一种具有直流故障阻断能力和降低开关容量的新型中压混合级联DC-DC变换器

In this article, a medium-voltage nonisolated dc–dc converter with dc fault-blocking capability is proposed. The converter is designed to connect two high-voltage dc networks with varying voltage levels. The proposed converter is composed of a string of cascaded modules and two sets of series-connected switches. The cascaded modules have all the merits of modular design, and the series-connected s...