Method for generating transverse fault isolating area of distribution network

Abstract

The invention relates to a method for generating a transverse fault isolating area of a distribution network, belonging to the field of automatic scheduling of power systems. The method comprises: firstly, establishing a node set involved by fault equipment, initializing all node fault marks as false, then traversing the node set, performing topological search based on breadth-first, and marking the faults of nodes as true in the searching process; in the presence of a node of which the fault mark is true, no longer performing lower search of the node; and in the presence of a switch not belonging to the fault equipment set, stopping the lower search of the node and keeping the switch as a fault isolating switch, wherein line segments in a single-end equipment set mounted by the nodes obtained by traversing the fault node set and a fault line set jointly form a fault isolating area, and the switch included in the fault switch set is a fault isolating switch. The method can be used for analyzing the fault isolating switch and the transverse fault isolating area in real time, so as to recover the control as early as possible and improve the power supply reliability.

Description

technical field [0001] The invention belongs to the field of power system scheduling automation, and in particular relates to a method for generating a horizontal fault isolation area of ​​a distribution network. Background technique [0002] The distribution network directly faces users, and the reliability of power supply has always been the top priority of distribution network assessment. Due to the many and complex wiring methods, the wide jurisdiction area, and the low height of overhead lines to the ground, the distribution network has a high probability of failure, high frequency, and many types. Due to the current distribution network is relatively weak and the reliability of power supply is poor, the rural distribution network generally has only one power supply path, and the urban distribution network mostly adopts hand-in-hand and other methods to ensure two-way power supply paths for important users. Once a fault occurs in the distribution network, it will gener...

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Problems solved by technology

[0005] At present, the basic conditions of the distribution network are not perfect, and the relay protection device to deal with the fault generally adopts the current protection; the remote signal of the switch cannot be collected in real time, so the dispatching and operation personnel cannot obtain the detailed information of the fault in time. The indicator can determine the location of the fault, but the fault isolation area (where the fault is located and the area formed by the fault isolation switch) cannot be known. Only experience and manual communication with the site are used to formulate a power restoration plan. This process is time-consuming and error-prone. It may even cause a larger-scale and extensive power outage due to misoperation

[0006] Most of the existing fault location technologies rely entirely on the fault indicator, which can only make a certain estimate of the fault location, and cannot analyze the fault isolation area. The dispatcher cannot immediately know the switch that isolates the fault and the location of the fault in the isolated fault area. device of

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