On-site intelligent full-delay stage difference coordination method employing feeder automation and application

Abstract

The invention relates to an on-site intelligent full-delay stage difference coordination method employing feeder automation and an application. The advantages of ''on-site isolation'' of relay protection and ''self-recovery'' of feeder automation are combined and the power outage range is preferentially reduced to the greatest extent through the on-site isolation of relay protection in case of a line fault; and if the time delay margin of substation protection is large, full-delay stage difference coordination is formed through the substation protection and a feeder terminal to ensure the protection selectively, that is to say, the fault of any point is isolated through local protection, a non-fault area is not powered off and function self-recovery is achieved through the feeder automation in a transient fault.

Description

technical field [0001] The invention relates to the field of wiring fault inspection and maintenance, in particular to an on-site intelligent feeder automatic full-delay differential coordination method and mode application. Background technique [0002] Feeder automation is the use of automation devices or systems to monitor the operating status of the distribution network, detect faults in the distribution network in time, and perform fault location, isolation, and restoration of power supply to non-faulty areas. In recent years, for different types of power supply areas, the construction of intelligent distribution network adopts the principle of differentiation, and the fault handling of feeder automation can adopt centralized and local models. Local feeder automation does not rely on communication, and completes fault handling through equipment self-protection or timing cooperation. The traditional recloser-type feeder automation is divided into voltage time type, volt...

AI Technical Summary

Problems solved by technology

[0006] (1) Any point of failure in the distribution line will cause the outlet switch of the substation to trip, which will cause a power outage on the whole line, expand the power outage area, and reduce the reliability of power supply;

[0007] (2) When the distribution line is permanently faulty, the outlet switch of the substation must be reclosed twice before the power supply can be restored, that is, the non-faulty area will experience two short-term power outages;

[0008] (3) If a fault occurs near the outgoing line end, the short-circuit current is large, and the secondary coincidence will have a large impact on the primary equipment of the substation, reducing the service life

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