Distribution Line Status Smart Sensors

Abstract

The invention discloses an intelligent sensor for the state of a power distribution line, which comprises a DC high-voltage power supply (1), a switch module (2), a signal acquisition module (3) and a protection resistor R0 (4). When the distribution line is in normal operation, the distribution line state intelligent sensor is in an insulating dormant state; when a tripping fault occurs in the line, the switch module (2) receives the conduction signal sent by the computer system, and starts the distribution line state intelligent sensor to detect the faulty line. Detect the status signal of the status signal, and transmit the signal to the computer system for corresponding data processing through the signal acquisition module (3), thereby realizing the intelligent diagnosis of the distribution line fault; after the signal acquisition is completed, the switch module (2) receives the computer system and sends The shut-off signal of the power distribution line makes the intelligent sensor of the power distribution line quit working. The invention has the advantages of simple and compact structure, good reliability, quick start-up of the device, real-time and accurate acquisition and tracking of signals, and the like.

Description

technical field [0001] The present invention mainly relates to the field of fault diagnosis of power distribution lines, in particular to a distribution line state intelligent sensor, which is used for real-time acquisition and tracking of faulty power distribution line state signals, and is used in conjunction with a computer system to realize Intelligent diagnosis of distribution line faults. Background technique [0002] The distribution network is a network that directly distributes electric energy to the majority of power users. Therefore, the safety and reliability of power supply of the distribution network are getting more and more attention. However, due to historical reasons, the distribution network in my country is still very backward. There are still many defects in management and operation and maintenance, so that distribution network failures occur frequently, especially when lightning, pollution, internal overvoltage and many other factors cause distribution n...

AI Technical Summary

Problems solved by technology

In the method based on fault recovery voltage characteristics, the recovery voltage is still less than 10% of the rated voltage of the line. For lines with shunt reactors, due to the compensation effect of the shunt reactor on the distributed capacitance of the line, the recovery voltage amplitude of the fault disconnection phase Smaller, the voltage transformer on the line side has a large error in taking this voltage, and there is a low-frequency oscillation component in the transient fault, which directly affects the effective application of the method based on the recovery voltage characteristics

The method based on the characteristics of instantaneous fault arc is generally less than 5% of the rated voltage of the line, so there are problems of reliability in measurement, analysis and judgment. The effect of the state is difficult to be practical

The method based on the signal attenuation rate of the high-frequency channel is affected by factors such as line length and weather, and cannot be used for lines that do not use high-frequency communication

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