The decision of operating mode in setting of zero sequence current relay of line aided by computer

How to decide power system′s operating mode reasonably and quickly is the very important step in the setting of relay. The traditional ways always consider seldom operating mode so that they make the settings much unreasonable. This paper introduces an eddicient criterion to lessen the numbers of components which to join operating to get operating modes more quickly and accurately. And this paper describes the general steps of deciding operating modes based on the given method in setting of zero sequence current relay aided by computer.