Flexible direct current transmission suspended type valve tower, assembly method and suspension connection structure thereof

Abstract

The invention relates to a flexible direct current transmission suspended type valve tower, an assembly method and a suspension connection structure thereof. According to the invention, a top layer valve group is suspended on a steel beam of a building through the suspension connection structure; the suspension connection structures are connected between the top layer valve group and an adjacent lower valve group and between every two adjacent lower valve groups; the suspension connection structure comprises an insulator, a U-shaped bolt fastened with one end of the insulator, and an 8-shaped ring hinged with the other end of the insulator, so that all the lower layer valve groups can be sequentially suspended below the top layer valve group, the valve tower forms an integral suspended structure, and the overall shock resistance of the valve tower is further improved; and as the valve tower ensures that all layers of the valve groups are suspended below the steel beam of the building through the 8-shaped rings, the external insulators and the U-shaped bolts, the valve tower can be conveniently and rapidly assembled on site, and the work efficiency of valve tower assembly is improved.

Description

technical field [0001] The invention relates to high-power electric power electronic rectification and inverter devices in the technical field of flexible direct current transmission engineering, in particular to an assembly method of a flexible direct current transmission suspension type converter valve tower, and also relates to the flexible direct current transmission suspension type valve Tower and its suspension connection structure. Background technique [0002] Flexible DC transmission is a new generation of DC transmission technology with the voltage source converter as the core. Compared with AC transmission and conventional DC transmission, flexible DC transmission can flexibly adjust the voltage of the AC system while transmitting energy. Therefore, flexible DC Power transmission has obvious advantages such as good controllability, flexible operation mode, and many applicable occasions. Therefore, under the new form of current power grid construction that is incre...

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Problems solved by technology

[0003] At present, the structure of the flexible DC transmission valve tower at home and abroad is a floor-standing vertical structure. For example, a support connection structure for a high-voltage DC converter valve disclosed in the Chinese utility model patent with application number 200820149242.7. The inner insulators installed between the bottom valve group and the upper valve group adjacent to it and between the upper valve groups adjacent to each other in turn make each upper valve group connected in series above the bottom valve group, and the inner insulator The support components set at both ends are fixedly connected to the opposite valve groups, so as to achieve the effect of fixed support; at the same time, the main water of the cooling system of the valve tower is introduced from the lower part of the valve tower, and the main water pipes are arranged from bottom to top. Branch water pipes are led from the main water pipe to the valve modules on each floor, so this valve tower layout has the following major disadvantages: first, because it is a vertical structure on the ground, the seismic strength is not strong; second, because it is fixed on the ground, the installation The height of the valve is limited, which limits the number of modules, resulting in a small number of valve modules that can be accommodated in the entire valve tower; third, it is relatively difficult to install a single module on site; Check the valve tower downwards, which makes maintenance extremely inconvenient; fifth, due to the limited distance between valve modules, the maintenance space is very narrow, and there is no professional maintenance channel, it is very difficult for maintenance personnel to perform maintenance and replacement; sixth , the shielding cover generally adopts the entire shielding structure, which has a certain impact on ventilation and heat dissipation, and the appearance effect is not beautiful

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