Sliding maintenance channel between layers of HVDC converter valves

Abstract

The invention discloses a sliding maintenance channel between layers of a direct current transmission converter valve, which includes a valve layer; the valve layer includes a first half valve layer and a second half valve layer; one end of the first half valve layer and the second half valve layer Fixed connection through the first insulator; the other end of the first half valve layer and the second half valve layer are fixedly connected through the second insulator; one end of the first half valve layer and the second half valve layer close to the second insulator is passed connected to form an equipotential; and an inspection passage located between the first half-valve layer and the second half-valve layer and capable of moving along the adjacent sides of the first half-valve layer and the second half-valve layer. When the converter valve is overhauled, the overhaul channel 5 can be slid to the position where the valve layer needs to be overhauled and then fixed. In the present invention, an inspection platform is set inside the valve tower, which is convenient for inspection and repair of the internal components of the valve tower; the inspection channel is arranged at the equipotential end of the valve layer, and the requirement for the withstand voltage of the inspection channel is low, which reduces the distance between the two half-layer valves. The horizontal spacing reduces the footprint of the converter valve.

Description

Technical field [0001] The invention relates to the technical field of DC transmission converter valves, and in particular to a sliding type maintenance channel between layers of the DC transmission converter valve. Background technique [0002] The converter valve valve tower is the core component of direct current transmission and consists 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 on each valve layer. There are also radiators, water pipes, drives, damping circuits, reactors and other components that are matched with thyristors. There are many components in the valve tower of the converter valve. In the design process, it is necessary to consider the convenience of later operation, maintenance and overhaul. [0003] At present, there are two main methods for the maintenance of the valve tower of the converter valve. One is to oper...

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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 space of the valve tower; in another structure, each valve layer is also composed of two half-layer valves, but the two half-layer valves The inspection platform is set in the middle of the vertical direction of the two half-layer valves. The width of the maintenance platform of this structure is small and meets the insulation requirements, but it can only facilitate the inspection and maintenance of the two half-layer valves. One of the valves is inconvenient to overhaul the other half-layer valve

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