Programa de Pós-Graduação em Engenharia Elétrica e de Computação
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Doctoral Thesis Estratégia Grid-Forming para geração eólica em microrredes utilizando regulador eletromagnético de frequência(Universidade Federal do Rio Grande do Norte, 2025-06-30) Dantas Neto, José Raimundo; Salazar, Andrés Ortiz; https://orcid.org/0000-0001-5650-3668; http://lattes.cnpq.br/7865065553087432; http://lattes.cnpq.br/0632687844877314; Maitelli, André Laurindo; https://orcid.org/0000-0001-6083-7425; http://lattes.cnpq.br/0477027244297797; Fonseca, Diego Antonio de Moura; Larrea, José Andres Santisteban; Pinheiro, Ricardo Ferreira; Araújo, Valbério Gonzaga deThe increasing use of renewable energy sources (RES), especially solar and wind, has driven significant transformations in the Electric Power System (EPS), which is now organized in a more distributed manner through microgrids. This new paradigm requires control solutions that ensure stability, power quality, and robustness in operation. Traditionally, distributed generation (DG) uses grid-following control strategies, which the RES connects to the grid following its frequency and voltage. However, this approach contributes to the EPS instability in scenarios with high RES penetration. In contrast, grid-forming strategies have stood out for allowing the DG itself to define the voltage and frequency parameters, promoting greater stability, dynamic support, and resilience. Despite the advances, the use of power converters in the interface with the grid presents considerable challenges, such as low inertia and dynamic response limitations. Many control approaches aim to emulate the behavior of a synchronous generator (SG) to mitigate these problems. In this context, the use of an Electromagnetic Frequency Regulator (EFR) emerges as a promising solution for wind power systems (WPS), as it enables the use of an SG in the connection to the microgrid. This configuration eliminates the interface converter, promoting a robust electromechanical coupling, capable of providing inertia to the system, contributing to its stability and power quality. Thus, this thesis proposes an interconnection strategy for a WPS using an EFR/SG set operating in grid-forming mode. The strategy provides support to the main grid when connected, through the power flow regulation using the droop control technique. In addition, it ensures frequency and voltage inertial response, especially during islanding conditions. The start-up and synchronization process is also addressed, aligning the DG and grid voltage vectors. The validation of the proposed strategy is carried out through simulations in the Matlab/Simulink platform and experimental tests conducted at the Petroleum Assessment and Measurement Laboratory (LAMP), demonstrating the effectiveness and robustness of the presented solution.Master Thesis Estratégia de controle aplicado a Sistemas de Geração Distribuída segundo o conceito de Gerador Síncrono Virtual(Universidade Federal do Rio Grande do Norte, 2020-12-17) Dantas Neto, José Raimundo; Ribeiro, Ricardo Lucio de Araújo; Costa, Flavio Bezerra; ; http://lattes.cnpq.br/7510091283933216; ; http://lattes.cnpq.br/6628177274865696; ; http://lattes.cnpq.br/0632687844877314; Oliveira, Alexandre Cunha; ; http://lattes.cnpq.br/6699829609793478; Martins, Allan de Medeiros; ; http://lattes.cnpq.br/4402694969508077; Martins, Mário Lúcio da Silva; ; http://lattes.cnpq.br/2730012969211616; Rocha, Thiago de Oliveira Alves; ; http://lattes.cnpq.br/0526030044370008