Three-phase filter equipment including standby filter branch for switchably replacing a removed filter branch for a particular phase
AssigneeAsea Brown Boveri AG
InventorsLennart Carlsson, Tommy Holmgren
Life of this patent
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Abstract
Filter equipment is adapted for connection to an ac power network (N) for damping of current harmonics originating from an installation (TR, SR1, SR2), connected to the network, for power transmission by means of high-voltage direct current. The equipment has a three-phase filter set (F) with three filter branches which are each normally connected to a separate phase of the network via first switching members (BO). A spare filter branch (FR) is arranged as a stand-by for the three filter branches of the filter set (F) and is adapted for connection to an optional phase of the network by means of second switching members (BR).
Claims10
Three-phase filter equipment for connection to a three-phase ac power network (N) for damping current harmonics generated by an installation, connected to the network, for power transmission by means for generating high-voltage direct current comprising:
- a three-phase filter set (F) with three mutually substantially identical filter branches (FA, FB, FC), each of said branches being connected to a separate phase of the network via first switching members (BO), and
- spare filter members (RF) for connection to the network via second switching member (BR),
- the spare filter members comprising a spare filter branch (FR) to serve as a stand-by for the three filter branches (FA, FB, FC) of the filter set (F), and
- said second switching members (BR) connecting the spare filter branch (FR) to an arbitrary phase of the network.
Dependencies are inferred from the claim text.