An insulating tube type bus structure design method

Abstract

The invention provides a method for designing an insulating tube type bus structure. The method comprises the following steps: determining the design requirements of an actual project on voltage and current classes to be met by an insulating tube type bus; comprehensively selecting the pipe diameter of the copper pipe conductor of the insulating pipe type bus according to the current class designrequirement in the practical engineering of the insulating pipe type bus and the applied practical environmental factors; according to a voltage class requirement under a normal working condition required in practical engineering of the insulating tube type bus, carrying out structure design on a main insulating layer based on a maximum field intensity formula, namely determining the thickness ofthe main insulating layer; according to the current class requirement of normal working conditions required in the practical engineering of the insulating tube type bus, carrying out structural designon the copper tube conductor based on an equivalent thermal resistance method, namely determining the wall thickness of the copper tube conductor under a specific tube diameter. Reference is providedfor finished product shaping and further sample test verification of the design scheme of the insulating tube type bus sample, and the technical blank of the industry at present is filled.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution equipment, in particular to a structural design method of an insulating tubular busbar. Background technique [0002] With the rapid development of the national economy, the demand for electricity in the whole society is increasing day by day, the capacity of the main transformer of the substation is constantly increasing, the rated current of the low-voltage incoming line side of the transformer is also increasing, and the structure of the substation is becoming more and more compact. Traditional rectangular busbars, trough busbars and cable busbars are becoming more and more difficult to meet the requirements of bus heating and short-circuit electromotive force technically and structurally. As a new type of power transmission equipment replacing conventional rectangular busbars, insulating tubular busbars have Large size, high mechanical strength, strong electrical in...

AI Technical Summary

Problems solved by technology

[0003] Since there are currently no national or international standards for insulating tubular busbars, and the application of insulating tubular busbars in my country is relatively late, the degree of awareness of them is also quite limited, and is restricted by factors such as technology research and development capabilities, insulating material properties, etc. Constraints. At present, the industry has a wide range of products in China, material selection, structural design and production processes, and product quality and stability.

In recent years, the failure of insulating tubular busbar equipment has spread to dozens of substations in nearly ten provinces such as Hubei, Guangdong, and Xinjiang, which has caused extremely bad effects on the safe and stable operation of the power grid and the reliability of power supply. The basic research on busbars is relatively weak, and there is a lack of necessary guidance in structural design, material selection, production, transportation, installation and operation, etc., especially in structural design, there are serious blind design problems

Under the design requirements of certain voltage and current levels, the current insulating tubular busbar products generally have the problems of thick insulation thickness and large cross-sectional area of ​​current-carrying conductors. On the one hand, it causes a lot of waste of resources; Thickness may lead to less safety and reliability of the product

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