Direct-current transmission converter valve and inter-layer maintenance platform thereof

Abstract

The invention discloses an inter-layer maintenance platform of a direct-current transmission converter valve. The direct-current transmission converter valve is composed of at least two valve layers which are staked to each other along a vertical direction; each valve layer is composed of two semi-layer valves which are arranged side by side in a horizontal direction; the maintenance platform is arranged between the two semi-layer valves; and the body of the maintenance platform is suspended on the frame of the two semi-layer valves. The invention also discloses a direct-current transmission converter valve.

Description

technical field [0001] The invention relates to the technical field of DC power transmission converter valves, in particular to a DC power transmission converter valve and an interlayer maintenance platform thereof. Background technique [0002] The valve tower of the converter valve is the core component of the direct current transmission. It is composed of multiple thyristors in series. The valve tower usually adopts a structure in which multiple valve layers are stacked sequentially from top to bottom, and the thyristors are evenly distributed in each valve layer. The thyristors are also matched with radiators, water pipes, drives, damping circuits, reactors and other components. The number of components in the valve tower of the converter valve is large, and the convenience of later operation and maintenance and inspection needs to be considered during the design process. [0003] At present, there are mainly two ways to overhaul the valve tower of the converter valve. O...

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Problems solved by technology

[0003] At present, there are mainly two ways to overhaul the valve tower of the converter valve. One is to operate directly on the lift car, and there is no maintenance platform inside the valve tower. This method can only be used for maintenance of the peripheral equipment of the valve tower. If a fault occurs, it will be difficult to maintain; another way is to set up an inspection platform inside the valve tower. It consists of half-layer valves arranged side by side in the direction. The two half-layer valves are fixedly connected together. An inspection platform is set between the half-layer valves. The inspection platform and the valve layer are located on the same horizontal plane. In order to meet the insulation requirements, the maintenance platform must be wide enough, which will inevitably increase the floor area of ​​the valve tower, and the maintenance platform is parallel to the valve layer, which is not convenient for the maintenance personnel to maintain the device; in another structure, each A valve layer is also composed of two half-layer valves, but the two half-layer valves are arranged in a staggered layer and are not on the same horizontal plane. The maintenance platform is set at the middle position in the vertical direction of the two half-layer valves. The maintenance platform of this structure The width is small and meets the insulation requirements, but only one of the two half-layer valves can be easily inspected, and the other half-layer valve is not easy to inspect and repair

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