Device for online monitoring of partial discharge of high-voltage electrical equipment
A high-voltage electrical equipment, partial discharge technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problem of reducing the reliability of partial discharge monitoring of high-voltage electrical equipment, the partial discharge status of electrical equipment cannot be monitored, and the discharge signal cannot be detected. To achieve the effect of facilitating popularization and application, filtering out interference noise, and improving signal-to-noise ratio
Inactive Publication Date: 2018-05-11
STATE GRID CORP OF CHINA +1
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Problems solved by technology
However, due to the installation caliber and weak signal (when the traditional high-frequency sensor 03 surrounds the cable, the traveling waves of the inner conductor and the shielding layer are reversed, which will cancel part of the signal), so the traditional high-frequency sensor 03 can only be installed on the cable On the grounding wire 02 of 01; since the traditional cable 01 has only one side grounding, if the other end of the cable head does not have the grounding wire 02, the traditional high-frequency sensor 03 cannot be installed, resulting in the failure to monitor the partial discharge of electrical equipment
Moreover, the bandwidth of the traditional high-frequency sensor 03 is mostly within 20MHz, which is susceptible to noise interference, making partial discharge signals in certain ranges undetectable due to excessive noise; thus reducing the reliability of partial discharge monitoring of high-voltage electrical equipment sex
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[0023] Reference Figure 2 to Figure 5 , The structural features of the partial discharge online monitoring device for high-voltage electrical equipment are detailed as follows:
[0024] An online partial discharge monitoring device for high-voltage electrical equipment, which includes a collector 1 and an industrial computer; the device also includes an ultra-high frequency sensor 2, which is installed on a three-phase output cable 3 of the high-voltage electrical equipment, And the UHF sensor 2 is connected to the industrial computer through the collector 1; wherein, the UHF sensor 2 is in a block shape, and one side of the UHF sensor 2 is in contact with the three-phase output cable 3 and is fixed, The frequency bandwidth of the ultra-high frequency sensor 2 is 30 MHz to 1.2 GHz. The UHF sensor 2 transmits the collected partial discharge signals of high-voltage electrical equipment to the industrial computer via the collector 1.
[0025] Among them, the UHF sensor 2 is in a blo...
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The invention discloses a device for the online monitoring of the partial discharge of high-voltage electrical equipment, and the device comprises a collector and an industrial control computer. The device also comprises an ultrahigh frequency sensor, and the ultrahigh frequency sensor is installed on a three-phase output cable of the high-voltage electrical equipment. Moreover, the ultrahigh frequency sensor is connected with the industrial control computer through the collector. The ultrahigh frequency sensor is shaped like a block, and one side of the ultrahigh frequency sensor makes contact and is fixed with the three-phase output cable. The bandwidth of the ultrahigh frequency sensor is 30MHz-1.2GHz. The device can improve a signal to noise ratio, can easily filter out interference noise generated by a load, and does not affect the measurement of a partial discharge signal. The device can detect a traveling wave magnetic line on a shielding layer. The device can be directly installed on the cable. Compared with a conventional ultrahigh frequency sensor and an installation mode of the conventional ultrahigh frequency sensor and a grounding wire, the device achieves the miniaturization and convenient installation, improves the reliability of the partial discharge monitoring of the high-voltage electrical equipment, is wide in application range, and facilitates the popularization and application.
Description
Technical field [0001] The invention relates to the technical field of partial discharge of high-voltage electrical equipment, in particular to an online monitoring device for partial discharge of high-voltage electrical equipment. Background technique [0002] At present, cables have become one of the blood vessels that transmit electricity and are the most important equipment in power transmission. However, due to burrs or particles on the cable conductor, burrs or particles on the shell, suspended shielding (poor contact), freely moving metal particles, particles on the basin insulator, and internal defects of the basin insulator, electrical equipment is extremely easy Partial discharge occurs. At the same time, various insulation defects, aging, and degradation of insulation performance may also occur during the installation of the cable and long-term live operation, which will then cause partial discharge of electrical equipment. If the partial discharge of electrical equi...
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IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor曹元远陈贵亮汤建华吴应华吕晓健余明军练建安张家海赵守信梅正南骆小军王静顾兵郭文奇董国庆张坤刘杰张松
OwnerSTATE GRID CORP OF CHINA