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Configuration and method for protecting converter means

A technology of protection structure and converter, which is applied in the direction of emergency protection circuit device, output power conversion device, circuit device, etc., and can solve the problem that the normal operation of the generator structure cannot be restarted.

Active Publication Date: 2005-11-16
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the case of the double feedback slip ring generator configuration described above, there is a problem that normal operation of the generator configuration cannot be resumed after a fault unless the generator is first de-energized

Method used

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  • Configuration and method for protecting converter means
  • Configuration and method for protecting converter means
  • Configuration and method for protecting converter means

Examples

Experimental program
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Embodiment Construction

[0015] figure 1 shows a protection structure for a rotor circuit of a double feedback slip ring generator according to an embodiment of the invention, the protection structure comprising a rotor side converter device INU, a du / dt filter 8 coupled to phases L1 to L3, and Protection circuit 2. For the sake of simplicity, the components configured to measure the electrical quantity, process the measurement results and control the switches are not shown in the figure.

[0016] The rotor-side converter device INU has a DC voltage side and an AC voltage side. The direct voltage side is electrically coupled to the direct voltage intermediate circuit 3 . The AC voltage side is electrically coupled to the rotor of the generator. The rotor-side converter device INU comprises means for rectifying the three-phase voltage of the rotor and for feeding it to the DC voltage intermediate circuit 3, and for inverting the DC voltage of the DC voltage intermediate circuit 3 and for feeding it ...

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PUM

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Abstract

A protection configuration for converter means which comprise a plurality of controllable switches, the protection configuration comprising a protection circuit coupled to the alternating voltage side of the converter means, which protection circuit comprises at least one protective switch configured to short-circuit the alternating voltage side of the converter means, wherein the protection configuration, in predetermined failure situations, is configured to close the protective switch and thus to short-circuit the alternating voltage side of the converter means. After the failure situation has cleared up, the protection configuration is configured to short-circuit the alternating voltage side of the converter means by means of the controllable switches to enhance commutation of the protective switch.

Description

technical field [0001] The invention relates to the protection of converter devices in motor drives against overvoltages and overcurrents. Background technique [0002] Converters are used in various generator and motor drives. One such motor drive including a converter is a double feedback slip-ring generator structure, the rotor circuit of which comprises two converters with a DC voltage intermediate circuit between them. One of these converters is located between the DC voltage intermediate circuit and the rotor, and the other converter is electrically located between the DC voltage intermediate circuit and the network to be supplied. [0003] Such double feedback slip ring generator structures with specific rated speeds are usually configured to operate within a specific speed range with upper and lower limits according to the selected stator and rotor transformation coefficients. The speed range of a double feedback slip ring generator structure with a rated speed of ...

Claims

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Application Information

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IPC IPC(8): H02HH02M1/00
Inventor R・维尔塔宁
Owner ABB (SCHWEIZ) AG