

Converter-based fonts; Dead zone; Differential Protection; Electrical Microgrids; Incremental Quantities; Renewable sources.

PAGES: 78
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUMMARY:

The integration of distributed generation (DG) microgrids into the electrical power system has brought about significant changes in the approach to electrical system protection, particularly concerning power flow dynamics. In light of these transformations, this study aimed to assess a protection mechanism based on differential current. In active microgrids, this differential function is collaborated by an incremental element to enhance security measures. To achieve this objective, a medium voltage (MV) microgrid was designed and simulated using EMTP software by protection zones. The relay scheme was thoroughly evaluated, and simulations were conducted to test its efficacy. Results demonstrated that the proposed algorithm reliably and safely responds to various types of short circuits occurring at different locations within the microgrid, with different values of impendance, in simultaneous time. Furthermore, its robust performance was confirmed under different operational conditions, including on-grid and off-grid modes, as well as ring and radial topologies. The proposed protection method offers a viable alternative for microgrid protection attributable to its simplicity, reduced requirement for current transformers (CT) compared to traditional differential protection schemes, and its overall reliability and safety.

COMMITTEE MEMBERS:
Presidente - 1402255 - FRANCIS ARODY MORENO VASQUEZ
Interno - 3145900 - FERNANDO CARDOSO MELO
Interno - 1640512 - KLEBER MELO E SILVA
Externo à Instituição - JOSE CARLOS DE MELO VIEIRA JUNIOR - USP