Special transposition rod for existing single-circuit tension-resistance tower

Abstract

The invention relates to a special transposition rod for an existing single-circuit tension-resistance tower. The special transposition rod for the existing single-circuit tension-resistance tower comprises a rod body, cross arms, supporting insulators and a wire supporting tube. The cross arms are positioned at the top of the rod body. One cross arm is arranged in the direction perpendicular to acircuit, one cross arm is arranged in the direction which is back on to the established tension-resistance tower and forms a 30-degree included angle with a back edge phase conductor, one cross arm is arranged in the direction which is back on to the established tension-resistance tower and forms a 30-degree included angle with the other back edge phase conductor, and the length of the three cross arms is equal. The supporting insulators are fixed to the top end of the rod body of the special transposition rod and at the end parts of the three cross arms, and a wire supporting tube arranged in the direction perpendicular to the circuit is arranged on the end portions of supporting insulators of the two cross arms in the direction which is back on to the established tension-resistance tower. According to the special transposition rod for the existing single-circuit tension-resistance tower, a special base transposition rod is newly built close to an existing traditional single-circuittension-resistance tower, and the transposition between conductors is realized by using jumper strings, supporting insulation strings and other facilities. Compared with a traditional scheme, when theline is cut off or changed to connect, only the special transposition rod needs to be removed, and the wiring is adjusted to avoid removal and reconstruction of the transposition tower.

Description

【Technical field】 [0001] The invention relates to the technical field of high-voltage transmission lines, in particular to a special transposition rod suitable for existing single-circuit tension towers. 【Background technique】 [0002] Three-phase unbalance is one of the main factors that determine the arrangement and transposition of conductors. The asymmetric arrangement of the three phases of the transmission line, and the different parameters between phases and relative ground will cause the imbalance of current and voltage in the power system. In order to reduce the asymmetry of voltage and current during normal operation of the power system and limit the impact of transmission lines on communication lines, transposition is often used for transmission lines. [0003] In the actual transmission line transposition project, straight line transposition, tension transposition, suspension transposition and additional bypass jumper transposition are often used, all of which i...

AI Technical Summary

Problems solved by technology

[0003] In the actual transmission line transposition project, straight line transposition, tension transposition, suspension transposition and additional bypass jumper transposition are often used, all of which involve the construction of a new tower with a structure different from the traditional tower, so in the existing During the disconnection and reconnection project of the built line, due to the adjustment of the length of the transmission line and the parameters of the conductor to the ground, etc., there is a problem of dismantling the transposition tower and rebuilding the transposition tower at the newly selected transposition point

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