Load current monitoring alarm for electric power communication

A load current and alarm technology, applied in the direction of measuring current/voltage, instruments, measuring devices, etc., can solve problems such as cumbersome and complicated methods, affecting normal lines, etc., to avoid interference damage, reduce line-hunting workload, and improve accident handling. The effect of efficiency

Inactive Publication Date: 2016-05-11
STATE GRID SICHUAN ELECTRIC POWER COMPANY NEIJIANG POWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is a fault when there is no automatic monitoring facility, it is inappropriate to find the faulty line by manually closing the switch and cutting off the power one by one. This method is cumbersome and complicated, and affects the normal line.

Method used

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  • Load current monitoring alarm for electric power communication
  • Load current monitoring alarm for electric power communication
  • Load current monitoring alarm for electric power communication

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Embodiment Construction

[0024] The purpose of the present invention is to provide a load current monitoring alarm for electric power communication. We know that when the monitored line is in normal operation, the relevant instruments and meters are put into operation, and the load current is relatively stable. When there is a fault in the monitored line, whether it is grounded or short-circuited, the current will change, and most of them will increase. For this reason, we seized such changing characteristics and designed a power communication load current monitoring alarm to monitor the load current. When it is normal, the instrument remains in its original state. Information for timely analysis and processing, reducing the occurrence and expansion of accidents, and effectively improving the safety and stability of the power communication system.

[0025] When the communication power supply is in normal operation, after calculation and detection, no matter the bus or each branch line, there will be a...

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Abstract

The invention provides a load current monitoring alarm for electric power communication. The alarm comprises a power supply module used for providing power for a load current monitoring alarm body, a sensor module used for acquiring current of a to-be-monitored circuit, a comparison control module used for comparing current acquired by the sensor module with the normal load current, and an alarm module used for controlling on or off of the alarm body according to output results of the comparison control module. According to the invention, the advanced Hall sampling technology is adopted, and reference voltage is arranged for comparison, so working states of an integrated operational amplifier are controlled; and if the to-be-monitored circuit breaks down, a sound-light alarm signal can be given out.

Description

technical field [0001] The invention relates to the field of electric power communication load current monitoring, in particular to an electric power communication load current monitoring alarm. Background technique [0002] In power plants and substations, there are a large number of dispatching commands and operating data that need to be transmitted interactively. To complete such interactive transmission, 48V communication power supply is inseparable. Whether the communication power supply adopts a linear power supply converted from commercial power step-down, rectification, filtering and voltage stabilization, or a switching power supply converted from high-frequency oscillation, it has the characteristics of high importance and high cost. , The load on the power supply is heavy, there are many branch lines, and faults such as impact short circuit and wet grounding often occur. If a fault occurs when there is no automatic monitoring facility, it is inappropriate to find...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165
CPCG01R19/165
Inventor 熊波程鑫李文胜
Owner STATE GRID SICHUAN ELECTRIC POWER COMPANY NEIJIANG POWER SUPPLY
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