Analysis of Deicing Jump Characteristics of Double Circuit Overhead Transmission Lines

The conductor of double circuit overhead transmission lines mostly adopt vertical alignment. The conductor and earthwire will jump during deicing, which will reduce the air gap and cause line outages. This paper analyzes the deicing jump characteristics of 500kV EHV lines and 1000kV UHV double circuit overhead transmission lines in 10mm and 15mm ice areas. The analysis shows that the electrical distance of conductor and earthwire required by uneven icing and deicing jump has less influence on tower size in light ice area. The double circuit tower of 1000kV could be designed without horizontal offset in 10mm and 15mm ice areas.