Importance

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Abstract

Power converters are disclosed. One power electronic converter for connecting AC and DC electrical networks and transferring power therebetween includes a converter limb extending between two DC terminals and having limb portions separated by an AC terminal. Each limb portion includes a chain-link converter including at least one rationalized module that has first and second sets of series-connected current flow control elements connected in parallel with at least one energy storage device. The current flow control elements and energy storage device(s) in each rationalized module combine to selectively provide a voltage source to control the configuration of an AC voltage at the AC terminal. The converter further includes a controller to selectively control the switching of the current flow control elements to simultaneously switch both limb portions into circuit to form a current circulation path including the converter limb and the DC electrical network.

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First Claim