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FDIR (fault detection, isolation and reconfiguration)-based fault diagnosis method for power system

A fault diagnosis and power system technology, applied in the field of power systems, can solve problems such as no network reconfiguration processing, no ability to send control commands, etc.

Inactive Publication Date: 2011-11-16
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

After receiving the fault information, the current CC-2000 system does not perform further processing on network reconstruction, nor does it have the function of sending control commands to related control devices

Method used

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  • FDIR (fault detection, isolation and reconfiguration)-based fault diagnosis method for power system
  • FDIR (fault detection, isolation and reconfiguration)-based fault diagnosis method for power system
  • FDIR (fault detection, isolation and reconfiguration)-based fault diagnosis method for power system

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Embodiment Construction

[0025] figure 1 It is a structural schematic diagram of fault type and restoration power supply strategy analysis according to the present invention;

[0026] Faults can be divided into main transformer faults, bus faults, tie line faults, and power plant faults according to equipment types. According to the backup situation, it can be divided into prepared and unprepared. The power supply strategy with backup faults is to firstly use the backup switching device to switch local loads; if the switch is unsuccessful, use other power sources to bring out all or part of the faulty loads through the tie line. The non-prepared fault power supply strategy is to use other power sources to bring out all or part of the load lost due to faults through the tie line.

[0027] 1 Classification of Systematic Faults

[0028] General failure, oscillation failure, frequency collapse, voltage collapse, system breakdown. A general fault is a local fault that does not cause a large-scale power...

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Abstract

The invention belongs to the field of power systems and provides an FDIR (fault detection, isolation and reconfiguration)-based fault diagnosis method for a power system. In the invention, firstly seven faults, namely a main transformer backup fault (B1 type), a main transformer no-backup fault (B2 type), a bus backup fault (M1 type), a bus no-backup fault (M2 type), a tie line backup fault (L1 type), a tie line no-backup fault (L2 type fault) and a power station fault (PP type fault) are defined; a network result analysis reasoning model is provided to judge whether the system is disconnected, and then a fuzzy qualitative reasoning model is provided to judge whether a power grid is instable; and when the two methods cannot be used for judging the system faults in the system, a new method is required for judging the faults of the power grid, therefore a fault diagnosis method based on multi-factor fuzzy qualitative reasoning is provided, wherein the main points of fault diagnosis method based on multi-factor fuzzy qualitative reasoning are as follows: the failure characteristic of each fault has multiple aspects; and the failure characteristics of different faults cannot be completely same.

Description

technical field [0001] The invention belongs to the field of power systems, and relates to a power system fault diagnosis method based on network reconfiguration (FDIR). Background technique [0002] In the operation of modern power systems, large-scale power outages in power systems are issues that require great attention. In recent years, there have been many large-scale power outages due to the stability of the domestic and foreign power systems, which have caused great damage to the national economy and greatly affected the society and people's lives. Ensuring the safe and stable operation of the power system and preventing large-scale power outages is an urgent and important task facing the modern power system. On the other hand, once an accident occurs in the power system, how to take correct and effective measures to minimize the scope of power outage, shorten the time of power outage, and restore power supply as soon as possible becomes an issue that is as important...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 周京阳李强彭国政张涛
Owner CHINA ELECTRIC POWER RES INST
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