Vertically grounding down-leading method for external side of composite material tower and tower thereof

Abstract

The invention relates to a vertically grounding down-leading method for the external side of a composite material tower and a tower thereof, wherein a section of an upper metal cross arm of a grounding downlead is erected on the extension line of a certain side of the ground wire cross arm, and the grounding downlead is vertically led down from the tail end of the metal cross arm. The grounding downlead is linked to the tower by a corresponding lower metal cross arm thereof with a certain distance under a lower phase lead, and finally is grounded along the tower body. If the lower half tower body is a steel tube, the grounding downlead can be directly connected with the steel tube to be grounded through the lower metal cross arm of the grounding downlead. The invention is beneficial to maximally compressing the width of a transmission corridor as well as the lightening protection design, avoids the short circuit of the grounding downlead and the composite material tower body and plays an insulation role of the composite material tower body; furthermore, the unilateral grounding downlead is more material-saving and economical; the structure is simple and convenient, and easy to implement.

Description

technical field [0001] The invention relates to a method for vertically directing the outer side of a composite material pole tower and the pole tower thereof, and belongs to the application field of power transmission technology in electric power systems. Background technique [0002] The tower is an important equipment of the transmission line, and the characteristics of the materials used directly affect the safety, economy and reliability of the line operation. Because steel has the advantages of high strength-to-weight ratio, easy processing and installation, most of the high-voltage grades at home and abroad currently use all-steel towers. However, the all-steel tower also has defects such as high quality (higher steel density) and easy corrosion, so it needs to invest a lot of manpower and material resources in the construction, transportation and maintenance of the tower. With the development of composite material production technology and its manufacturing process,...

AI Technical Summary

Problems solved by technology

[0006] Therefore, in areas with intensive lightning activities, the application of transmission line composite material towers has the problem of grounding (the all-steel tower is a metal conductor, and the ground wire is directly connected to the earth through the tower body, so there is no longer To consider the problem of grounding down), there are many different methods for grounding down, the method of grounding down will directly affect the lightning protection effect of the composite material tower, and also affect the transmission corridor width compression and antifouling of the line. , so the grounding method of the composite material tower is the key technology and difficulty that needs to be solved first in its application

Images