Partial discharge multi-source fusion detection system and method for high-voltage switch cabinet

A high-voltage switch cabinet, partial discharge technology, applied in the field of partial discharge multi-source fusion detection system, can solve the problem that the execution efficiency needs to be improved, etc.

Pending Publication Date: 2020-10-30
STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] With the advent of the big data era, a large number of high-speed real-time data streams are becoming more and more common. Big data analysis technologies (such as distributed computing, memory computing and s

Method used

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  • Partial discharge multi-source fusion detection system and method for high-voltage switch cabinet
  • Partial discharge multi-source fusion detection system and method for high-voltage switch cabinet
  • Partial discharge multi-source fusion detection system and method for high-voltage switch cabinet

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Embodiment 1

[0034] Such as figure 1 As shown, this embodiment provides a partial discharge multi-source fusion detection system for a high-voltage switchgear, including a sensor component, a signal acquisition and processing module connected to the sensor component, and a computer connected to the signal acquisition and processing module Terminal 8.

[0035] The sensor assembly includes a UHF sensor 2 , an AE sensor 3 , and a TEV sensor 4 .

[0036] The signal acquisition and processing module includes an amplifier 5 , a filter 6 connected to the amplifier 5 , and a USB data acquisition card 7 connected to the filter 6 .

[0037] The amplifier realizes signal amplification, the filter filters out low-frequency and high-frequency interference, and improves the detected signal-to-noise ratio. The USB data acquisition card can realize multi-channel synchronous data acquisition, and is connected to the computer terminal through the USB interface to realize data acquisition. The power supply...

Embodiment 2

[0040] This embodiment provides a multi-source fusion detection method for partial discharge of a high-voltage switchgear. The AE sensor is arranged on the inner surface of the door of the high-voltage switchgear to detect partial discharge of the high-voltage switchgear; the UHF sensor is arranged on the door of the high-voltage switchgear. The outer surface of the high-voltage switchgear is used to detect the partial discharge of the high-voltage switchgear; the TEV sensor is arranged inside the high-voltage switchgear to detect the partial discharge of the high-voltage switchgear.

[0041] The method of ultrasonic detection of partial discharge by detecting the ultrasonic signal generated by partial discharge is called ultrasonic detection of partial discharge. The noise of the switchgear is mainly concentrated in the low frequency field, mostly below 20kHz. The detection of ultrasonic partial discharge should avoid the interference frequency range and focus on high frequenc...

Embodiment 3

[0044] This embodiment provides a partial discharge multi-source fusion detection method for high-voltage switchgear, which is an improvement on the basis of embodiment 2:

[0045] The detection of the AE sensor includes the following steps:

[0046] (1) When four typical discharge models of cone-plate, needle-plate, ball-plate and column-plate are selected, as well as five non-discharge models, the AE sensor is used to continuously collect data on the discharge signal, and the collection time is 120s;

[0047] (2) Taking 60ms as the long time window, cut out 2000 pieces of data in equal parts, and a total of 10,000 pieces of sample data in five cases;

[0048] (3) Randomly select 20% of the sample data as the test set, and 80% of the sample data as the training set, and build a convolutional neural network database.

[0049] Four typical power generation models of cone-plate, needle-plate, ball-plate and column-plate are selected to carry out the partial discharge detection ...

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Abstract

The invention provides a partial discharge multi-source fusion detection system and method for a high-voltage switch cabinet, and belongs to the technical field of electric power overhaul. The systemcomprises a sensor assembly, a signal collection and processing module connected with the sensor assembly, and a computer terminal connected with the signal collection and processing module; the sensor assembly comprises a UHF sensor, an AE sensor and a TEV sensor; the signal collection and processing module comprises an amplifier, a filter connected with the amplifier, and a USB data acquisitioncard connected with the filter. According to the system and method of the invention, ultrahigh frequency, ultrasonic wave and TEV partial discharge detection technologies are fused, the system and method have the advantages of high sensitivity, strong anti-interference capability and the like, can realize accurate positioning of discharge faults, obtain quantitative data, predict and accurately position internal discharge in advance, reduce the workload of an inspection department, and improve the working efficiency.

Description

technical field [0001] The invention relates to the technical field of electric power maintenance, in particular to a partial discharge multi-source fusion detection system and method for a high-voltage switchgear. Background technique [0002] High-voltage switchgear is a very important electrical equipment in the power system. At present, the complete sets of 10kV and 35kV metal-enclosed switchgear have been widely used in various substations in the power system. In the long-term operation of electrical equipment, there must be insulation degradation caused by electrical, thermal, chemical and other factors. According to the statistics of 6-10kV switchgear accidents in the national power system from 1998 to 2002, the faults caused by the insulation and current-carrying parts accounted for 40.2% of the total, and the accidents caused by the flashover of the insulation part accounted for 79% of the total number of insulation accidents. In recent years, switchgear burnout an...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1227G01R31/1209
Inventor 孙建华赵明赵悦冰刘磊梁继元程祥学史红伟
Owner STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY
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