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Partial discharge sensor

A partial discharge and sensor technology, applied in the direction of instruments, measuring electricity, measuring electrical variables, etc., can solve the problem of easy to generate false alarms, and achieve the effect of being insensitive to electromagnetic interference.

Pending Publication Date: 2021-10-29
镇江友森智能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the above-mentioned electromagnetic interference exists nearby, it is easy to generate false positives.

Method used

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Examples

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Effect test

Embodiment 1

[0025] See attached figure 1 , including sensor probe (1), shell (2), photoelectric conversion (3), processor (6), RS-485 communication (7), interface (8), inner cavity (12), it is characterized in that, the The tail of the sensing probe (1) passes through the hole of the housing (2) to meet or approach the photoelectric converter (3), the photoelectric converter (3) has a photosensitive surface (11), and the sensing probe (1) senses The light generated by the partial discharge is transmitted through the tail of the sensing probe (1) and irradiated on the photosensitive surface (11) of the photoelectric conversion (3), and the electrical signal output by the photoelectric conversion (3) is connected to the processor ( 6), the processor (6) processes the received electrical signal, and sends the result through the RS-485 communication (7), and the RS-485 communication (7) is connected to the interface (8), and the interface (8 ) is a cable, and the photoelectric conversion (3)...

Embodiment 2

[0029] The partial discharge sensor in this embodiment is different from that in Embodiment 1 in that: it also includes a low-pass filter, which is located between the photoelectric conversion and the processor, and the low-pass cut-off frequency of the low-pass filter is 500Hz. This function is mainly used to obtain the low-frequency information of the signal to judge whether there are other abnormalities, such as whether there is flame burning.

Embodiment 3

[0031] The partial discharge sensor in this embodiment is different from that in Embodiment 1 in that: it also includes a powerful magnet, which is located at the bottom of the housing, and the powerful magnet is a tetragonal crystal formed by neodymium, iron, and boron . The advantage of this example is that it is directly adsorbed on the cabinet wall without the need for screw holes during construction, which improves the convenience of construction.

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Abstract

The invention discloses a partial discharge sensor which comprises a sensing probe, a shell, a photoelectric converter, a processor, an RS-485 communication device, an interface and an inner cavity, the tail of the sensing probe penetrates through a hole of the shell to be connected with or close to the photoelectric converter, the photoelectric converter is provided with a light sensing surface, the sensing probe senses light generated by partial discharge, and the light is transmitted out through the tail of the sensing probe; and the photoelectric conversion device is arranged in the inner cavity and irradiates a photosensitive surface of the photoelectric conversion device, an electric signal output by the photoelectric conversion device is connected to the processor, the processor processes the received electric signal and sends out a result through the RS-485 communication device, the RS-485 communication device is connected with the interface, the interface is a cable or a connector, and the photoelectric conversion device, the processor and the RS-485 communication device are all located in the inner cavity. A passive sensing probe and optical fiber transmission signals are adopted, electromagnetic interference is not sensitive, and the problem that an existing product is prone to false alarm under the electromagnetic interference condition is solved.

Description

technical field [0001] The invention relates to the technical field of partial discharge fault and electrical fire monitoring in power systems, in particular to a partial discharge sensor. Background technique [0002] Switch cabinets, high-voltage switches, high-voltage cable joints, dry-type transformers, gas-insulated transformers, gas-insulated transmission lines, gas-insulated busbars and other high-voltage power equipment, use methods such as increasing the safety distance and filling insulating gas to ensure the insulation state between high-voltage conductors . However, foreign matter and protruding defects inside the high-voltage equipment will change the distribution of the uniform field inside the high-voltage equipment, cause localized discharge, and further deteriorate the insulation performance of the defective part. If not handled in time, insulation breakdown may occur Accidents are caused. Therefore, a partial discharge sensor is needed to detect and send i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 栗娟
Owner 镇江友森智能科技有限公司
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