VOLTAGE SOURCE CONVERTER COMPRISING A CHAIN-LINK CONVERTER
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United States of America Patent
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Issued Date -
Dec 10, 2015
app pub date -
Oct 16, 2013
filing date -
Jan 11, 2013
priority date (Note) -
Abandoned
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Abstract
A voltage source converter comprises: at least two converter limbs, each converter limb extending between DC terminals and having limb portions separated by an AC terminal. Each limb portion includes at least one switching element and at least one chain-link converter including series-connected modules. Each module includes at least one switching element and at least one energy storage device that combine to selectively provide a voltage source. The chain-link converter(s) form a branch to interconnect two AC terminals. Each limb portion is switchable to switch the corresponding chain-link converter(s) into and out of circuit with a respective DC terminal. The chain-link converter(s) is switchable to control the configuration of an AC voltage at each corresponding AC terminal. The converter further includes a control unit that coordinates the switching of the limb portions and the chain-link converter(s) to cause transfer of real power between the AC and DC electrical networks.
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