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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, which are applied to HVDC power transmission systems and used to solve the technical problems of commutation failure in existing HVDC power transmission systems

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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

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Embodiment 1

[0060] figure 1 It is a flow chart of the steps of the high-voltage direct current commutation failure control method for rapid detection of alternating current faults described in 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 commutation failure control method for rapid detection of alternating current faults, which is applied to a high-voltage direct current transmission system and includes the following steps:

[0062] S10. Determine the faulty phase where the fault occurs according to the three-phase voltage of the AC side bus of the HVDC power transmission system;

[0063] S20. Determine the phase offset between the phase voltage of each phase and the positive sequence voltage component of the phase voltage in the HVDC power transmission system at this time according to the fault phase, and determine the maximum phase offset;

[0064] S30. According to step S20,...

Embodiment 2

[0109] Figure 9 It is a frame diagram of a high-voltage direct current commutation failure control device for rapid detection of alternating current faults 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 commutation failure control device for fast detection of AC faults, which is applied to high-voltage direct current transmission systems, including a fault phase determination module 10, a maximum phase offset determination module 20, and a phase calculation module. corner module 30 and control module 40;

[0111] Determine the faulty phase module 10, which is used to determine the faulty phase where the fault occurs according to the three-phase voltage of the bus bar on the AC side of the HVDC power transmission system;

[0112] Determine the maximum phase offset module 20, which is used to determine the phase offset between the phase voltage of each...

Embodiment 3

[0130] An embodiment of the present invention provides a high-voltage direct current commutation failure control device for rapid detection of alternating current faults, which is applied to a high-voltage direct current transmission system, including a processor and a memory;

[0131] a memory for storing program codes and transmitting the program codes to the processor;

[0132] The processor is configured to execute the above-mentioned high-voltage direct current commutation failure control method for rapid detection of alternating current faults according to instructions in the program code.

[0133] It should be noted that the processor is configured to execute the steps in the embodiment of the above-mentioned high-voltage DC commutation failure control method for rapid detection of AC faults according to the instructions in the program code. Alternatively, when the processor executes the computer program, the functions of the modules / units in the above system / device emb...

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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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