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

Abstract

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