Extra-high voltage flexible direct current transmission support type valve tower

Abstract

Disclosed is an extra-high voltage flexible direct current transmission support type valve tower. The extra-high voltage flexible direct current transmission support type valve tower comprises a supporting base, multiple layers of valve assemblies and a maintenance structure, wherein the supporting base is provided with two sets of supporting structures which are arranged side by side in a front-back mode; each supporting structure is provided with at least two layers of supporting frames which are vertically stacked and connected; a radiation strip structure is arranged between the two adjacent layers of supporting frames; the supporting frame comprises two outer side supporting bodies and at least one inner side supporting body, wherein the two outer side supporting bodies and the at least one inner side supporting body are oppositely arranged left and right; the front end and the back end of the at least one inner side supporting body and the front end and the back end of the outerside supporting body are connected with a pull rod structure separately; the multiple layers of valve assemblies are connected with the supporting base in a stacked and connected mode up and down; each layer of valve assembly is provided with two groups of valve section bodies which are arranged side by side in a front-back manner, and two groups of valve section bodies of each layer of valve assembly are located on the two groups of supporting structures respectively; each valve section body is composed of a plurality of valve sections which are arranged side by side; and the maintenance structure is connected between two groups of valve section bodies of each layer of valve assemblies. The extra-high voltage flexible direct current transmission support type valve tower has a stable supporting structure and is high in anti-seismic capacity and convenient for daily maintenance and maintenance.

Description

technical field [0001] The invention relates to the technical field of power transmission, in particular to a supporting valve tower for UHV flexible DC transmission. Background technique [0002] The flexible direct current transmission technology is a new type of direct current transmission technology based on fully controlled devices, pulse width modulation technology and voltage source converter. Compared with foreign countries, domestic flexible DC transmission technology research and engineering application started late, but developed rapidly. It has developed from ±35kV / 20MW Shanghai Nanhui Flexible DC Project to ±350kV / 1000MW with the highest voltage level and the largest transmission capacity in the world. Rousey back-to-back soft straight works. In the future, the voltage level of flexible DC transmission technology will develop towards UHV (usually above ±800kV DC), and the transmission capacity will also move towards a higher level. The full-bridge topology conv...

AI Technical Summary

Problems solved by technology

Changes in the weight and height of the valve tower will bring great challenges to the overall high-intensity seismic capacity and daily maintenance of the valve tower

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