Air cooling fault alarm device applied to substation transformers and working method thereof

Abstract

The invention discloses an air cooling fault alarm device applied to substation transformers, which comprises air cooling intervals corresponding to fan groups, a single-chip microcomputer connected with the air cooling intervals, and a background computer communicating with the single-chip microcomputer. Each air cooling interval is connected with the signal input end of the single-chip microcomputer through a wire, and the power loss of the fan group in each air cooling interval is transmitted to the single-chip microcomputer through the wire. According to the invention, each fan interval isconnected with the single-chip microcomputer, the power loss of the fan intervals is transmitted to the single-chip microcomputer and processed by an 8421 decoder, and then, a signal is transmitted to the background to determine which fan interval has a fault. Based on the original fault alarm signal, the single-chip microcomputer is added to realize intelligent alarm. By adding a simple circuitboard, which fan interval has a fault is determined accurately after program processing, and the time for preparing spare parts is directly shortened. The maintenance personnel can also reasonably arrange the time of fault elimination according to the emergency degree of the fault.

Description

technical field [0001] The invention relates to the technical field of power transmission and transformation, in particular to an air-cooling fault alarm device applied to transformers in substations and a working method thereof. Background technique [0002] The main transformer, referred to as the main transformer (GSU), is a general step-down transformer mainly used for power transmission and transformation in a unit or substation, and is also the core part of the substation. The transformer is the core equipment of the electric locomotive traction power supply system, and also the key equipment to ensure the safe and stable operation of the traction power supply system. [0003] The capacity of the main transformer is generally relatively large, and requires high reliability of work. Although the failure rate of the main transformer is not high, once a failure occurs, it will cause significant losses. If it is light, it may cause equipment failure; if it is heavy, it w...

AI Technical Summary

Problems solved by technology

[0004] Now when the air-cooling fault occurs in the main transformer of the substation, no matter how many fault points there are, only the same air-cooling fault signal can be sent out, which is not conducive to the maintenance work

Because the number and specific location of the fault points cannot be determined, after a fault occurs, the maintenance personnel do not know the urgency of the work, and need to rush to the scene immediately every time, which increases the workload of the maintenance personnel

In addition, in order to ensure on-site demand, maintenance personnel need to prepare a large number of spare parts to prolong the maintenance time

Because the main transformer cannot cool down in time, when the temperature of the main transformer exceeds the normal value, according to the "6-degree rule", every 6 degrees of oil temperature increase will double the insulation aging speed, which will affect the operating life of the main transformer

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