A stress calculation method of a VI string

Abstract

The technical scheme provided by the invention is a stress calculation method of a VI string. The method comprises the following steps: a first composite insulator string group and a second composite insulator string form a V shape and are respectively connected to two ends of the V shape on the left and right sides of the upper part of a six-split suspension yoke plate; the middle part of the upper part of the six-split suspension yoke plate is connected with one end of a third composite insulator string group, wherein the third composite insulator string group is of a duplex structure. According to the calculation method disclosed by the invention, the influence on the VI string under different conditions is simulated; under the condition of ensuring that the stress characteristics of the VI string are consistent with those of the VI string on the original power transmission line, the invention can accurately and effectively reflect the stress change of the corresponding VI string, thereby effectively avoiding the safety risk of string breakage and disconnection.

Description

technical field [0001] The invention relates to the field of load testing of power transmission line poles and towers, in particular to a force calculation method of a VI string. Background technique [0002] Power transmission is achieved by using a transformer to boost the power generated by the generator, and then connecting it to the transmission line through circuit breakers and other control equipment. Overhead transmission lines are the main way of electric energy transmission. Overhead transmission lines are composed of line towers, ground wires, insulators, fittings strings (tension strings, suspension strings, jumper strings), pull wires, tower foundations, grounding devices, etc., and are erected on above the ground. [0003] The suspension string is an important part of the overhead transmission line, which is composed of fittings and insulators, and bears the weight of a wire or a split wire. "V" type string and "I" type string are used for the suspension stri...

AI Technical Summary

Problems solved by technology

If the included angle of the "V" type string is too large, the load of the insulator string and the tower window will increase accordingly; if the included angle is too small, a single insulator string will be under pressure when the maximum wind deflection occurs, and in severe cases, the insulator string will be disconnected

[0004] In the strong wind area of ​​37 meters per second and above, the wind deflection angle of the suspension tower of the transmission line suspension tower can reach 70-80 degrees. If the suspension tower adopts V strings, not only the size and weight of the suspension tower of the transmission line will increase, but also the cost performance will be reduced. , and the tonnage of I string and V string insulators is greatly increased

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