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Fault intelligent positioning method of relay protection system and system thereof

A relay protection and intelligent positioning technology, which is applied in the direction of fault location, measurement of electricity, and measurement of electrical variables, can solve the problems of lack of intelligent diagnostic equipment and methods, ineffective detection, and complex secondary circuits, etc., to achieve perfect fault classification, It is conducive to on-site accident analysis and rapid positioning, and the effect of saving labor costs

Pending Publication Date: 2021-12-28
NANJING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

The secondary circuit is composed of many relays and cables connecting equipment, which has the characteristics of many points and scattered. The determination of its working status is completed through partial self-inspection and personnel inspection, lacking intelligent diagnostic equipment and methods
For a long time, due to the complexity of the secondary circuit related to relay protection, it cannot be effectively detected

Method used

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  • Fault intelligent positioning method of relay protection system and system thereof
  • Fault intelligent positioning method of relay protection system and system thereof
  • Fault intelligent positioning method of relay protection system and system thereof

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Experimental program
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Embodiment Construction

[0035] combine figure 1 , the present invention a kind of fault intelligent location method of relay protection system, comprises the following steps:

[0036] Step 1. Collect historical data of relay protection system faults, analyze fault phenomena and causes of faults, classify relay protection system fault types, and subdivide each fault type into multiple fault subtypes;

[0037] Step 2. Calculate the occurrence probability of each subtype according to the divided fault types, and screen out the relay protection fault subtypes whose probability is higher than the threshold;

[0038] Step 3. Set up relay protection fault simulation experiments, simulate the high-frequency relay protection faults screened out in step 2, collect fault experiment data, and merge fault data to form a fault database;

[0039]Step 4. Use the fault location matrix rule to number the experiments in step 3. This rule can combine the relevant relay protection fault types and fault location matrix i...

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Abstract

The invention discloses an intelligent fault positioning method for a relay protection system and a system thereof. The method comprises the following steps: classifying faults of the relay protection system; simulating faults of the relay protection system in an experimental mode, and establishing a fault database; collecting, preprocessing, normalizing and synthesizing the fault data; in order to distinguish fault types, providing a hexadecimal fault positioning matrix and a corresponding binary configuration rule, and connecting fault points with an intelligent positioning method; and performing deep learning on the fault data by taking a deep neural network DNN, a synthetic minority class oversampling technology SMOTE and a random forest RF as bases, training and storing deep learning parameters, and obtaining a complete intelligent positioning method. According to the invention, relay protection personnel can be helped to quickly position faults, the troubleshooting time of the secondary circuit is shortened, and the accuracy and efficiency of positioning are greatly improved.

Description

technical field [0001] The invention relates to the field of relay protection of electric power systems, in particular to a fault intelligent location method and system of the relay protection system. [0002] technical background [0003] With the development of the scale of the modern power grid and the increasing number of equipment, the traditional regular maintenance mode of relay protection is no longer suitable for the production and operation needs of the power grid. As the first line of defense of the power grid, the quality of operation and maintenance of relay protection equipment will directly affect the safe and stable operation of the power grid. Therefore, it is necessary to explore a new mode of relay protection maintenance. The circuit of the relay protection system is divided into two parts, one part is the communication circuit with self-test capability; the other part is the secondary circuit such as AC circuit, DC circuit and working power circuit which l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327G01R31/08
CPCG01R31/327G01R31/088
Inventor 王宝华郦阳蒋海峰
Owner NANJING UNIV OF SCI & TECH
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