Utilização avançada da capacidade excedente de sistemas de transmissão CCAT para produção de oxigênio e hidrogênio

• Ano de defesa: 2008
• Autor(a) principal: Parizzi, Jocemar Biasi
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; BR; Engenharia Elétrica; UFSM; Programa de Pós-Graduação em Engenharia Elétrica
• Palavras-chave em Português: Transmissão CCAT; Eletrólise; Qualidade de energia; Produção de 2 O e 2 H; HVDC transmission; Electrolysis; Power quality; Production of 2 O and 2 H; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/3654

This PhD thesis discusses the use of the power plant capacity in HVDC transmission systems during inactive periods of the main converters to feed local loads, aiming at a better AC power quality and DC transmission. The power available in the inactive periods is drained by an auxiliary converter connected in parallel with the HVDC converter. This energy can be used to: feed thermal equipments; battery charging; supply of local services; AC power re-injection; and to produce high purity hydrogen and oxygen through electrolysis. The overall control was designed to improve the power transmission quality at the AC side of the HVDC plant. Simulated and lab practical results from a reduced model of a HVDC plant and from the auxiliary converter connected in parallel with the main converter are presented. The proposed arrangement of converters demonstrates the possibility of THD reduction and increase of the power and utilization factors, without disturbing the efficiency of the HVDC transmission system, and making evident loss reduction, sizing of the harmonic filters and PF reactors. For their special characteristics, at the end of this thesis it is presented the state of art of the auxiliary converter energy utilization to produce hydrogen and oxygen through water electrolysis.