Inter-turn short circuit fault locating system and method

Abstract

The invention discloses an inter-turn short circuit fault locating system and method. The system comprises a pulse generating unit, a data acquisition unit, a protection unit, a fault judgment and positioning unit, a data storage unit, and a display unit. The output end of the pulse generating unit is connected with both ends of a rotor coil; the input end of the data acquisition unit is connectedwith both ends of the rotor coil through the protection unit; the output end of the data acquisition unit is connected with the input end of the fault judgment and positioning unit, and the data storage unit and the display unit are connected with the fault judgment and positioning unit. The invention has the advantages of simple structure, reliability, small size and light weight, and protects the data acquisition unit through the protection unit, so as to prevent damage to the system caused by overvoltage or overcurrent; fault judgment and fault location of the tested coil are realized by similarity calculation; the coil fault location efficiency is improved and the diagnosis result is more reliable.

Description

technical field [0001] The invention belongs to the technical field of coil inter-turn short-circuit fault diagnosis, and relates to an inter-turn short-circuit fault location system and method. Background technique [0002] As the core power component of the power system, it is responsible for the main power production tasks, and its operation reliability directly affects the safe operation of the power grid. With the rapid development of the power industry and the continuous increase of the installed capacity of power plants, the reliability of operation is required to be higher and higher. Once a fault occurs, especially a malignant fault, it will affect the normal operation of the entire power system and bring huge losses to the national economy. Investigations and studies have shown that: in large groups that have been in operation, coil turn-to-turn short circuit is one of the typical faults, and it accounts for a large proportion of the total number of faults. There...

AI Technical Summary

Problems solved by technology

This invention focuses on how to use the database record information of the characteristic waveform matched with the response difference waveform obtained by detection to determine the inter-turn short-circuit fault location of the rotor. Since the data acquisition terminal needs to be connected to the coil, it does not mention the data The acquisition unit takes corresponding protection measures, and does not give a clear method for how to match the response difference waveform obtained by the test with the characteristic waveform in the database, and the similarity between the corresponding difference waveform and the characteristic waveform in the test is The key to this positioning method

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