Partial discharge detecting method for potting breaker

A partial discharge detection and circuit breaker technology, applied in circuit breaker testing, dielectric strength testing and other directions, can solve problems such as high price

Inactive Publication Date: 2009-03-18
国网吉林省电力有限公司超高压公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In short, although some partial discharge monitoring and diagnostic instruments for circuit breakers have been put into operation at present, they are far from being popularized. forming hot spots

Method used

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  • Partial discharge detecting method for potting breaker
  • Partial discharge detecting method for potting breaker
  • Partial discharge detecting method for potting breaker

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Embodiment Construction

[0055] The detection device includes an ultra-high frequency sensor 1, a filter circuit 2, a detection circuit 3, a gain circuit 4, a first A / D acquisition module 5, a second A / D acquisition module 6, a third A / D acquisition module 7, and an A / D acquisition module. D driving module 8, FIFO module 9, square wave generating module 11, frequency multiplier 12, liquid crystal display 13, microprocessor 10, USB storage module 14 and USB driving module 15 constitute, ultra-high frequency sensor 1 is connected filter circuit 2, The filter circuit 2 is connected with the detection circuit 3, and the detection circuit 3 is connected with the gain circuit 4, and the gain circuit 4 is respectively connected with three parallel A / D acquisition modules (A / D acquisition modules 5, 6, 7), and the microprocessor 10 is connected with A A / D driver module 8, A / D driver module 8 is connected with three A / D acquisition modules in parallel respectively (A / D acquisition module 5,6,7), three A / D acqui...

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Abstract

A tank circuit breaker local discharge detection method relates to the power transmission equipment detection method, which adopts an ultra-high frequency detection method. The tank circuit breaker local discharge detection method is characterized in that a filter circuit limits the signals of a sensor at 0.3 to 3GHz, to avoid the interference of other electric signals, and since the signals are at the nanometer second level, three A / D acquisition modules are adopts to realize sequential delay sample, to realize the sampling frequency of 1.05GHz, and the local discharge level is analyzed by the intensity of received signals. The tank circuit breaker local discharge detection method can quickly and accurately find fault points and reduce the detection range of the fault points, to reduce cost, save manpower, save material power, quickly eliminate fault points, recover power supply and improve the reliability of power supply.

Description

Technical field: [0001] The invention relates to a detection method for power transmission equipment, and further relates to a detection method for partial discharge of tank circuit breakers. Background technique: [0002] The main difficulty in monitoring partial discharge is to eliminate the influence of various disturbances, and how to extract weak discharge pulse signals from strong electromagnetic disturbances. Many methods have been proposed at home and abroad. [0003] 1. External compound electrode method [0004] The SF6 circuit breaker has a metal case and many grounding points, so it is not suitable to extract partial discharge pulse electrical signals from the grounding wire. External complex electrode is one of the methods to extract partial discharge pulse signal. Put an insulating film and metal foil electrodes on the SF6 circuit breaker shell, and the shell and metal foil electrodes form a small capacitance, and the pulse signal caused by partial discharge...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R31/327
Inventor 张世平朱政彭晓洁尹玉芳林乐亭赵殿全韩冬郭启贵李立明刘春
Owner 国网吉林省电力有限公司超高压公司
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