Lightning-inductive shielding line for 10KV overhead insulated conducting wire for preventing thunderstrike breakage

An overhead insulated wire, 10KV technology, applied in the field of lightning protection for medium-voltage overhead insulated lines, can solve the problems of high quality requirements for insulated wires, damage to insulated wires, and affecting the life of insulated wires, so as to reduce lightning strikes, prolong service life, Implement simple and convenient effects

Active Publication Date: 2006-05-24
JIANGSU ELECTRIC POWER COMPANY YANGZHOU POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method damages the insulated wire and affects the life of the insulated wire, and

Method used

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  • Lightning-inductive shielding line for 10KV overhead insulated conducting wire for preventing thunderstrike breakage
  • Lightning-inductive shielding line for 10KV overhead insulated conducting wire for preventing thunderstrike breakage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] An induction lightning shielding wire 4 is set in the middle of the three-phase insulated wire 1 of the 10KV triangular overhead line of the single circuit. The distance between the shielding wire 4 and the insulated wire 1 is 0.20m to 1m, and the shielding wire 4 is installed and connected to the overhead line. On the cross arm 3 of the pole 2, the two ends and the middle of the shielded wire are provided with mandatory grounding every 2 to 5 poles, and the grounding resistance is less than 30 ohms.

Embodiment 2

[0016] Lay two induction lightning shielding wires 4 between the two rows of insulated wires 1 in the double-circuit 10KV vertically arranged overhead line. The distance between the shielding wire 4 and the insulated wire 1 is 0.20m to 1m. The shielding wire 4 is installed and connected to the overhead line. On the cross arm 3 of the pole 2, the two ends and the middle of the shielded wire are provided with mandatory grounding every 2 to 5 poles, and the grounding resistance is less than 30 ohms.

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PUM

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Abstract

Induction thunder shield wire for lightning protection is laid near to overhead insulated conductor. Distance between shield wire and insulated conductor is 0.20m ¿C 1m. The shield wire is installed and connected to cross arm of wire pole of overhead line. Two ends of shield wire, and every 2-5 pieces of wire pole in middle are grounded enforcedly. Ground resistance is less than 30 ohm. Advantages are: advance method, low cost, small quantity of maintenance work. The shield wire shows good effect for lowering thunder inducted voltage on the overhead insulated conductor. The method is suitable to 10KV overhead insulated conductor for lightning protection.

Description

technical field [0001] The invention relates to a method for applying an induction lightning shielding wire to a 10KV overhead insulated wire to prevent wire breakage caused by induced lightning overvoltage, and belongs to the technical field of lightning protection for medium-voltage overhead insulated wires. Background technique [0002] The 10KV overhead insulated lines have a single circuit in a triangular arrangement and a double circuit in a vertical arrangement. There are two kinds of lightning overvoltages generated on overhead insulated lines, one is the direct lightning overvoltage caused by lightning directly striking the line, and the other is the induced lightning overvoltage caused by electromagnetic induction near the lightning strike line. About 20% of the lightning strikes on 10KV distribution lines are direct lightning strikes, and more than 50% of them are direct lightning strikes with a current exceeding 20kA; about 80% are induced lightning strikes, and ...

Claims

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Application Information

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IPC IPC(8): H02G13/00H02G7/22
Inventor 陈立清李长益刘忠曹庆文周源吴敏秀
Owner JIANGSU ELECTRIC POWER COMPANY YANGZHOU POWER
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