ADVANCED USE OF THE EXCEEDING POWER PLANT CAPACITY OF HVDC TRANSMISSION SYSTEMS TO PRODUCE OXYGEN AND HYDROGEN / UTILIZAÇÃO AVANÇADA DA CAPACIDADE EXCEDENTE DE SISTEMAS DE TRANSMISSÃO CCAT PARA PRODUÇÃO DE OXIGÊNIO E HIDROGÊNIO

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

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.

ASSUNTO(S)

production of 2 o and 2 h transmissão ccat electrolysis power quality eletrólise hvdc transmission qualidade de energia engenharia eletrica produção de 2 o e 2 h

ACESSO AO ARTIGO

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