Variable speed pumped hydro based on modular multilevel converters: modeling, control and analysis of pumping-mode operation
Ano de defesa: | 2020 |
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Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
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
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Departamento: |
Não Informado pela instituição
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País: |
Não Informado pela instituição
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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. |