Abstract:
The present disclosure relates to a valve unit (200) of a power converter station. The valve unit comprising at least one compartment delimiting an interior space (150) and at least part of at least one power converter (280) arranged within the interior space. A wall (105) of the compartment comprises an at least partially electrically- conductive inner layer (110) facing the interior space and an at least partially electrically-conductive outer layer (120). An insulating material (130) is arranged between the outer layer and the inner layer. The compartment is at least partially filled with a gas including air and includes at least one port (160) for access to the interior space.
Abstract:
The present disclosure relates to a valve arrangement(400) comprising a plurality of valve units (410-450) electrically connected in series. A first valve unit (410) includes a container (130) in which at least one stack of converter cells (120) is arranged. The container is at least partially filled with an electrically insulating gas(115). The valve arrangement further comprises at least one first connector (460) including a first busbar element (461) electrically connecting a cell (421) of the first valve unit at one end of the container to a cell (441) of a second valve unit(420). The first connector is insulated by an electrically insulating gas(465). Further, the valve arrangement comprises at least one second connector (470) including a busbar element (471) for connection of another cell of the first valve unit at another end of the container.
Abstract:
A power converter assembly (100) is disclosed wherein an insulating material is provided e.g. in the form of a layer, cover or coating on a surface of energized elements (200, 250) of the power converter assembly (100). For energized elements (200, 250) of a power converter assembly (100), e.g. a busbar (200) and/or a corona shield (250), the DC corona inception voltage and impulse breakdown strength in air (and/or another fluid) gaps (d_1, d_2) between the energized elements (200, 250) and any object (110) in the surroundings of the power converter assembly (100), such as a wall, floor or ceiling within a building in which the power converter assembly (100) is arranged, may be increased significantly by means of providing an insulating material on a surface of the energized elements (200, 250) compared to employing bare energized elements (200, 250).