Background

A 110kV overhead distribution line close to lakes and paddy fields operated in a high-humidity environment all year round. The conductor was prone to accumulate moisture and mildew, resulting in electrochemical corrosion. The aluminum strand appeared black spots and rust, and the contact performance of the fitting connection part was reduced, leading to local heating and increasing line loss.

Solution

Anti-corrosion grease with excellent moisture resistance, mildew resistance and electrical insulation was applied. Key treatment was carried out on the conductor fitting connection, suspension point and easily accumulated moisture section. The grease blocked the penetration of humid air and condensed water, inhibited mold growth, and improved the contact stability of the conductor.

Effects

After 3 years of application, the humid corrosion and mildew on the conductor surface were completely eliminated, the contact resistance of the connection part was stable, the local heating fault was zero, and the line loss was reduced by about 5%. The service life of the conductor was effectively extended, and the operation reliability of the waterside distribution line was improved.