Short-Circuit Analytical Model for Modular Multilevel Converters Considering DC Cable Capacitance

Autor(es)

Lacerda, Vinicius Albernaz ^[1] ; Pena-Alzola, Rafael ^[2] ; Campos-Gaona, David ^[2] ; Monaro, Renato Machado ^[3] ; Anaya-Lara, Olimpo ^[2] ; Coury, Denis Vinicius ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Elect & Comp Engn, BR-13566590 Sao Carlos - Brazil

^[2] Univ Strathclyde, Dept Elect & Elect Engn, Glasgow G1 1XQ, Lanark - Scotland

^[3] Univ Sao Paulo, Polytech Sch, Dept Elect Energy & Automat Engn, BR-05508220 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: IEEE ACCESS; v. 8, p. 202774-202784, 2020.
• Citações Web of Science: 0

Resumo

Developing analytical short-circuit models for Modular Multilevel Converters (MMC) is not straightforward due to their switching and blocking characteristics. Short-circuit models for MMCs have been developed previously in the literature. However, there is a lack of understanding regarding the dynamics in the short-circuit model when the DC cable capacitance is taken into account. Therefore, this work proposes an analytical pole-to-pole short-circuit model for half-bridge MMCs that considers the cable capacitance and terminal capacitors and accounts their contribution to fault dynamics. An approximated analytical model has been derived separating the system solutions in different natural frequencies. The proposed model provides an excellent approximation for a vast range of realistic system parameters. The analytical model reproduced the behaviour of the variables in the time domain and provided a clear basis for interpreting the dynamics of the voltages and currents involved. (AU)

• Processo FAPESP: 15/21167-6 - Detecção, localização de faltas e proteção inteligente de linhas HVDC com múltiplos terminais
• Beneficiário: Vinícius Albernaz Lacerda Freitas
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 18/10667-6 - Proteção inteligente de sistemas VSC-HVDC multiterminais: aspectos da simulação e implementação
• Beneficiário: Vinícius Albernaz Lacerda Freitas
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto