Fault positioning method and device of power distribution network line, apparatus and medium

Abstract

The invention provides a fault positioning method and device of a power distribution network line, an apparatus and a medium. The method comprises the steps of obtaining a first reclosing traveling wave waveform generated by a circuit breaker from a reclosing moment, enabling a fault selection section element to judge the number of contained fault sections according to an obtained first fault section result, and if only one fault section is contained, taking the first fault section result as a section result of a fault of the power distribution network line, otherwise, using the fault selection section element to compare the first reclosing traveling wave waveform with each second reclosing traveling wave waveform according to the second reclosing traveling wave waveform corresponding to each fault section in the first fault section result, and obtaining the fault section result of the power distribution network line. By adopting the embodiment of the invention, the fault section can be accurately positioned on the basis of realizing the fault distance measurement, so that the accurate fault positioning is realized, the line patrol burden is reduced, and the power supply recovery speed after the power distribution network has a fault is improved.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a fault location method, device, equipment and medium for distribution network lines. Background technique [0002] Fault location is one of the key issues in the field of electrical engineering. Accurate fault location helps to restore power supply quickly and reduce economic losses caused by faults. Different from the transmission network, because the distribution line has a branch structure, the topology is more complex, and usually only the connection between the line and the busbar is equipped with a transformer for measurement, and there is no condition for double-terminal ranging. Therefore, the fault of the distribution network Locating the problem is more difficult. [0003] Due to the complex topology of the distribution network, fault location can be divided into two sub-tasks: fault location and fault section selection. Among them, the fault selection section ...

AI Technical Summary

Problems solved by technology

However, since the distribution network generally does not have the conditions to install multiple measurement points on the feeder, and it is difficult to synchronize the data of all measurement points, it will lead to a high possibility of section determination failure, and it is impossible to achieve accurate fault location

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