Distribution network fault location method with high fault-tolerant rate

Abstract

The invention discloses a distribution network fault location method with a high fault-tolerant rate belonging to the technical field of AC distribution network fault diagnosis. The method achieves the fault location by comparing an overcurrent information matrix uploaded during a FTU fault with an overcurrent information matrix formed according to a network topology, and specifically includes: mapping a distribution network into a directed graph; according to the directed graph of the distribution network, obtaining an ideal fault matrix D; obtaining an reported information matrix G accordingto the information actually uploaded by the FTU; making subtraction on the ideal fault matrix D and the reported information matrix G to obtain a fault discriminant matrix P, thereby obtaining a fault region; and in view of missed reporting and false reporting, establishing a fault location criterion, and simulating a fault condition that the FTU generates missed reporting and false reporting according to the fault location criterion and a corresponding conditional probability. The method is simple in reasoning and good in fault tolerance. Particularly for the missed reporting and false reporting of the FTU, the provided fault location discrimination method and the expanded fault location region can improve the positioning accuracy.

Description

technical field [0001] The invention belongs to the technical field of AC distribution network fault diagnosis, and in particular relates to a distribution network fault location method with high fault tolerance rate. Background technique [0002] With the rapid development of the national economy and the continuous improvement of people's living standards, urban and rural distribution networks have been greatly developed. While the power load is growing rapidly, users have higher and higher requirements for power supply reliability and power quality. As the terminal link of serving users, the distribution network can accurately analyze the fault, quickly locate the fault, and effectively isolate the fault after the fault occurs, which can minimize the loss of users, improve the reliability of power supply and ensure the safe and stable operation of the system. [0003] With the improvement of distribution network automation level, a large number of automatic terminal equipm...

AI Technical Summary

Problems solved by technology

Compared with the direct algorithm, the indirect algorithm has a certain error tolerance rate in the face of FTU false positives and false positives. However, in the face of complex multi-section distribution networks, the dimension of the solution increases, which makes the solution speed decrease and is prone to mislocation.

Therefore, the problem of fault location in the distribution network has not been effectively solved to a certain extent, and it is necessary to propose a method that is simpler, more efficient and has higher fault tolerance

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