A simulation test platform for lightning strike disconnection of insulated conductors in 10kv distribution network

Abstract

The invention discloses a simulation test platform for lightning-caused breaking of an insulated wire in a 10kV distribution network. The simulation test platform includes an impulse voltage unit, a simulation tower wire unit, a power frequency current source unit and a data acquisition unit, wherein the impulse voltage unit is connected to an insulated pillar on a tower at one side through the insulated wire; the impulse voltage unit is used to provide a simulation lightning impulse voltage to the insulated wire on the tower; the power frequency current source unit is connected to an insulated pillar on a tower at the other side through a third insulated wire; the power frequency current source unit is configured to provide a set power frequency current to the insulated wire on the towerafter the impulse voltage unit generates the simulation lightning impulse voltage and after the first preset time period; and the data acquisition unit is used to collect lightning overvoltage and thewire current on the insulated wire. Through the technical solution in the simulation test platform for lightning-caused breaking of an insulated wire in a 10kV distribution network, after simulationlightning impulse voltage is broken down and insulated, a continuous power frequency current is provided for the generated arc to improve the authenticity of the lightning-caused breaking test.

Description

technical field [0001] This application relates to the technical field of lightning strike test, in particular, to a simulation test platform for lightning strike disconnection of insulated conductors of 10kV distribution network. Background technique [0002] With the large-scale transformation of the distribution network, more and more distribution network lines are transformed from bare wires to insulated wires. For such a distribution network composed of insulated wires, lightning strikes and disconnection are the cause of engine power distribution network faults. main reason. For the existing power distribution network, because there are lightning protection devices on the line, the lightning current on the insulated line exists for a short time. After the insulation layer of the insulated line is broken down, it is usually due to the continuous power frequency current, resulting The insulated wire is blown. Therefore, it is necessary to study the performance of the in...

AI Technical Summary

Problems solved by technology

For the existing power distribution network, because there are lightning protection devices on the line, the lightning current on the insulated line exists for a short time. After the insulation layer of the insulated line is broken down, it is usually due to the continuous power frequency current, resulting The insulated wire is blown, therefore, it is necessary to study the performance of the insulated wire after lightning strike to prevent the insulated wire from being blown by power frequency current

[0003] In the prior art, due to the lack of a corresponding lightning strike disconnection test platform, the existing lightning strike disconnection test for insulated conductors is artificially divided into two parts, one part is the lightning impact test, and the other is the power frequency current combustion test. Some experiments study the arc burning results of insulated wires. Such test methods reduce the authenticity and reliability of the lightning disconnection test data, and cannot provide an effective theoretical basis for related lightning disconnection protection devices.

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