Dynamic inversion method and system for power system fault diagnosis

A technology of fault diagnosis and power system, which is applied in fault location, fault detection according to conductor type, measurement of electricity and other directions, and can solve problems such as abnormal operation status and faults

Inactive Publication Date: 2020-06-19
厦门盈盛捷电力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each electrical component and system is usually in normal operation, but there may be faults or abnormal operation

Method used

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  • Dynamic inversion method and system for power system fault diagnosis
  • Dynamic inversion method and system for power system fault diagnosis
  • Dynamic inversion method and system for power system fault diagnosis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The fault recording method is a fault diagnosis method for dispatching power grid based on fault recording information. The fault recorder is used in the power system. When the system fails, it can automatically and accurately record the changes of various electrical quantities in the process before and after the fault. Through the analysis and comparison of these electrical quantities, it can analyze and handle accidents and judge protection. It plays an important role in correct operation and improving the safe operation level of power system.

[0027] The embodiment of the present invention provides an information recording method for expert diagnosis of power system faults, please refer to Figure 1 to Figure 8 .

[0028] Please refer to figure 1 , the method includes:

[0029] Define the wave recording window period, the wave recording window period includes the detection wave recording period of wave recording before the disturbance event occurs, and the distur...

Embodiment 2

[0063] Another embodiment of the present invention provides another information recording method for expert diagnosis of power system faults, please refer to Figure 9 , the method includes:

[0064] Define the wave recording window period, the wave recording window period includes the detection wave recording period of wave recording before the disturbance event occurs, and the disturbance wave recording period of wave recording after the disturbance event occurs;

[0065] The recording window period has a preset duration; a complete period of the detection recording period has a first duration;

[0066] Using the detection recording period to perform dynamic ring recording detection, if no disturbance event is detected in one detection recording period, then enter the next detection recording period;

[0067] During one described detection recording period, if a disturbance event is detected when passing through the second duration, record the disturbance event and the time...

Embodiment 3

[0082] An embodiment of the present invention provides a dynamic inversion method for power system fault diagnosis, including:

[0083] The wave recording step defines the wave recording window period, and the wave recording window period includes the detection wave recording period for wave recording before the disturbance event occurs, and the disturbance wave record period for wave recording after the disturbance event occurs;

[0084] Using the recording window period to record the data information of the detection recording period and the data information of the disturbance recording period;

[0085] Diagnosing and recording steps, after the disturbance event subsides, start the expert diagnosis of the disturbance event, and record the diagnostic reasoning process;

[0086] The graphical dynamic display step is to graphically invert the diagnostic reasoning process according to the time sequence of the occurrence of the disturbance event, and display the expert rules trav...

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Abstract

The invention discloses a dynamic inversion method and system for power system fault diagnosis. The method comprises a wave recording step: defining a wave recording window period which comprises a detection wave recording period for wave recording before a disturbance event happens and a disturbance wave recording period for wave recording after the disturbance event happens and recording the data information of the detection wave recording period and the data information of the disturbance wave recording period by adopting the wave recording window period, a diagnosis and recording step: starting expert diagnosis of the disturbance event after the disturbance event is calm down and recording a diagnosis reasoning process, and a graphical dynamic display step: inverting the diagnosis andreasoning process according to the time sequence of the disturbance events in a graphical manner and displaying expert rules traversed by the diagnosis and reasoning process. According to the method,dynamic inversion of power system fault diagnosis can be realized.

Description

technical field [0001] The invention relates to the field of power system fault diagnosis, in particular to a dynamic inversion method and system for power system fault diagnosis. Background technique [0002] The power system is a system formed by connecting many power stations, substations, distribution stations, users, etc. by transmission and distribution lines. It consists of generators, transformers, busbars, transmission and distribution lines and electrical equipment. Various electrical components and systems are usually in normal operating condition, but there may also be faults or abnormal operating conditions. [0003] Power system failure refers to a state in which the equipment cannot work according to the expected indicators, that is to say, the equipment does not achieve the function it should achieve. Faults include generator set failures, transformer failures, transmission line failures, substation failures, bus fault etc. [0004] As the scale of the pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088
Inventor 袁甄刘以成邱金海
Owner 厦门盈盛捷电力科技有限公司
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