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The Alternating Evolution of DC Power Transmission [Historical]

机译:直流输电的交替发展[历史]

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After more than one century of evolution of alternating current (ac) and thanks to the competitive costs of alternators and transformers, today a great majority of electricity is produced, transmitted, and distributed worldwide by means of ac polyphase systems [1], [2]. Nevertheless, about 200 high-voltage direct current (HVDC) systems are spread over the world to provide services where they are more convenient than ac systems. Moreover, the number of direct current (dc) systems is increasing, primarily due to the expansion of intermitted renewable energy sources and the inherent need to provide them with storage capabilities and, secondly, because of the enhanced competitiveness of solid-state converters. These two aspects can merge to form visionary concepts such as the energy hub, which fosters medium-voltage ?direct current transmission.
机译:经过一个多世纪的交流(ac)演变,由于交流发电机和变压器具有竞争力的成本,如今,全世界大部分的电力都是通过ac多相系统生产,传输和分配的[1],[2] ]。尽管如此,在世界范围内仍分布着约200个高压直流(HVDC)系统,以提供比交流系统更方便的服务。此外,直流(dc)系统的数量正在增加,这主要是由于间歇性可再生能源的扩展以及为其提供存储功能的内在需求,其次是由于固态转换器的竞争力增强。这两个方面可以合并形成有远见的概念,例如能源枢纽,它促进了中压直流电的传输。

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