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Devices for switching in DC voltage networks

A technology of DC voltage and terminal voltage, applied in the field of separated power DC grid, to achieve the effect of simple structure and operation

Active Publication Date: 2017-03-08
SIEMENS ENERGY GLOBAL GMBH CO & KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corresponding to the prior art, the mechanical switch can therefore advantageously only be implemented as a no-load (current-free) switched-on circuit breaker for this application

Method used

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  • Devices for switching in DC voltage networks
  • Devices for switching in DC voltage networks
  • Devices for switching in DC voltage networks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] FIG. 1 schematically shows a segment 10 of a DC voltage network from spatially extending branches according to the prior art. Transformer 11 generates a high DC voltage on line 21 . In the section shown, the line 21 has a DC switch 12 , on one side of which is a first node 17 and on the other side thereof a node 18 . The DC switch 12 is designed in such a way that by means of short current pulses, the DC circuit breaker is briefly de-energized, whereby the line 21 can be opened.

[0030] After the line 21 has been disconnected, the line inductance 15 , 16 continues to drive the current flow and must ensure energy dissipation. In the construction according to FIG. 1, two separate damping elements 13, 14 are provided for this purpose. The first damping link 13 is connected to a first side of the DC switch 12 at a first node 17 and the second damping link 14 is connected to a second side of the DC switch 12 at a second node 18 . Depending on the previous direction of cu...

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PUM

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Abstract

The invention relates to a device for switching in a DC voltage network, with a switching device for interrupting the current flow in at least one first line of the DC voltage network, wherein the switching device is embedded with a first and a second connection in the in the first line of the DC voltage network; and an attenuation link for energy consumption of the applied terminal voltage, the attenuation link having a first and a second node electrically connected via an attenuation element, with a control from the first node via a first or an uncontrolled switching element to the first junction, and having an electrical connection from the first node to the second junction via the second controlled or uncontrolled switching element.

Description

technical field [0001] The invention relates to a device for switching in a direct voltage network and a method for separating a power direct current network. Background technique [0002] Power electronic systems are becoming more and more important in power supplies requiring very high voltages and powers. Especially for future space-extended and branched high-voltage direct current grids (English: Multiterminal-HVDC), circuit arrangements are required which enable reliable and rapid control of possible disturbance situations and minimize energy losses during normal operation. This requirement arises especially in the case of future DC grids with high voltages and transnational long-distance transmission. [0003] For example, the use of extended offshore wind parks (off-shore wind parks) and large solar power plants in remote desert regions will require spatially extended and branched HVDC grids in the future. In particular, it must be possible to control short circuits...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/59H02H7/26
CPCH02H3/087H02H7/268H01H33/596H02H3/08
Inventor E.加克斯奥拉A.舍恩
Owner SIEMENS ENERGY GLOBAL GMBH CO & KG