Method utilizing reactors connected in series for achieving all-line current quick break protection of distributing lines

The invention discloses a method utilizing reactors connected in series for achieving all-line current quick break protection of distributing lines. A reactor with a proper resistance value is connected to the tail end of the section of the distribution line of the stage in series, and short-circuit current amplitude values of the tail end of the section of the distribution line of the stage and the head end of the section of the distribution line of the next stage are distinguished obviously so that current quick break protection of the section of the distribution line of the stage can be achieved within the full-length range; under the maximum operating mode, extension to the head end of the section of the distribution line of the next stage is avoided. According to the method, a current quick break protection fixed value is set according to sensitivity existing in two-phase short circuits at the tail end under the minimum operating mode, and when three-phase short circuits occur to the reactor connected to the tail end of the section of the distribution line in series under the maximum operating mode, the current quick break protection of the stage does not extend to the head end of the section of the distribution line of the next stage to determine the reactance vale. By the adoption of the technical method, for the distribution lines with the short power supply radius and the large number of sections, the problem of three-section mode overcurrent protection fixed value setting and matching difficulty of feeder line sections of the former stage and the later stage can be well solved.