Line system for self-healing line

Abstract

The present invention relates to the technical field of power grids, in particular to a line system for a self-healing line. Several outdoor switch boxes are arranged between main power supply lines of two transformer substations. Outlet switches are arranged between the main power supply lines and the transformer substations. Two normally closed switches are arranged in the outdoor switch box andare connected with a protection system. The two normally closed switches are respectively connected with the main power supply lines of the two transformer substations. Contact switch boxes are alsoprovided, which are connected with the bus of a backup transformer substation through a backup line. The backup line is provided with outlet switches. The contact switch box is arranged between any two adjacent outdoor switch boxes. There is a pathway between the contact switch box and the outdoor switch box. The pathway between the contact switch box and the outdoor switch box is provided with normally open switches connected with a protective terminal. The contact switch box is provided with normally closed switches connected with the protective terminal on the backup line. The contact switch box is provided with a voltage sensor. The invention has the advantages of shortening the power restoration and improving the power supply reliability.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a line system for realizing line self-healing. Background technique [0002] In the medium-voltage distribution network cable lines, the self-healing technology based on local feeder automation means that after the line fails and is successfully isolated, the contact switch is closed, and the non-faulty section of the faulty line is transferred to the contact line for power supply, thereby shortening the power recovery time of the line , Improve line power supply reliability. At present, the self-healing technology is mostly used in the "2-1" single-ring network connection mode. The "2-1" single ring network wiring mode has high power supply reliability, simple wiring, and convenient operation, but the line utilization rate is low, only 50%. In order to improve the line utilization rate, the "2-1" single-ring network connection mode was transformed to form a "two supplies a...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of low line utilization in the self-healing technology of the power grid described in the prior art, the present invention provides a line system for realizing line self-healing, which has the advantages of shortening the recovery time of power supply and improving the reliability of power supply

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