A double-loop transposition tower and transposition method

Abstract

The invention provides a double-circuit transposition tower and a transposition method. The double-circuit transposition tower comprises a first main tower body, an auxiliary tower body on the left side of the first main tower body, and a second main tower body on the right side of the first main tower body. A first wire jumper part and a second wire jumper part are arranged on the right side of the auxiliary tower body, and a first wire jumper frame and a second wire jumper frame are further arranged on the auxiliary tower body. The first main wire jumper frame extends around the auxiliary tower body to form a plurality of supports with the free ends connected with lower insulator chains. The free end of the second wire jumper frame is connected with a first upper insulator chain. A firsthanging point, a second hanging point and a third hanging point are arranged on the first main tower body, and a fifth wire jumper part and a sixth wire jumper part are arranged on the right side ofthe first main tower body. A fourth hanging point, a fifth hanging point, a sixth hanging point, a third wire jumper frame and a fourth jumper frame are arranged on the second main tower body. The third wire jumper frame extends around the second main tower body to form a plurality of supports with the free ends connected with lower insulator chains, and the free end of the fourth wire jumper frame is connected with an upper insulator chain. According to the double-circuit transposition tower and the transposition method, all wire jumpers can meet the requirement of electrical clearances.

Description

technical field [0001] The invention relates to the technical field of transmission lines, in particular to a double-circuit transposition tower and a transposition method. Background technique [0002] During the power transmission process of the transmission line, the three-phase conductors generate capacitance to the ground respectively, and with the extension of the transmission line, the capacitive reactance values ​​of the three-phase conductors are not equal, which will cause the obtained transmission parameters of the three-phase conductors to be unequal, and even cause Zero sequence current and negative sequence current. Zero-sequence current and negative-sequence current are likely to cause line and motor failures and affect normal power transmission. Therefore, it is necessary to ensure that the capacitive reactance values ​​of the three-phase wires are equal. In a double circuit, it is necessary to transpose the three-phase wires in the two circuits through a tr...

AI Technical Summary

Problems solved by technology

[0005] In the transposition tower provided by the prior art, there must be a line jumper arranged outside the angle between the corresponding front insulator string and the rear insulator string during transposition. When the line angle is large, such as greater than 20°, At this time, the angle between the front insulator string and the corresponding rear insulator is small, and the distance between the mid-phase jumper and the lower-phase jumper of this circuit and the transposition tower is too small, which does not meet the requirements of the electrical clearance

Images