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Device for protecting converter modules

A sub-module and short-circuit device technology, applied in emergency protection devices, output power conversion devices, protection switches, etc., can solve the problems of high cost and achieve high dielectric insulation capacity and small contact travel

Active Publication Date: 2010-03-10
SIEMENS ENERGY GLOBAL GMBH CO & KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this known device is expensive due to the additionally used power semiconductors

Method used

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  • Device for protecting converter modules
  • Device for protecting converter modules
  • Device for protecting converter modules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] figure 1 An exemplary embodiment of the device 1 according to the invention is shown by way of example, consisting of three phase modules 2a, 2b and 2c. Each phase module 2a, 2b and 2c is connected to a positive direct voltage line p and to a negative direct voltage line n, so that each phase module 2a, 2b and 2c has two direct voltage connections p and n. In addition, an AC voltage connection 3 is provided for each phase module 2a, 2b and 2c 1 、3 2 and 3 3 . AC voltage connector 3 1 、3 2 and 33 It is connected to the three-phase AC grid 5 through the transformer 4 . The phase voltages U1 , U2 and U3 drop in each case on the phases of the alternating current network 5 , through which the network currents In1 , In2 and In3 flow. The phase currents on the AC voltage side of each phase module are denoted by I1 , I2 and I3 . DC current is I d . On each AC voltage connector 3 1 、3 2 and 3 3 Phase module branches 6p1 , 6p2 and 6p3 are formed with the positive DC ...

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PUM

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Abstract

In order to provide a device (1) comprising a series connection of submodules (7), which are provided with a power semiconductor circuit (T1, T2, D1, D2) and an energy accumulator (8) connected in parallel to the power semiconductor circuit (T1, T2, D1, D2), each submodule (7) being associated with a short circuit device for shorting the submodule, the device being cost-effective and at the same time enabling safe bridging of a defective submodule (7), the invention proposes that the short circuit device is a vacuum switching tube (100).

Description

technical field [0001] The invention relates to an arrangement having a series circuit of submodules with power semiconductor circuits and energy stores connected in parallel to the power semiconductor circuits, wherein each submodule is equipped with a short-circuit device for short-circuiting the submodules. Background technique [0002] In voltage intermediate converters in series circuits and especially in converters for high-voltage direct current transmission in the field of energy distribution and transmission, power semiconductors which can be switched off are used to convert an alternating voltage into a direct voltage or vice versa. At this voltage level ranges from tens of kV to hundreds of kV. In order to achieve relatively high voltages, a number of semiconductor modules equipped with power semiconductor chips are connected in series due to the limited withstand voltage of power semiconductors. Different semiconductor modules can also be interconnected to form ...

Claims

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Application Information

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IPC IPC(8): H01H79/00H01H33/66H02M7/49
CPCH01H79/00H01H33/666H02M1/32H02M2001/325H02M2007/4835H02M1/325H02M7/4835
Inventor 乔格·多恩沃纳·哈特曼
Owner SIEMENS ENERGY GLOBAL GMBH CO & KG