A kind of DC fault current-limiter with instantaneous by-pass of current-limiting reactor

With the rapid development of DC power grids, protection grids is particularly important. Therefore, this paper proposes a kind fault current-limiter with instantaneous by-pass current-limiting reactance, analyses its working principle and theoretical calculations, verifies correctness through simulation experiments. At same time, experimental results show that proposed in can not only instantaneously greatly limit current when short-circuit occurs grid, but affect normal operation grid. A new device provided for gird protection.