Method and device for online detection of state of leakage conductor with series gap

A line arrester and series clearance technology, applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve the problem of not being able to monitor the operation status of line arresters and other problems, and achieve the effects of reducing operation and maintenance costs, not easy to age, and long service life.

Active Publication Date: 2014-07-02
JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD +3
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Problems solved by technology

[0004] The invention provides an online detection method and device for the state of a line arrester with a series gap, so as to solve the current problems that the deterioration of the arrester cannot be directly judged and the operating state of the line arrester cannot be monitored online

Method used

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  • Method and device for online detection of state of leakage conductor with series gap
  • Method and device for online detection of state of leakage conductor with series gap
  • Method and device for online detection of state of leakage conductor with series gap

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Embodiment Construction

[0029] The online detection method for the state of the line arrester with series gaps in the present invention comprises the following steps:

[0030] Using the measurement of the action current and duration of the line arrester as the criterion for detecting the state of the main body, detect the power frequency freewheeling value I and the real-time data I ( t), calculate according to the following formula, and obtain the abnormal alarm threshold of the line arrester:

[0031] I ( t ) = [ I ( 1 ) , I ( 1 + Δt ) , . ...

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Abstract

The invention relates to a method and device for online detection of the state of a leakage conductor with a series gap. The method and device are applied to an electric transmission line of an electric system. A conductor action power frequency current collector is connected with a data processor. A counting indicator is respectively connected with the conductor action power frequency current collector and the data processor. The data processor is connected with a failure alarm indicator. The detected action current and continuous actuation time of the leakage conductor with the series gap are adopted to serve as criteria, alarm threshold values are set for the action current and the voltage value of the continuous actuation time, and when the alarm threshold values are reached or exceeded, an alarm is given for state abnormality of the leakage conductor with the series gap, so that the state of the leakage conductor with the series gap is monitored. A passive monitoring method is adopted in the device, the device is simple in structure, state information of the leakage conductor is provided for operation and maintenance personnel in time, and the operation reliability of the leakage conductor with the series gap is improved.

Description

technical field [0001] The patent relates to an online detection method and device for a lightning arrester with a series gap used in a transmission line of a power system. Background technique [0002] The line arrester is mainly used to limit the flashover of tower insulators caused by atmospheric overvoltage. It is one of the important protection equipment to ensure the safe operation of the power system. , Ingress of water and moisture, vulnerable to high current impact, high current impact, these will directly affect the service life of the line arrester, thermal collapse will occur during operation, and even explosion accidents, in order to ensure the normal function of the line arrester, the line arrester needs to be The running status is monitored online. [0003] At present, there are two main types of line arresters without gaps and with series gaps. Conventional detection can be used to effectively monitor the status quo of line arresters without gaps. For those ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 列剑平刘赫王朔张益云王志钢刘桂梅
Owner JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD
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