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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: 2013-03-06
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 example of an embodiment of a device 1 according to the invention consisting of three phase modules 2a, 2b and 2c is shown. Each phase module 2a, 2b, and 2c is connected to a positive DC voltage line p and to a negative DC voltage line n, so that each phase module 2a, 2b, and 2c has two DC 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 3 3 It is connected to a three-phase AC power grid 5 through a transformer 4. The phase voltages U1, U2, and U3 fall on the phases of the AC power grid 5 respectively, in which grid currents In1, In2, and In3 flow. The phase currents on the AC voltage side of each phase module are represented by I1, I2, and I3. DC current is I d . At each AC voltage connector 3 1 , 3 2 And 3 3 Phase module branches 6p1, 6p2, and 6p3 are formed between the positive DC voltage conductor p and P. At each AC voltage connec...

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PUM

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Abstract

A device (1) has a series circuit of submodules with a power semiconductor circuit and an energy accumulator connected in parallel with the power semiconductor circuit. Each submodule is associated with a short circuit device for shorting the submodule. The short circuit device is a vacuum switching tube. The device is cost-effective and at the same time enables safe bridging of a defective submodule.

Description

Technical field [0001] The present invention relates to a device with a series circuit of sub-modules. The sub-modules have a power semiconductor circuit and an energy storage connected in parallel with the power semiconductor circuit, wherein each sub-module is equipped with a short-circuit device for short-circuiting the sub-modules. Background technique [0002] In voltage intermediate converters in series circuits and converters used for high-voltage direct current transmission in the field of energy distribution and transmission in particular, switch-off power semiconductors are used to convert alternating voltage to direct voltage or vice versa. The voltage level here ranges from tens of kV to hundreds of kV. In order to achieve a relatively high voltage, many 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 connected to each other ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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