How to reduce the influence of rain, snow and freezing weather on transmission lines

1. Attention should be paid to the collection of meteorological data in the design. In most ice areas, there is a big difference between the design and the actual ice thickness, almost twice as much as the design, which is also related to the intensity and humidity of the snowstorm, so it is not entirely feasible to improve the design level.

2. It is not easy to adopt the design of twin towers in heavy ice areas, and the design level should be improved if necessary;

3. The clamping force problem of ground wire suspension clamp needs to be solved urgently. In recent years, in many lines designed in heavy ice area, the sag of ground wire has obviously decreased, which leads to the distance between ground wire and conductor can not meet the operation requirements. In some disaster areas, the ground wire is lower than the conductor by more than10m, which is mainly caused by the ground wire slipping, and the slipping is mainly caused by the great difference of the icing load on both sides and the dancing of deicing, and the maximum slipping exceeds10m.

4. The quality of current materials (wire, ground wire, OPGW, suspension clamp) is questionable, so it's hard to say. The old line has survived, and the problems are basically in the new line in recent years. Material problems are worth studying. Of course, is this research useful in the design of material selection and collocation?