Variable speed pumped hydro based on modular multilevel converters: modeling, control and analysis of pumping-mode operation

Detalhes bibliográficos
Ano de defesa: 2020
Autor(a) principal: Silva, Matheus Soares da
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: eng
Instituição de defesa: Universidade Federal do Rio de Janeiro
Brasil
Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia
Programa de Pós-Graduação em Engenharia Elétrica
UFRJ
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/11422/23213
Resumo: This work deals with the behavior of a Modular Multilevel Converter (MMC) driving synchronous machines in variable-speed pumped hydro storage plants. This MMC-based topology has been proposed as one capable of implementing large-scale energy storage with fast dynamics and ancillary services while being possibly realized via retrofitting of existing fixed-speed pumped hydro storage units. The pumping mode of this application presents important differences in comparison to mature MMC applications, such as High-Voltage Direct Current links. For example, the low-speed operation of pumped hydro storage units during start-up and the control of an electrically excited salient pole machine. This dissertation presents a detailed PSCAD/EMTDC model and the results of time-domain simulations of this relatively new application. Some contributions are made to the start-up procedure technique based on common-mode voltage injection. Considerations on the main circuit design and a detailed description of the control system design are presented. Furthermore, the implementation of synthetic inertia into the pumping mode operation of this large-scale energy storage technology is studied.