Power restoration protection method suitable for distributed feeder automatic power distribution terminals

Abstract

The invention relates to the field of power supply systems, and discloses a power restoration protection method suitable for distributed feeder automatic power distribution terminals. The method is characterized in that multiple switch controllers in the same ring main unit transmit signals to each other through a GOOSE protocol; adjacent ring main units transmit signals through fiber channels; incase of a line fault, the ring main unit that makes an operation transmits an operation result signal to the ring main unit at the next level, and transmits the signal to an open-loop point step by step, or directly transmits the operation result signal to the open-loop point; the open-loop point determines whether the operation result signal is a fault isolation success signal and whether the open-loop point itself is in a unilateral voltage-loss state; and the open-loop point is closed when both conditions are satisfied simultaneously, otherwise, the open-loop point is not closed. The method transmits signals between the ring main units through the fiber channels, realizes fast-acting feeder automation in combination with the fastness of GOOSE transmission in the ring main units, improves the reliability of distribution end line protection, shortens fault isolation operating time and improves the stability of the signal transmission.

Description

technical field [0001] The invention relates to the field of electric power supply systems, in particular to a power supply recovery protection method suitable for distributed feeder automatic power distribution terminals. Background technique [0002] According to the current situation of distribution network construction, the realization of distribution network automation is through the use of automation devices or systems to monitor the operation status of the distribution network, detect faults in the distribution network in time, locate faults, isolate and restore power supply to non-faulty areas. At present, the centralized and local modes are mainly adopted for fault handling of feeder automation. [0003] The centralized feeder automation mode uses communication means, through the cooperation of the power distribution terminal and the power distribution master station, and relies on the power distribution master station to judge the fault area when a fault occurs, an...

AI Technical Summary

Problems solved by technology

The current implementation of local feeder automation is mainly voltage-time type and self-adaptive comprehensive type. These two methods need to rely on the reclosing action of the outlet circuit breaker of the substation to cooperate, and the action time is relatively long.

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