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Evaluation Method of Corrosion Condition of Steel-cored Aluminum Stranded Aerial Conductor

A technology for overhead wires and evaluation methods, which is applied in the fields of weather resistance/light resistance/corrosion resistance, instruments, measuring devices, etc., and can solve problems such as prediction of remaining life without evaluation of corrosion status of overhead wires

Inactive Publication Date: 2011-12-14
ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no effective method for evaluating the corrosion status of overhead wires and predicting the remaining life in China.

Method used

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  • Evaluation Method of Corrosion Condition of Steel-cored Aluminum Stranded Aerial Conductor
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  • Evaluation Method of Corrosion Condition of Steel-cored Aluminum Stranded Aerial Conductor

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Evaluation of the corrosion of steel-cored aluminum stranded conductors in coastal areas simulated by sodium chloride (NaCl) salt spray

[0017] (1) Solution preparation: Use chemically pure sodium chloride (NaCl) to prepare a 45-55g / L sodium chloride (NaCl) deionized aqueous solution, with a pH of 6.5-7.2.

[0018] (2) Test conditions and working parameters: YWX / F-250E salt spray test chamber, the temperature of the test chamber is 35±2℃, and the sedimentation volume is 1-2mL / 80cm 2 ·H. The intermittent spray corrosion method is adopted, every 8 hours of continuous spraying, the machine is stopped, the sample is taken out of the salt spray box, and it is naturally dried in the laboratory for 16 hours to complete a dry / wet corrosion test cycle (24h).

[0019] (3) Test period: 48-480h. Take out samples from the test box at regular intervals for testing.

[0020] (4) Type of overhead wire: LGJ150 / 25 steel core aluminum stranded wire.

[0021] (5) Tensile mechanical performance te...

Embodiment 2

[0028] Sodium bisulfite + sodium chloride (NaHSO 3 +NaCl) Evaluation of corrosion status of steel-cored aluminum-stranded wires in simulated industrial pollution areas with salt spray

[0029] (1) Solution preparation: use chemical pure sodium bisulfite (NaHSO 3 ) And sodium chloride (NaCl) to prepare sodium bisulfite (NaHSO 3 )+sodium chloride (NaCl) aqueous solution (concentration: 10.4g / L sodium bisulfite (NaHSO) 3 ), 0.59g / L sodium chloride (NaCl), pH value is 4.5-5.0).

[0030] (2) Test conditions and working parameters: YWX / F-250E salt spray test chamber, the temperature of the test chamber is 35±2℃, and the sedimentation volume is 1-2mL / 80cm 2 ·H. The intermittent spray corrosion method is adopted, every 8 hours of continuous spraying, the machine is stopped, the sample is taken out of the salt spray box, and it is naturally dried in the laboratory for 16 hours to complete a dry / wet corrosion test cycle (24h).

[0031] (3) Test period: 96-1440h. Take out samples from the test...

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Abstract

The invention discloses a method for evaluating the corrosion status of steel-cored aluminum strand overhead conductors, which includes: (1) sodium chloride and sodium bisulfite+sodium chloride solution used to simulate corrosion conditions in coastal areas and industrial pollution areas (2) Laboratory accelerated corrosion test of unserviced ACSR overhead conductors; (3) Test of tensile strength and electrical conductivity of the inner and outer aluminum strands of corroded conductors to obtain the performance of overhead conductors under given conditions Changes with corrosion time; (4) Tensile strength and electrical conductivity tests of the inner and outer layers of aluminum strands of steel-reinforced aluminum stranded aerial conductors that have served in seaside and industrial polluted areas for different periods of time. Under certain conditions, the relationship between the performance and the corrosion time is simulated to simulate the relationship between the corrosion status and the service time of the actual service wire; Analyze the stranded overhead wires, evaluate the corrosion state and the remaining service life of the wires, and propose a treatment plan for the wires in service.

Description

Technical field [0001] The invention belongs to the technical field of high-voltage power transmission lines, and relates to a steel core aluminum stranded overhead wire, specifically, a method for evaluating the corrosion condition of the steel core aluminum stranded overhead wire. technical background [0002] Overhead conductors are the main body of high-voltage transmission lines. At present, the overhead conductors of my country's high-voltage transmission and distribution network are mainly steel core aluminum stranded conductors. [0003] When the steel core aluminum stranded wire passes through the severely corroded areas such as industrial pollution areas, coastal areas and coastal industrial pollution areas, sea salt ions, smoke and harmful gases discharged from the factory will cause corrosion of the steel core aluminum stranded wires, resulting in reduced strength and resistivity Increases, and even breakage or wire breakage, affects the safety and service life of overh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N3/56G01N3/00G01N27/04
Inventor 陈国宏
Owner ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER
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