Device for alternating-current 750 kV same-tower four-circuit transmission tower

Abstract

The invention discloses a device for an alternating-current 750 kV same-tower four-circuit transmission tower. The device comprises a tower body (6) and two layers of wire crossarms (8) sequentially symmetric on both sides of the tower body from top to bottom, wherein the top of the tower body (6) is symmetrically provided with a ground support (7), each of the wire crossarms (8) includes an uppercircuit wire crossarm (1) and a lower circuit wire crossarm (5), and the wire crossarms (8) hang transmission wires by the V-shaped insulator strings (2); and the transmission wires hung by I-shapedtandem type straight strings (3); the I-shaped tandem type straight strings (3) and the tower body (6) are provided with supporting insulators (4). The device is innovative in layout, achieves a stable, reliable and attractive rod tower design scheme through compact and simple structural design and provids innovative support for engineering practice of 750kV four-circuit lines on the same tower.

Description

technical field [0001] The invention relates to the field of tower design for power system transmission lines, in particular to a device for AC 750kV same-tower four-circuit transmission tower. Background technique [0002] The 750kV power transmission system in Northwest my country is developing rapidly, and the line construction has been gradually networked. Many lines planned to be constructed pass through the tense areas of the power transmission corridor around the city, such as the 750kV transmission project in the southwestern suburbs of Xi'an, the Weinan-Qianxian-Tianshui 750kV project, the Lanzhou East -Pingliang-Qian County 750kV interconnection project, etc. In addition, the land occupation of transmission lines in the Hexi Corridor, an important transmission channel in Northwest China, is also particularly tight. Among the alternative transmission methods, the same-tower multi-circuit transmission technology erects multiple circuits on the same tower to achieve la...

AI Technical Summary

Problems solved by technology

[0003] At present, the 750kV four-circuit line on the same tower is erected on the same tower, the height and width of the tower are significantly increased, and the structure is more complex. The change of the width of the tower and the height of the conductor has a significant impact on the discharge characteristics of the gap between the tower and the tower. The tower height of the structure is too large , so that the overall tower type has increased significantly. It is used in the northwest region, and its insufficient wind resistance performance is also a prominent problem. In addition, its ability to repeat heavy loads such as ice is poor, and there are also deficiencies in technical and economical aspects.

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