Thyristor converter valve tower for high voltage direct current transmission

Abstract

The invention discloses a thyristor converter valve tower for high voltage direct current transmission. The tower comprises insulating support frames, wherein at least two valve modules and at least two reactor modules are arranged in a parallel manner on the insulating support frames at intervals along vertical direction. The thyristor converter valve tower further comprises a water cooling system used for cooling the valve modules and the reactor modules. The water cooling system comprises a cooling-water main pipe and a cooling-water branch pipe, wherein the cooling-water main pipe is arranged in a winding manner at the outside of the corresponding valve module from top to bottom, the cooling-water branch pipe used for guiding the cooling water to the valve modules and the reactor modules is arranged on the cooling-water main pipe in the direction towards the circular inner side, and gaps are formed between the cooling-water main pipe and the corresponding valve module and reactor module. The tower solves the problem that when a pipe of the water cooling system has water leakage, the thyristor converter valve towel of the prior art brings short circuit damage to bottom components, and reduces the service life of the thyristor converter valve tower.

Description

technical field [0001] The invention relates to the field of electric power system converter valves, in particular to a thyristor converter valve tower for high-voltage direct current transmission. Background technique [0002] The thyristor converter valve tower is composed of several valve modules connected in series. The existing converter valve tower includes multiple valve modules and multiple reactor modules arranged side by side along the longitudinal direction of the insulating support frame. The valve modules are connected in series through a conductive plate. The conductive plate is located in the center of the valve modules. A water cooling system for cooling the valve modules is installed between adjacent valve modules. The water cooling system includes the main cooling water pipeline and the cooling water pipeline. The gap between adjacent valve modules constitutes the maintenance gap. Since the water cooling system is installed between adjacent valve modules, w...

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Problems solved by technology

[0003] The object of the present invention is to provide a thyristor converter valve tower for high-voltage direct current transmission, so as to solve the short-circuit hazard caused by the leakage of the water cooling system pipeline in the existing thyristor converter valve tower, and reduce the risk of thyristors. The problem of the service life of the valve tower of the diverter valve

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