State of the Art of Researches and Applications of MVDC Distribution Systems in Power Grid

Considered as an important option to enhance power distribution capacity, improve operation flexibility and increase power quality in distribution grids, the medium-voltage DC (MVDC) technology has gained increasing interests in recent years. In this paper, the state of the art of researches and applications of MVDC distribution system is presented. Main topics and progresses are explored including planning and evaluation, main circuits, key equipment, control and protection. The most recent pilot projects around the world are introduced among which the Tangjia Bay pilot project with the largest capacity is illustrated in detail, together with the practical issues during the design, experiment, and commissioning.

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