Configuration method of high-voltage transmission line insulator

Abstract

The invention relates to a configuration method of a high-voltage transmission line insulator, belonging to the technical field of transmission line insulation design of a power system. The method comprises the steps as follows: firstly, a mapping table is established according to the existing experience or the corresponding standards, thereby estimating the string length of the insulator to be selected, wherein the insulator is needed in line design; the insulator to be configured is chosen according to the string length of the insulator in the mapping table and mechanical requirements; for a specific insulator to be configured, the salt deposit density of the operated insulator is calculated and the pollution flashover voltage is acquired by the data of the pollution test; in consideration of revisions of a plurality of affection factors, the withstand voltage of the insulator to be configured is calculated and the string length of the insulator is determined according to the targetvoltage of the line to be designed; and finally, the string length and the string length threshold in the mapping table are calibrated, thereby determining final insulation configuration result. The method realizes two functions of insulator type selecting and size configuration and directly uses the results of the pollution test to calculate, so as to ensure the precision and reliability of insulator configuration to meet the requirements on line pollution outer insulation design.

Description

technical field [0001] The invention relates to a configuration method of high-voltage transmission line insulators, in particular to a configuration method of ultra-high-voltage transmission line insulators under dirty conditions, and belongs to the technical field of power system transmission line insulation design. Background technique [0002] The configuration of transmission line insulators, selecting appropriate insulators and determining sufficient insulation size, that is, pollution external insulation design is an important part of transmission line construction. The configuration results must ensure that line insulators can withstand flashover caused by surface pollution and moisture, so that the line can be Long-term reliable operation. With the improvement of the voltage level, the engineering requirements for the design of the dirty outer insulation are also getting higher and higher. UHV transmission lines often span large distances, and there are differences...

AI Technical Summary

Problems solved by technology

The creepage ratio method requires consideration of the effective coefficient of the creepage point distance of the insulator, but there are not many studies on this at present, so the accuracy of the design results of the creepage ratio method is not high

There is an equivalence problem between man-made pollution and natural pollution in the law of pollution resistance

Each of these methods has its own advantages and disadvantages. Simply using one method for actual engineering design may result in insufficient or excessive insulation margin, resulting in flashover risk or engineering waste.

Images