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Circuit arrangements for electronically controlled DC networks

A series circuit and current direction technology, applied in the field of switching devices, can solve problems such as increased overhead and on-state loss, and achieve the effects of reduced circuit overhead, reliable function, and free cascading.

Active Publication Date: 2013-09-11
SIEMENS ENERGY GLOBAL GMBH CO & KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0035] A further increase in overhead and on-state losses occurs when the electronic switch must be able to be turned off in both current directions (see Figure 3, lower part)

Method used

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  • Circuit arrangements for electronically controlled DC networks
  • Circuit arrangements for electronically controlled DC networks
  • Circuit arrangements for electronically controlled DC networks

Examples

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Embodiment Construction

[0056] Figures 1 to 3 have already been described as belonging to the prior art in the background section of the description.

[0057] Figure 4 A unipolar DC switch is shown, which is used for disconnecting the positive line (P1 relative to P11 ) in a simple, usually grounded DC network on one side (direct voltage or direct current network). This device may be sufficient if the negative wire (N0) is explicitly grounded.

[0058] Figure 5 shown with Figure 4 A similar arrangement, however, has a plurality (here, for example: two) DC switches, which lead to a common busbar (PS).

[0059] Figure 6 shown with Figure 4 Similar arrangement, however with the addition of another DC link with negative polarity and associated switches. In this case, the DC voltage of the positive conductor (UP1 relative to N0) and the DC voltage of the negative conductor (UN2 relative to N0) are usually chosen to be equal in value, the DC voltages being measured in each case relative to a com...

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Abstract

The invention relates to switching and switchover devices for DC networks which make it possible to realize - particularly in the event of faults - rapid and reliable switching processes in combination with good overvoltage damping and low energy losses during normal operation.

Description

technical field [0001] The invention relates to a device for switching in a DC voltage network. [0002] The invention also relates to a method for separating a power DC network. Background technique [0003] Power electronics systems are increasingly important in energy supplies that require very high voltages and powers. Especially for future, spatially extended and branched HVDC grids, it is necessary to be able to reliably and quickly handle possible disturbance situations and to achieve a minimum energy loss during normal operation. These requirements arise especially in future DC networks with high voltages and transnational long-distance transport. For the very high power required until now mainly converters with conventional thyristors and injected direct current (line commutated converters, English: Line Commutated Converters, LCC (line commutated converter)) have been used. However, grid-guided converters do not meet the increasing requirements of the future wit...

Claims

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Application Information

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IPC IPC(8): H03K7/10H02H7/10H02J3/36H01H33/59
CPCH01H33/596H02H3/087H02J3/36Y02E60/60H01J3/36H03K7/10H02H7/10H01H33/59
Inventor R.马夸特
Owner SIEMENS ENERGY GLOBAL GMBH CO & KG
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