Cooling pipeline electrode in converter valve

Abstract

A cooling pipeline electrode in a converter valve comprises an electrode body, a connecting sleeve and an electrode base, the electrode body is of a circular flat structure, an arc groove used for containing the electrode body is formed in the top of the connecting sleeve, and the arc groove and the electrode body are concentrically arranged. During installation, the electrode body is arranged inthe arc groove and is fixed with the electrode base through the connecting sleeve. According to the cooling pipeline electrode in the converter valve, the contact area with fluid is increased; the section of the cooling pipeline electrode is in a flat oval shape, so that the impact force of the movement of the fluid in the pipeline on the electrode body contact can be reduced; and meanwhile the electric field distribution characteristic is effectively improved. When the cooling pipeline electrode is applied in a cooling pipeline in an extra-high voltage direct-current converter valve device, formation and spreading of sediments on the metal electrode can be effectively reduced, the thickness and speed of formation of sediments on unit areas of the electrode and a metal body are powerfullyreduced, and the operation utilization rate of the converter valve device is increased.

Description

technical field [0001] The invention belongs to the technical field of ultra-high voltage direct current transmission, and in particular relates to a cooling pipeline electrode in a converter valve. Background technique [0002] With the national strategic development and planning, domestic UHV DC transmission technology has developed rapidly, and more and more DC transmission projects at home and abroad have been put into operation, effectively utilizing long-distance, large-capacity transmission projects, offshore wind power, and large-scale wind farms. , Back-to-back asynchronous networking and other aspects have shown unique advantages, realizing the optimal and balanced allocation of power resources in the east and west, and improving the efficiency of comprehensive air pollution control. [0003] With the vigorous development of UHV DC transmission technology in the country, DC transmission converter valve equipment based on high-power thyristors or IGBTs as the core p...

AI Technical Summary

Problems solved by technology

At present, most of the electrode bodies used in converter valve equipment at home and abroad generally have only one or more straight cylindrical electrode needles inserted on the electrode base, which has the problem of bad electric field distribution and easy scaling. Therefore, in order to ensure effective Good potential control effect and effective suppression of deposit formation speed, increase the contact surface area between the electrode and the circulating water flow, slow down the impact force of the fluid movement in the pipeline on the electrode body, increase the surface area of ​​the electrode body itself, and increase the contact area with the fluid, thereby To prolong the actual service life of the electrode and prolong the descaling period of the electrode surface deposits, it is necessary to improve and optimize the structure of the electrode

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