Method for repairing high-voltage-side open-phase fault of distribution transformer

Abstract

The invention, which relates to the field of open-phase determination method, discloses a method for repairing a high-voltage-side open-phase fault of a distribution transformer. At present, problemsof being lacking of a real-time performance and insufficient intelligent degree in the open-phase determination exist. The method comprises steps of data acquisition, data matrixing, high-dimensionalfeature extraction, multi-feature fusion, fault tracing, and high-voltage open-phase fault diagnosis. According to an MP-Law-based spectral analysis and a Ring-Law-based average spectral radius index,an LES Statistical indicator system and visualization are established and thus an open-phase determination indicator is constructed; operation and environmental information of a distribution networkare fused, a fault influence factor is analyzed, modeling of an equipment state evolution process is carried out based on a time sequence, relevant indicators are formed by using a random matrix and thus the state of the grid line is evaluated, so that the guidance is provided for the repairing setting of the distribution network. Corresponding resources are allocated for all types reasonably andthe reasonable allocation of maintenance resources is realized; and the allocation of maintenance resources of the distribution network is optimized, so that the emergency repair becomes accurate.

Description

technical field [0001] The invention relates to a method for judging a lack of phase, in particular to a repair method for a phase loss fault at a high-voltage side of a distribution transformer. Background technique [0002] During the normal operation of the transformer, due to the drop of foreign objects in the environment or overloading of the load, a certain phase line on the high-voltage side is disconnected or the fuse is blown, which will further cause the other two-phase current to increase suddenly and the temperature of the transformer coil to rise. It is very easy to cause the transformer to burn out, cause some unsafe accidents, and cause great personal and economic losses to residents and factory users. In the most traditional operation and maintenance of transformers, due to the low degree of equipment automation, most of the problems are checked by manual inspection and manual reporting, which is extremely inefficient. In recent years, with the popularizatio...

AI Technical Summary

Problems solved by technology

It takes 15 minutes for the intelligent distribution transformer terminal to remotely send data to the intelligent public transformer monitoring system, while the intelligent public transformer monitoring system needs at least 30 minutes (two uploading cycles) to judge the lack of phase on the high-voltage side. The next manual link is in There is also great uncertainty in time, and the real-time performance of the whole process is far from meeting the requirements;

[0006] Second, the degree of intelligence is not deep enough

In the whole process, there are many contents that require manual participation, such as analyzing the content of alarm event information, publishing power outage information, dispatching orders for maintenance, etc. The intelligent and information system used in the process cannot track the whole process of handling this problem and monitoring

Images