US 12,278,480 B2
Power high-density DC/DC conversion system with overvoltage protection for energy transmission by umbilical cables connected to robotic systems in long pipelines
Hugo Francisco Lisboa Santos, Rio de Janeiro (BR); Leonardo Sostmeyer Mai, Florianópolis (BR); Renato Ferreira Simão, Florianópolis (BR); Willian Henrique, Florianópolis (BR); Anselmo Luís Da Silva, Jr., Florianópolis (BR); Ney Robinson Salvi Dos Reis, Rio de Janeiro (BR); and Fabrizio Piccoli Maziero, Florianópolis (BR)
Assigned to PETRÓLEO BRASILEIRO S.A.—PETROBRAS, Rio de Janeiro (BR); and SERVIÇO NACIONAL DE APRENDIZAGEM INDUSTRIAL DEPARTAMENTO REGIONAL DE SANTA CATARINA—SENAI/SC, Florianopolis (BR)
Filed by PETRÓLEO BRASILEIRO S.A.—PETROBRAS, Rio de Janeiro (BR); and SERVIÇO NACIONAL DE APRENDIZAGEM INDUSTRIAL DEPARTAMENTO REGIONAL DE SANTA CATARINA—SENAI/SC, Florianópolis (BR)
Filed on Aug. 24, 2022, as Appl. No. 17/894,383.
Claims priority of application No. 1020210168250 (BR), filed on Aug. 25, 2021.
Prior Publication US 2023/0076656 A1, Mar. 9, 2023
Int. Cl. H02H 7/12 (2006.01); G05F 3/18 (2006.01); H02M 1/00 (2007.01); H02M 3/158 (2006.01); H02H 7/00 (2006.01); H02H 9/04 (2006.01)
CPC H02H 7/1213 (2013.01) [H02M 1/007 (2021.05); H02M 3/1584 (2013.01); G05F 3/18 (2013.01); H02H 7/005 (2013.01); H02H 9/045 (2013.01); H02M 1/008 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A power high-density DC/DC conversion system with overvoltage protection, comprising:
a surface source;
an umbilical cable;
an overvoltage protection circuit; and
a two-stage conversion modular system comprising an unregulated first conversion module and a regulated second conversion module, wherein the first conversion module is configured to lower input voltage from between 630 V and 700 V to a lower unregulated bus voltage between 36 V and 42 V, and the second conversion module is configured to convert the lower unregulated bus voltage to a regulated bus output voltage,
wherein the second conversion module comprises a combination voltage booster and reducer module that is connected to the lower unregulated bus voltage and that is configured to convert the lower unregulated bus voltage to the regulated bus output voltage.