Common-tower double-return compact type corner transmission iron tower

Abstract

All new type of corner electric power pylon different from drum type pylon can realize 100% purpose for building compact type transmission line with dual loop in same pylon. Cooperating to compact type straight-line pylon, the corner pylon arranges conducting wires in del shape, and space between wires in three phases being same as straight-line pylon. The corner pylon includes three layers of cross arm: earth wire, upper conductor, and lower conductor. Three layers of cross arm are distributed on two sides of pylon and in same vertical plane. The cross arm of upper conductor is in use for suspending conductor in two phases; and the cross arm of lower conductor is in use for suspending conductor in lower phase. Small cross arms are added on cross arms of earth wire and upper conductor in order to solve issue of wire jumper. Features are: shrunken size of pylon head, shorter 12.0m than height of general type, light weight and raised capability of lightning proof.

Description

technical field [0001] The invention relates to a power transmission equipment, especially a brand-new power transmission tower used in a 500 kV double-circuit power transmission line on the same tower. Background technique [0002] At present, the corner transmission towers used in my country's 500 kV double-circuit transmission lines on the same tower are conventional towers with three-phase wires arranged vertically and hung on both sides of the tower. The height of the iron tower usually reaches 60m ~ 70m, occupying an average of 22m in the line corridor. [0003] like figure 1 As shown, it is the existing conventional corner iron tower of double circuit 500kV line on the same tower. For example, the 27.0m high tower has a total height of 57.0m, and the single base tower weighs 56.0t. The 4×400 conductors are vertically arranged, and the root opening is 15.0m×15.0m. Covering an area of ​​225.0m2. In addition, at present, the corner towers of conventional 500kV double-...

AI Technical Summary

Problems solved by technology

In addition, at present, the corner towers of conventional 500kV double-circuit parallel transmission lines on the same tower in my country are not suitable for use on compact 500kV double-circuit parallel parallel transmission lines on the same tower.

If you insist on using the conventional corner tower type, the line conductor will be partially raised, and the lightning resistance level will be reduced, which is not the original intention of building a compact transmission line.

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