Distribution network fault location method based on incomplete distribution information fusion

Abstract

The invention discloses a power distribution network fault locating method based on incomplete marketing and distribution information fusion, comprising dividing all power supply users of a distribution network into a plurality of power supply regions, and reading alarm information; layering devices in dependence on the alarm device in each power supply link and the alarm information; reading a first fault maintenance telephone call message as a current fault maintenance telephone call; finding a power supply link corresponding with the current fault maintenance telephone call, and calculating the fault membership degree of each layer of devices in handling the current fault maintenance telephone call; calculating the final fault membership degree of each device after handling the current fault maintenance telephone call; and determining the fault section of a current power supply link in dependence on the final fault membership degree of each device. The power distribution network fault locating method meets the fault locating requirements of fault tolerance and rapidity, and has the advantages of high fault locating accuracy, sound fault tolerance, and fast positioning speed.

Description

technical field [0001] The invention relates to a distribution network fault location technology, in particular to a distribution network fault location method based on fusion of incomplete distribution information. Background technique [0002] With the stable development of the power system, the automation level of the distribution network is becoming higher and higher, and a large number of automation devices have been successfully applied to the distribution network. However, due to the limitation of construction costs, distribution automation is generally only built in load-intensive areas, and is usually implemented step by step. Many power supply areas with a low level of automation, especially the vast rural areas, have outdated equipment, mixed structures, backward protection, lack of standardized management and regular maintenance, and are easily affected by the surrounding environment and climate. Difficulties, poor safety and reliability, etc. [0003] The dist...

AI Technical Summary

Problems solved by technology

However, considering the limited funds, many branch lines are equipped with only a few or no information collection devices, so the corresponding switch status information cannot be provided. Therefore, this method can only reduce the scope of manual line inspection, and cannot locate the specific fault section.

In addition, because most of the alarm devices are passive detection, relying on the change of the distribution network parameters before and after the fault occurs, if the fault signal itself is weak, or is polluted by electromagnetic interference and harmonics, the signal distortion will be large, which will easily lead to the malfunction of the protection device Or refuse to move, which affects the accuracy of the alarm information, especially when the communication signal in the installation environment is unstable, it is also very easy to cause the alarm information to be missed

Therefore, the method based on equipment alarm information has considerable limitations, and it is difficult to locate the faulty section accurately and in detail

[0004] Regardless of the positioning method based on the fault report telephone or the equipment alarm information, considering the influence of subjective factors of power supply users and the uncertainty of alarm information, the theoretical accuracy rate is not very high

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