Multi-source information fusing switch cabinet partial discharge detection method
A partial discharge detection and multi-source information fusion technology, applied in the electric power field, can solve problems such as actual switchgear defect simulation, achieve the effects of improving detection efficiency and detection accuracy, reducing complexity, and avoiding the influence of high-frequency noise
Inactive Publication Date: 2018-11-30
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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Moreover, the live detection technology of high-voltage switchgear is still in its infancy, and the application of partial discharge live detection technology of switchgear is still limited to data reading, which is empirical and subjective; theoretical research is still in the stage of simulating ideal defects in tanks, Defect simulation is not carried out for the actual switchgear, and there is a big difference in the application of the research results to the actual switchgear
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[0030] A switchgear partial discharge detection method based on multi-source information fusion, such as figure 1 As shown, including the following steps:
[0031] S1: Set a sensor at the measuring point of the switchgear, and sequentially perform conditioning, filtering, amplification, detection, smoothing and envelope processing on the signal picked up by the sensor;
[0032] S2: measure the signal obtained in step S1;
[0033] S3: Analyze and display the measurement result obtained in step S2.
[0034] among them:
[0035] The sensor is any one of an ultra high frequency (UHF) sensor, an ultrasonic (AE) sensor, a high frequency current (HFCT) sensor, a TEV sensor, a power frequency signal sensor, and a vibration sensor, and the sensor is movable.
[0036] The UHF sensor is a microstrip sensor. The power frequency signal sensor directly extracts the required power frequency signal from the 110V power supply or the PT secondary side of the substation, and after the conditioning, filter...
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The invention discloses a multi-source information fusing switch cabinet partial discharge detection method comprising the following steps of 1, arranging a sensor at a measurement point of a switch cabinet, and sequentially performing conditioning, filtering, amplifying, detection, smoothening and envelope line treatments on a signal picked by the sensor; 2, measuring; and 3, analyzing and displaying. The method provided by the invention separately detects six signals such as ultrahigh frequency, ultrasonic, high-frequency current, TEV, industrial frequency and vibration signals, the sensor can be automatically switched according to requirements, an insulating state in the switch cabinet is subjected to multi-sensing signal comprehensive analysis, mutual corroboration is achieved, the limitation existing in the usage of the single method is avoided, and the detection efficiency and detection accuracy are improved.
Description
Technical field [0001] The invention belongs to the field of electric power technology, and in particular relates to a partial discharge detection method of a switch cabinet with multi-source information fusion. Background technique [0002] High-voltage switchgear is the largest number of switchgear in the power system, and it is responsible for the function of directly supplying power to users. Its operating status is directly related to the reliability of power supply to users. For switchgear, it is inevitable that the insulation will deteriorate due to aging, moisture, mechanical damage, etc. during long-term operation. According to statistics, the number of accidents caused by the insulation deterioration of the switchgear accounted for 68% of the total number of switch accidents and 74% of the total accident capacity. However, the development of state maintenance and the requirements of power supply reliability make it difficult for people to perform periodic power failure...
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IPC IPC(8): G01R31/12
Inventor 邬蓉蓉张炜朱时阳吕泽承苏毅蒋圣超夏小飞杨健
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD