The Study of Control Tactics of Relaying Protection of the Certain Steelworks in Black Start

摘要

In this paper, the study of control tactics of relaying protection of certain steelworks is presented. According to the main issues that need to be considered in restoration process, such as the influence of set-up transformer and exciting rush current, the re-closing way of bus, current protection of line, and generator protection, the control tactics of relaying protection has been adjusted to match the restoration condition.