Abstract: The high-voltage power transmission lines are currently the most economical means of ensuring long-distance power transmission for centralized new energy. To address issues such as line whipping and adhesion caused by wind disturbances during operation, a new catenary equation is established based on the mechanism of conductor adhesion. This equation quantitatively analyzes the relationship between the critical adhesion current of the conductor and span length, gap disturbance value, ambient temperature and design wind speed for load flow. The study shows that: the larger the span length, the smaller the critical adhesion current and the smaller the allowed gap disturbance value; the critical adhesion current has an almost linear relationship with ambient temperature, increasing as the ambient temperature rises; the critical adhesion current decreases rapidly with the increase of design wind speed for load flow, and then decreases slowly.

    Key words: centralized new energy; vertical double bundled conductor; disturbance adhesion; adhesion current; span length; splitting distance