Positioning device and positioning method for fault detection of local discharge

A partial discharge detection and partial discharge technology, which is applied in the direction of testing circuits and dielectric strength, can solve the problems of poor anti-interference ability and inaccurate positioning, meet the requirements of partial discharge detection, improve anti-interference ability, and facilitate The effect of the operation

Inactive Publication Date: 2010-02-10
优能电气(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects of poor anti-interference ability and inability to accurately locate partial discharge fault detection in the prior art, the purpose of the present invention is to provide a partial discharge fault detection and positioning device that can improve anti-interference ability and can accurately locate. It also provides a method for locating partial discharge faults using the detection and locating device of the present invention

Method used

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  • Positioning device and positioning method for fault detection of local discharge
  • Positioning device and positioning method for fault detection of local discharge
  • Positioning device and positioning method for fault detection of local discharge

Examples

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example 1

[0056] like figure 2 , Figure 5 As shown, there is a defect 23 in the gas insulated switch 22 of the ground 20, thereby generating a partial discharge. Through the partial discharge detection locator 14, a vibrating contact type resonant ultrasonic sensor 25 combined with a miniaturized narrow-band antenna 21 is used. Mobile resonant ultrasonic sensor 25 with a moving range of 1m 2 ; By observing the variation of the ultrasonic signal amplitude displayed by the partial discharge detection locator 14, move the resonant type ultrasonic sensor 25 up and down, left and right, such as finding that the ultrasonic signal amplitude becomes smaller when it is far away from a certain point, and the ultrasonic signal amplitude increases when approaching , indicating the presence of partial discharge. Stop when the signal amplitude displayed by the partial discharge detection locator 14 is the largest and the distance is the smallest, and the detected position at this time is the rel...

Embodiment 2

[0059] like figure 2 , Image 6 As shown, there is a fault point 33 in the buried cable 30 and a discharge fault occurs. The combination of the resonant contact ultrasonic sensor 31 and the small narrowband antenna 35 is used to connect the resonant contact ultrasonic sensor 31 and the small narrowband antenna 35 respectively. Insert the resonant ultrasonic sensor socket 15 and the electromagnetic sensor socket 11 of the partial discharge detection and locator 14 to detect and locate the partial discharge fault on the buried cable 30. First put the vibration contact type resonant ultrasonic sensor 31 on the ground surface 32, cooperate with the small narrow-band antenna 35, the operator 18 moves the resonant ultrasonic sensor 31 along the direction of the cable by operating the partial discharge detection locator 14, if found in a certain The amplitude of the ultrasonic signal decreases when the point is far away, and increases when it is close to the point, indicating the e...

Embodiment 3

[0061] like figure 2 , Figure 7 As shown, there are overhead lines 46 and 47 in the pole tower 40, wherein there is a corona discharge in the air on the line 46, and the combination of the acoustic emission type resonant ultrasonic sensor 41 and the small narrow-band antenna 45 is used to control the overhead line of the power equipment along the air. Corona discharge faults and insulators are used to detect and locate partial discharge faults. During detection, the acoustic emission type resonant ultrasonic sensor 41 and the small narrowband antenna 45 are respectively connected to the resonant ultrasonic sensor socket 15 and the electromagnetic sensor socket 11 of the partial discharge detection and locator 14 at the same time, and the operator 18 detects and locates the partial discharge by moving Instrument 14, it can be seen that the amplitude of the partial discharge signal displayed on it changes with the change of the distance. For example, if it is found that near ...

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Abstract

The invention discloses a positioning device and a positioning method for fault detection of local discharge, and the positioning device comprises two sensors, a local discharge detection positionfinder and a computer, wherein, the two sensors consist of an electromagnetic sensor and a resonant ultrasonic sensor; the local discharge detection positionfinder is internally provided with double-signal paths in parallel; the positioning device also comprises a data acquisition card and a liquid crystal display (LCD) which are connected with the output ends of the double-signal paths; one path of the double-signal paths is an electromagnetic path connected with a peripheral electromagnetic sensor, while the other path thereof is an ultrasonic channel connected with a peripheral resonant ultrasonic sensor; one path is displayed by the LCD connected with the acquisition card, and the other path is sent to a peripheral computer through data wires after signal received by the electromagnetic path and the ultrasonic path is processed by the acquisition card. The test method is simple and flexible, has easy operation and strong anti-interference performance, overcomes the defect of single detection method for local discharge in the prior art, and can realize accurate detection and position on local discharge fault points in power equipment.

Description

technical field [0001] The invention relates to a partial discharge fault detection and positioning device and a positioning method, in particular to a partial discharge fault detection and positioning device and a positioning method for power equipment, belonging to the technical field of power equipment partial discharge fault detection and positioning. Background technique [0002] At present, the known partial discharge detectors are composed of sensors, amplifiers, filters, signal acquisition equipment and computers connected in series. By receiving electrical or non-electrical signals generated by partial discharge, the received signals are filtered and amplified, and finally transmitted to Analysis and processing are carried out on the computer, so as to complete the detection of partial discharge and the determination of the location of partial discharge. [0003] Since partial discharge in power equipment produces various signals, including electrical signals and no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/14
Inventor 张乔根朱太云周宏
Owner 优能电气(天津)有限公司
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