After the proposal of"dual carbon"target,the energy and the power industry has undergone profound reform in China,especially promoting the rapid development of new power.At present,the power adjustment times of the existing line commutated converterbased high voltage direct currentl(LCC-HVDC)projects in one day are limited,and the matching between the LCC-HVDC power transmission curve and the new power generation curve is poor,therefore large-scale stabilized power supplies such as coal-fired power plants and hydropower plants are needed to satisfy the transmission demand of electric power and quantity,which will restrict the increase of the renewable energy transmission proportion.Basedon the technical features of voltage source converterbased high voltage direct current(VSC-HVDC),the flexible application schemes for sending-end system in LCC-HVDC are proposed,including the flexible operation scheme,the flexible retrofitting scheme,and the hybrid HVDC scheme,in order to improve the adaptability of LCC-HVDC project and make full use of cross-district transmission capacity,which will provide reference for the further development direction of the existing LCC-HVDC projects.
关键词
新能源/常规直流输电/柔性化运行/柔性化改造/混合直流输电
Key words
renewable energy/line commutated converterbased high voltage direct current/flexible operation/flexible retrofitting/hybrid high voltage direct current
维普
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