í‚800kV ultra-high voltage DC synthesized insulator

Abstract

This invention relates to insulator technique field and to one insulator of +-800kV with direct current, wherein, the umbrella cover uses 110-2-methyl-vinyl ketone as base and adds strengthening agent gas phase white carbon and aluminum hydroxide powder and proper assistant agent and sulfuration agent for mixing; using total injection process to make the silicon glue under high pressure into umbrella cover on the mill surface with continuous distribution with ball heads and ball socket structure ware into one integrated insulator.

Description

Technical field: [0001] The invention relates to the technical field of insulators, in particular to a ±800kV UHV DC composite insulator. Background technique: [0002] Insulators include porcelain insulators, tempered glass insulators, and silicone rubber composite insulators. Porcelain insulators have a long history, and their mechanical and electrical properties meet the requirements of all levels of voltage. Therefore, they have been widely used in AC and DC transmission systems. However, with the increasing air pollution, especially the more serious pollution of the DC system, the weakness of porcelain insulators to rapidly degrade in performance under dirty and humid conditions has gradually been exposed, and line pollution flashover accidents have occurred from time to time. For this reason, people have improved the appearance of porcelain insulators, and designed antifouling products such as bell jar, double umbrella, and triple umbrella, but the application effect o...

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Problems solved by technology

[0005] In addition, porcelain insulators or glass insulators are used, the string length is too long and the weight is too heavy, so that the weight of the tower body and the size of the tower head are greatly increased, which increases the cost of the project. Problems such as the sharp increase in the workload of operation and maintenance such as zero measurement and cleaning

The use of composite insulators can solve the above problems well. However, judging from the actual operation of the external insulation of the ±500kV and ±600kV EHVDC transmission systems that have been put into operation at home and abroad, most of them are not ideal, and the external insulation caused by pollution Insulation accidents are much higher than in the initial design, and some of them need to take a lot of follow-up adjustment and other remedial measures shortly after they are completed and put into operation

[0006] The ±800kV Yunguang UHVDC transmission project currently under construction faces more complex and harsh external insulation conditions. First, the working voltage is higher, with a maximum operating voltage of ±824kV; second, the environment of the line corridor is more complex, Harsh, high altitude, pollution, ice and other unfavorable conditions exist at the same time, which puts forward higher requirements for line insulators

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