Pillar composite insulator and calculating method of surface conductivity

Abstract

The invention discloses a pillar composite insulator and a calculating method of surface conductivity so as to improve accuracy of a simulation analysis of insulation performance of the pillar composite insulator and increase the insulation performance of the pillar composite insulator. The pillar composite insulator comprises a pillar main body formed through connecting a plurality of insulating pillars in series, a high voltage fitting located at one end of the pillar main body, a low voltage fitting located at the other end of the pillar main body, a high voltage side insulating sleeve connected to the high voltage fitting, and a low voltage side insulating sleeve connected to the low voltage fitting. The high voltage side insulating sleeve comprises a plurality of high voltage large umbrellas, a plurality of high voltage small umbrellas and a high voltage smooth area. One high voltage small umbrella is arranged between the two adjacent high voltage large umbrellas. An external diameter of each high voltage large umbrella is greater than an external diameter of each high voltage small umbrella. The low voltage side insulating sleeve comprises a plurality of low voltage large umbrellas, a plurality of low voltage small umbrellas and a low voltage smooth area. One low voltage small umbrella is arranged between the two adjacent low voltage large umbrellas. An external diameter of each low voltage large umbrella is greater than an external diameter of each low voltage small umbrella.

Description

technical field [0001] The invention relates to the technical field of electrical components, in particular to a pillar composite insulator and a calculation method for its surface conductivity. Background technique [0002] Currently, power transmission systems usually use high-voltage direct current transmission (HVDC) to transport power from one place to another. In the power transmission system using HVDC transmission mode, a converter station is usually set up to complete the conversion of AC power into DC power or DC power into AC power. In the converter station, post composite insulators are usually set up to support the line, and Increase the creepage distance between the lines and the bottom surface. [0003] Usually, post composite insulators will be affected by strong wind, ice, high temperature, pollution, stress and other aspects. The surface of post composite insulators will accumulate pollution. When the surface of post composite insulators is seriously pollu...

AI Technical Summary

Problems solved by technology

[0004] At present, the surface conductivity of post composite insulators is usually calculated by the voltage applied on the surface of post composite insulators and the corresponding leakage current when the voltage is applied on the surface of post composite insulators, without considering the surface structure characteristics of post composite insulators , that is, the overall shape factor of the post composite insulator is not considered, which leads to poor accuracy of the surface conductivity of the post composite insulator, resulting in poor accuracy of the simulation calculation and analysis of the insulation performance of the post composite insulator, resulting in poor accuracy according to the simulation The results of calculation and analysis show that the insulation performance of post composite insulators formed is poor

Images