Distribution network fault unified location method and system based on phasor measurement device

Abstract

The present disclosure relates to a distribution network fault unified location method and system based on a phasor measurement device. The method includes: obtaining the number of the switch corresponding to the fault signal reported by the phasor measurement device; according to the number of the switch corresponding to the fault signal and The network topology description matrix of the distribution network generates a fault judgment matrix; according to the fault judgment matrix, the fault section of the distribution network is located. By only obtaining the number of the switch corresponding to the fault signal reported by the phasor measurement device, the fault judgment matrix can be generated, and the fault section of the distribution network can be located according to the fault judgment matrix, and the phase-to-phase short-circuit fault of the distribution network can be realized. Unified fault location for phase-to-ground faults simplifies the fault location process. Moreover, detecting distribution network faults and reporting fault signals through phasor measurement devices can improve the measurable, observable and controllable efficiency of the distribution network. This unification Fault location is also conducive to the practical promotion of distribution network fault diagnosis and location applications.

Description

technical field [0001] The present disclosure relates to the technical field of electric power engineering, and in particular to a method and system for uniformly locating distribution network faults based on a phasor measurement device. Background technique [0002] Distribution network faults are divided into two categories: phase-to-phase short-circuit faults and single-phase ground faults. Among them, phase-to-phase short-circuit faults have large short-circuit fault currents and are relatively easy to detect, but single-phase ground faults have small ground fault currents, which increases the need to determine single-phase faults. Difficulty at ground fault point. Facing the difference in fault characteristics between phase-to-phase short-circuit faults and single-phase-to-ground faults, and the difficulty of locating fault points, how to uniformly locate the phase-to-phase short-circuit faults and single-phase to ground faults in the distribution network has become a d...

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Problems solved by technology

[0002] Distribution network faults are divided into phase-to-phase short-circuit faults and single-phase ground faults. Among them, phase-to-phase short-circuit faults have large short-circuit fault currents and are easier to detect, but single-phase ground faults have small ground fault currents, which increases the need to determine single-phase faults. Difficulty at ground fault point

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