High-voltage direct-current commutation failure control method and device for quickly detecting alternating-current fault

A high-voltage DC, commutation failure technology, applied in the power field, can solve problems such as commutation failure, and achieve the effect of avoiding commutation failure and solving commutation failure.

Active Publication Date: 2021-06-11
CHINA SOUTH POWER GRID ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a HVDC commutation failure control method, device and equipment for rapid detection of AC faults, whi

Method used

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  • High-voltage direct-current commutation failure control method and device for quickly detecting alternating-current fault
  • High-voltage direct-current commutation failure control method and device for quickly detecting alternating-current fault
  • High-voltage direct-current commutation failure control method and device for quickly detecting alternating-current fault

Examples

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Example Embodiment

[0059] Example 1:

[0060] figure 1 A flow chart of a high voltage direct current failure control method for the rapid detection of an AC fault according to the embodiment of the present invention.

[0061] Such as figure 1 As shown, the embodiment of the present invention provides a high voltage direct current failure control method for fast detection of AC failure, and is applied to a high-voltage DC transmission system, including the following steps:

[0062] S10. The three-phase voltage of the AC side bus line according to the high voltage DC transmission system determines the failure phase of the fault;

[0063] S20. Determine the phase offset between each phase voltage between the phase voltage in the high voltage DC transmission system at this time, and determine the maximum phase offset at this time according to the fault phase.

[0064] S30. According to step S20, the phase offset maximum is obtained after the fault is 20ms, and the phase offset maximum value is limited ...

Example Embodiment

[0108] Example 2:

[0109] Figure 9 A frame diagram of a high-voltage direct current transition failure control device for a fast detection of an alternating fault according to an embodiment of the present invention.

[0110] Such as Figure 9As shown, the embodiment of the present invention also provides a high-voltage direct current change failure control device for fast failure, applied to a high voltage DC transmission system, including determining a fault phase module 10, determines the maximum phase offset module 20, solving phase Corner module 30 and control module 40;

[0111] The fault phase module 10 is determined to determine a fault failure phase according to the three-phase voltage of the alternating current side bus line according to the high voltage DC transmission system;

[0112] The maximum phase offset module 20 is determined to determine the phase offset between each phase voltage between each phase voltage in the high voltage DC power transmission system at th...

Example Embodiment

[0129] Example 3:

[0130] Embodiments of the present invention provide a high-voltage direct current failure control device for a fast detection of AC faults, and is applied to high voltage DC transmission systems, including processors, and memory;

[0131] Memory, used to store program code, and transfer program code to the processor;

[0132] The processor is used to perform the above-described AC failure failure control method according to the instructions in the program code.

[0133] It should be noted that the processor is used to perform the steps in the high-voltage direct current change failure control method embodiment of the above-described AC failure according to the instructions in the program code. Alternatively, the processor implements the function of each module / unit in each system / device embodiment as the computer program.

[0134] Exemplary, computer programs can be split into one or more modules / units, one or more modules / units are stored in memory and...

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Abstract

The invention relates to a high-voltage direct-current commutation failure control method, device and equipment for quickly detecting an alternating-current fault, which are applied to a high-voltage direct-current power transmission system. According to the invention, a single-phase fault occurrence phase, namely a fault phase, is determined according to a three-phase voltage of an alternating-current side bus of a high-voltage direct-current power transmission system, the maximum phase offset between a phase voltage and a phase positive sequence voltage at the moment is solved according to the fault phase, a commutation angle with the maximum offset and a synchronous phase angle output by the phase-locked loop of the high-voltage direct-current power transmission system are added to obtain a corrected synchronous phase angle, and the trigger angle of the fault phase is adjusted or corrected by correcting the synchronous phase angle to achieve the effect of correcting the actual trigger angle; and compared with the prior art, the high-voltage direct-current commutation failure control method for quickly detecting the alternating-current fault has the advantages that the fault phase can be quickly judged, a commutation failure result caused by an output error of a phase-locked loop of the high-voltage direct-current power transmission system in an alternating-current fault period is effectively avoided, and the problem of commutation failure of an existing high-voltage direct-current power transmission system is solved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a high-voltage direct current commutation failure control method, device and equipment for rapid detection of alternating current faults. Background technique [0002] AC side fault is one of the important reasons for commutation failure in HVDC transmission system. In the HVDC transmission system, mainly under asymmetrical faults in the HVDC transmission system, the phase shift of the commutation voltage will cause the actual firing angle to shift. When the actual firing angle is greater than the command value, it is likely to cause a commutation margin Insufficient and cause subsequent commutation failure. [0003] Therefore, fast detection of AC faults is of great significance to the stable operation of HVDC transmission systems. How to obtain the offset of the actual firing angle according to the AC fault information and correct the firing angle, so as to avoid subs...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/36G01R31/08
CPCH02J3/001H02J3/36G01R31/086Y04S10/52Y02E60/60
Inventor 傅闯文兆新汪娟娟吴秋媚李欢魏伟
Owner CHINA SOUTH POWER GRID ELECTRIC POWER RES INST
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