Power supply device
First Claim
1. A power supply device for a variable rotation speed drive arranged on the seabed, comprising:
- a free-running converter connected on an AC side to a power grid located on land,an inverter having a DC side connected to a DC side of the converter and a load side connected to the variable rotation speed drive, the inverter comprising a plurality of phase modules, with each phase module having an upper and a lower valve branch and each valve branch having at least two series-connected, two-pole subsystems with distributed energy storage devices, the inverter being located on the seabed in immediate vicinity of the variable rotation speed drive,a direct-current cable electrically conductively connecting the DC side of the converter with the DC side of the inverter, andsignal electronics of the inverter located on land,wherein a two-pole subsystem comprises an energy storage capacitor and two turn-off semiconductor switches electrically connected in series at a junction point forming a first connecting terminal of the two-pole subsystem, with the series-connected semiconductor switches being connected electrically in parallel with the energy storage capacitor and a pole of the energy storage capacitor forming a second connecting terminal of the two-pole subsystem.
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Accused Products
Abstract
A power supply device for a variable rotation speed drive includes a free-running converter connected to a land-based power grid, and an inverter connected to the variable rotation speed drive. A direct-current cable electrically connects the DC side of the converter with the DC side of the inverter. The inverter includes a plurality of phase modules having an upper and a lower valve branches with least two series-connected, two-pole subsystems with distributed energy storage devices. The inverter is located on the seabed in immediate vicinity of the variable rotation speed drive. Signal electronics of the inverter is located on land. In this way, the distance between the power supply on land and the drive on the ocean floor can reach several hundred kilometers, with ocean depths of several kilometers.
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Citations
10 Claims
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1. A power supply device for a variable rotation speed drive arranged on the seabed, comprising:
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a free-running converter connected on an AC side to a power grid located on land, an inverter having a DC side connected to a DC side of the converter and a load side connected to the variable rotation speed drive, the inverter comprising a plurality of phase modules, with each phase module having an upper and a lower valve branch and each valve branch having at least two series-connected, two-pole subsystems with distributed energy storage devices, the inverter being located on the seabed in immediate vicinity of the variable rotation speed drive, a direct-current cable electrically conductively connecting the DC side of the converter with the DC side of the inverter, and signal electronics of the inverter located on land, wherein a two-pole subsystem comprises an energy storage capacitor and two turn-off semiconductor switches electrically connected in series at a junction point forming a first connecting terminal of the two-pole subsystem, with the series-connected semiconductor switches being connected electrically in parallel with the energy storage capacitor and a pole of the energy storage capacitor forming a second connecting terminal of the two-pole subsystem. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification