Distribution network topology guard method with direction

Abstract

The invention discloses a distribution network topology guard method with a direction. The distribution network topology guard method with the direction comprises the following steps: leading in voltage and current in a distribution network automated terminal to judge whether a feeder breaks down and to find out a broken-down direction. (1) Power distribution terminals form a distribution network topology structure and each power distribution terminal is linked with the distribution network automated terminal of adjacent nodes through lateral communication; (2) among subsection switches distributed in the power distribution network, if overflowing failures of lines are detected by adjacent power distribution terminals in a certain distribution network section, and the direction of the failure current detected by the distribution network terminals does not direct the outside of the distribution network section, the distribution network section is a fault section. A network topology guard theory is used for achieving the location, isolation and recovery of the fault section from the terminal on the spot. The distribution network topology guard method with the direction solves the problems of a fault location and isolation when the feeder in a dual power loop closing power supply system is malfunctioned, so that the location and isolation of the fault section and the power restoration of a non-fault section can be achieved on the spot, quickly and accurately.

Description

technical field [0001] The invention relates to a method for realizing power distribution network topology protection for power systems and a device adopting the method, which are suitable for feeder automation with dual power supply ring power supply in the field of distribution network automation. Background technique [0002] The existing feeder automation schemes that can be applied to actual projects mainly include: centralized schemes, voltage-time schemes, and implementation schemes for distribution network topology protection. [0003] In the centralized solution, the distribution network automation terminal sends the detected overcurrent fault signal to the master station (substation), and the master station (substation) realizes fault isolation and recovery according to the overall topology of the line. This kind of scheme must locate and isolate the fault area gradually after the protection of the feeder switch of the substation trips and the entire feeder line is...

AI Technical Summary

Problems solved by technology

[0004] Voltage-type feeder automation realizes localized fault judgment and isolation through the basic principle of "no voltage is divided, and voltage is closed", but it is mainly suitable for overhead lines, not for cable lines

In addition, multiple overlaps are required to accurately locate the fault, which has a great impact on the system

[0005] The feeder automation scheme based on distribution network topology protection can realize fault isolation and recovery on the spot, but because there is no direction for fault judgment, it is generally only applicable to lines powered by a single power supply. not applicable

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