Converter valve assembly

Abstract

Disclosed herein is a converter valve assembly (20) for a power grid system, comprising two or more equal groups (6a, 6b, 6c) of prismatic converter cells (3a-j), each group (6a, 6b, 6c) arranged in a respective plane (7a, 7b, 7c) of a plurality of parallel planes spaced apart along a horizontal axis (8). The converter cells (3a-j) in a group (6a) are connected in series, and the groups (6a, 6b, 6c) are connected in series along the axis (8). The prismatic converter cells (3a-j) in a group (6a) are arranged such that, during operation of the converter valve assembly (20), a corresponding voltage difference exists between each converter cell (3a-j) in the group (6a) and its corresponding converter cell (3k-t) in the adjacent group (6b) that is spatially closest to the converter cell (3a-j). Therefore, spacing between the groups can be reduced, thereby reducing the overall volume of the converter valve assembly.

Claims

[Claim 1] A converter valve assembly (20) for a power grid system, The system comprises two or more equal groups (6a, 6b, 6c) of prismatic converter cells (3a to ad), where each group (6a, 6b, 6c) is arranged within each of the planes (7a, 7b, 7c) of a plurality of parallel planes spaced apart along the horizontal axis (8). The aforementioned horizontal axis (8) is substantially perpendicular to the action of gravity, The converter cells (3a to j) within group (6a) are connected in series. The aforementioned groups (6a, 6b, 6c) are connected in series along the shaft (8), A converter valve assembly in which the prismatic converter cells (3a to j) in group (6a) are arranged around the axis (8), and are connected sequentially around the axis (8) according to their radial position such that a corresponding voltage difference exists between each converter cell (3a to j) in group (6a) and each corresponding converter cell (3k to t) in the adjacent group (6b) that is spatially closest to each converter cell (3a to j) during the operation of the converter valve assembly (20). [Claim 2] The converter valve assembly according to claim 1, wherein each group is connected in series from the first converter cell to the last converter cell of the group according to a cell arrangement configuration common to all groups, and the last converter cell of the group is connected to the first converter cell of an adjacent group. [Claim 3] The converter valve assembly according to claim 1 or 2, wherein each converter cell in a group is position-aligned with a corresponding converter cell in an adjacent group, and the corresponding converter cells have the same position in the cell arrangement configuration. [Claim 4] The converter valve assembly according to claim 1 or 2, wherein the plurality of parallel planes are spaced apart along the axis by an amount corresponding to the voltage difference between each converter cell in the group and each corresponding converter cell in the adjacent group. [Claim 5] The converter valve assembly according to claim 1 or 2, wherein each group is rigidly mounted on its respective substructure. [Claim 6] The converter valve assembly according to claim 5, wherein each substructure is rigidly connected along the axis, thereby forming a support structure for the converter valve assembly. [Claim 7] The converter valve assembly according to claim 6, wherein the lower structure is rigidly connected by an insulating member. [Claim 8] Further comprising a mounting assembly for the support structure, The converter valve assembly according to claim 6, wherein the mounting assembly comprises a suspension assembly for suspending the support structure from the ceiling, or a stand assembly for raising the support structure from the floor. [Claim 9] The converter valve assembly according to claim 8, wherein the stand assembly comprises a plurality of posts configured to provide electrical insulation from the floor. [Claim 10] Each substructure is attached to its respective one-terrier post, or The converter valve assembly according to claim 8, wherein multiple substructures are mounted via a common mounting structure. [Claim 11] The converter valve assembly according to claim 1 or 2, further comprising a group-by-group shield structure arranged within the aforementioned plane. [Claim 12] The converter valve assembly according to claim 1 or 2, wherein the converter valve assembly has a single structure that constitutes the arm of the converter. [Claim 13] The converter valve assembly according to claim 1 or 2, wherein the converter having the converter valve assembly is a modular multilevel converter configured to supply power to a power grid. [Claim 14] A method (1100) for manufacturing a converter valve assembly according to claim 1 or 2, Two or more equal groups of prismatic converter cells, The process (1110) includes arranging each group so that it is positioned within each of several parallel planes spaced apart along the horizontal axis, The converter cells within the group are connected in series. Each group is connected in series along the aforementioned axis, The arrangement configuration of the prismatic converter cells within a group is configured such that, during the operation of the converter valve assembly, a corresponding voltage difference exists between each converter cell within the group and each corresponding converter cell in the adjacent group that is spatially closest to each converter cell.

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