Insulator capable of improving external insulation electric strength

Abstract

An insulator which can improve the electrical strength of external insulation relates to a line, a pillar and a bushing insulator with high electrical strength. An upper barrier and a lower barrier are arranged on an upper electrode and a lower electrode of the insulator, a middle barrier is arranged at the outside of an cascading electrode of the insulator string, an upper ring barrier and a lower ring barrier are externally arranged on an upper equalizing ring and a lower equalizing ring of the insulator, and an iron tower barrier and a transmission line barrier are arranged nearby an iron tower and a transmission line close to the insulator. The invention arranges one or multiple barriers, which can improve the strength of external insulation of the insulator, between the two electrodes of the insulator, changes the double-element structure of traditional insulators into a three-element structure, namely consisting of three parts of electrodes, insulators and barriers. The barrier stops moving charge entering from an area to another area, thus easing the area with electrical field distribution in a tense state, obviously enhancing the initial corona voltage and flashover voltage of the insulator, reducing radio interference and the power consumption of high-voltage transmission lines and relieving the deterioration of the insulator.

Description

technical field [0001] The invention relates to a line insulator, a post insulator and a bushing insulator with high electric strength. Background technique [0002] The power system consists of three parts: the generation of electric energy, the transmission of electric energy, and the use of electric energy. The transmission of electric energy requires a complete set of equipment. This set of equipment mainly includes transmission lines, towers, insulators and transformers. The insulator is used to fix the transmission line and maintain a certain insulation distance from the earth. [0003] Insulators can be divided into three main forms by use: line insulators, post insulators and bushing insulators. Line insulators are insulating parts that fix overhead transmission lines, post insulators are insulating parts that support the live parts of high-voltage electrical equipment, and bushing insulators are insulating parts that pass live conductors through the metal shell of ...

AI Technical Summary

Problems solved by technology

[0018] 2. The corona phenomenon in the extremely uneven electric field is not considered

[0019] 3. Consider the flashover voltage of insulators only from the perspective of electrostatic field

However, under high voltage, due to the extremely uneven electric field between the two electrodes of the insulator, corona discharge will occur, so the vicinity of the electrodes of the insulator is filled with moving charges, so the flashover voltage between the two electrodes of the insulator cannot be just Use electrostatic field theory to determine

Due to the above-mentioned static design ideas and monotonous two-element structure, there has been no breakthrough in improving the external insulation strength of insulators for more than one hundred years.

[0020] 4. Did not realize that in most cases, the surface discharge of insulators is long gap discharge

When the gap distance exceeds one meter, the creeping discharge of the insulator is a long gap discharge. At this time, the breakdown process of the gap is related to corona discharge, streamer discharge and pilot discharge. In the design of traditional insulators, there is no distinction between the above Discharges of two different natures

[0021] Fifth, the insulator, the iron tower and the transmission line are not considered as a whole, and then the flashover voltage of the insulator is considered to be increased on the basis of this whole

Images