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Revision method and apparatus of work parameters of fuse

A technology of working parameters and fuses, applied in parameter calibration/setting, emergency protection circuit devices, electrical components, etc., can solve problems such as inability to select fuses, excessive protection margin of fuses, etc., and achieve increased selection The effect of range, accurate selection and cost reduction

Active Publication Date: 2016-05-18
BEIJING ETECHWIN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem that the fuse protection margin is too large or the appropriate fuse cannot be selected

Method used

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  • Revision method and apparatus of work parameters of fuse
  • Revision method and apparatus of work parameters of fuse
  • Revision method and apparatus of work parameters of fuse

Examples

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Embodiment 1

[0032] In wind power converters, fuses are used to protect higher value diodes, and their design selection plays an important role in converter design. The revision method of the working parameters of the fuse of the present invention "refines" the selection process of the fuse, fully considers the actual operating parameters such as temperature, and optimizes the fuse by analyzing and calculating the characteristics of the diode and the fuse at different currents and temperatures. It improves the design method of fuses, realizes more accurate fuse selection, and avoids the disadvantages of large errors in traditional selection only based on data sheets.

[0033] Figure 8 It is a schematic flowchart of an embodiment of the method for revising the operating parameters of the fuse in the present invention. Such as Figure 8 As shown, the revision method of the fuse working parameters in this embodiment may specifically include:

[0034] S201: The step of obtaining the short-...

Embodiment 2

[0042] Figure 9 It is a structural schematic diagram of an embodiment of the device for revising the working parameters of the fuse of the present invention. Such as Figure 9 As shown, the device for revising the working parameters of the fuse in this embodiment can be implemented as Figure 8 A method for revising operating parameters of a fuse in the illustrated embodiment.

[0043] Specifically, the device for modifying the working parameters of the fuse in this embodiment may include: a short-circuit current value obtaining module 301 for obtaining different short-circuit current values ​​under different voltage cut-in angles; a diode damage time-short-circuit current curve obtaining module 302 for obtaining To obtain the damage time-short-circuit current curve of the diode at different temperatures; the fuse time-short-circuit current curve obtaining module 303 is used to obtain the fuse-time-short-circuit current curve of the fuse; the experiment module 304 is used t...

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Abstract

The invention provides a revision method and an apparatus of work parameters of a fuse. The method includes: a short circuit current value obtaining step: obtaining the short circuit current values of different voltage entry angles; a diode breakdown time-short circuit current curve obtaining step: obtaining a breakdown time-short circuit current curve at different temperatures; a fuse fusing time-short circuit current curve obtaining step: obtaining a fusing time-short circuit current curve; an experiment step: performing a fuse short circuit protection experiment, realizing different short circuit current values via the change of voltage entry angles, and detecting the breakdown times of the diode with different short circuit current values and at different temperatures and the fusing times of the fuse with different short circuit current values; and a correction step: correcting the breakdown time-short circuit current curve of the diode at different temperatures and the fusing time-short circuit current curve of the fuse according to experiment data. Therefore, accurate type selection of the fuses can be realized, and the cost of the fuses can be reduced to some extent.

Description

technical field [0001] The invention relates to a method and a device for revising working parameters of a fuse for protecting a power circuit, in particular to a method and a device for revising working parameters of a fuse for converter diode protection in the wind power field. Background technique [0002] In power circuits, fuses play an important role as a protection element for short-circuit faults. The safe operation of power circuits depends largely on the selection of fuses, so proper selection of fuses is a prerequisite for safe operation of the circuit system. The selection of existing fuses is only based on the fixed current, fixed temperature I 2 t, to select the fuse. Causes the problem that the fuse protection margin is too large or the appropriate fuse cannot be selected. Contents of the invention [0003] The invention provides a method and device for revising the working parameters of the fuse, which is suitable for the design of the fuse that needs to...

Claims

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Application Information

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IPC IPC(8): H02H7/20
CPCH02H3/006H02H7/20
Inventor 黄晓波张国驹姜鑫
Owner BEIJING ETECHWIN ELECTRIC
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