Modular HVDC converter
First Claim
Patent Images
1. A modular DC/AC converter system, comprising:
- a DC input and a DC output for connection in series with at least one additional modular DC/AC converter system in an HVDC network;
AC outputs for connection to an AC load;
a DC/DC converter arranged to convert a part of an HVDC voltage in the HVDC network to a controlled medium voltage direct current voltage, wherein the DC/DC converter comprises a high voltage switch that is connected in series with the DC input, and wherein the DC/DC converter is arranged to provide a controlled DC voltage over a capacitor connected in parallel with the high voltage switch via a diode on an input side; and
a DC/AC converter arranged to convert the controlled medium voltage direct current to a controlled AC voltage for feeding the AC load, wherein the DC/AC converter is connected in parallel with the capacitor.
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Abstract
A modular HVDC converter system including a high voltage direct current network, and at least two DC/AC converters being connected in series to the HVDC network. Each of the DC/AC converters is arranged to provide AC to a separate AC load.
19 Citations
16 Claims
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1. A modular DC/AC converter system, comprising:
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a DC input and a DC output for connection in series with at least one additional modular DC/AC converter system in an HVDC network; AC outputs for connection to an AC load; a DC/DC converter arranged to convert a part of an HVDC voltage in the HVDC network to a controlled medium voltage direct current voltage, wherein the DC/DC converter comprises a high voltage switch that is connected in series with the DC input, and wherein the DC/DC converter is arranged to provide a controlled DC voltage over a capacitor connected in parallel with the high voltage switch via a diode on an input side; and a DC/AC converter arranged to convert the controlled medium voltage direct current to a controlled AC voltage for feeding the AC load, wherein the DC/AC converter is connected in parallel with the capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A converter unit socket, comprising:
mating connection terminals configured to receive one or more modular DC/AC converters comprising a DC input and a DC output for connection in series with at least one additional modular DC/AC converter in an HVDC network, AC outputs for connection to an AC load, a DC/DC converter arranged to convert a part of an HVDC voltage in the HVDC network to a controlled medium voltage direct current voltage, wherein the DC/DC converter comprises a high voltage switch that is connected in series with the DC input, and wherein the DC/DC converter is arranged to provide a controlled DC voltage over a capacitor connected in parallel with the high voltage switch via a diode on an input side, a DC/AC converter arranged to convert the controlled medium voltage direct current to a controlled AC voltage for feeding the AC load, wherein the DC/AC converter is connected in parallel with the capacitor, and an HVDC bypass switch being configured to interconnect the HVDC connections to bypass the DC/AC converter, wherein the DC input and DC output comprise HVDC connections for detachable connection to the HVDC network, wherein the AC outputs comprise AC connections for detachable connection to the AC load, the DC/AC converter further comprising;
an HVDC bypass switch being configured to interconnect the HVDC connections to bypass the DC/AC converter.- View Dependent Claims (12, 13, 14)
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15. A modular HVDC converter system, comprising:
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a HVDC network; and at least two modular DC/AC converters connected in series to the HVDC network, wherein each one of the modular DC/AC converters is arranged to provide AC to a separate AC load, and wherein at least one of the DC/AC converters is a converter comprising a DC input and a DC output for connection in series with at least one additional modular DC/AC converter in the HVDC network, AC outputs for connection to an AC load, a DC/DC converter arranged to convert a part of an HVDC voltage in the HVDC network to a controlled medium voltage direct current voltage, wherein the DC/DC converter comprises a high voltage switch that is connected in series with the DC input, and wherein the DC/DC converter is arranged to provide a controlled DC voltage over a capacitor connected in parallel with the high voltage switch via a diode on an input side, and a DC/AC converter arranged to convert the controlled voltage medium voltage direct current to a controlled AC voltage for feeding the AC load, wherein the DC/AC converter is connected in parallel with the capacitor. - View Dependent Claims (16)
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Specification