Metal oxide arrester multiple-lightning-current withstand test method

A test method and lightning current technology, applied in the direction of instruments, measuring electricity, measuring electrical variables, etc., can solve the problems of inability to simulate the accumulation of electric power and thermal effects, impact aging damage, failure to achieve overvoltage protection, etc. workable effect

Active Publication Date: 2014-04-23
SHANGHAI JIAO TONG UNIV +1
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  • Description
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  • Application Information

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Problems solved by technology

These test methods can only simulate a single pulse, and the minimum time interval for multiple repeated tests is 10s, which is much longer than the time interval of actual multiple lightning strikes, and cannot simulate the accumulation of electrodynamic and thermal effects caused by actual multiple lightning strikes
Due to the cumulative effect of the impact current on the zinc oxide non-linear

Method used

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  • Metal oxide arrester multiple-lightning-current withstand test method

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Embodiment Construction

[0017] Below in conjunction with embodiment and accompanying drawing the method of the present invention is described in detail, present embodiment implements according to the technical scheme of the present invention, has provided detailed implementation and specific process, but protection scope of the present invention is not limited to this embodiment.

[0018] Example figure 1 ,

[0019] The multiple lightning current withstand test method of metal oxide arrester of the present invention, described method comprises the following steps:

[0020] Step 1: Record that the ambient air pressure in the laboratory is 102kPa, the temperature is 25°C, and the humidity is 9g / m3. Select 20 pieces of valves for 10kV zinc oxide line arrester, and the nominal discharge current of the 8 / 20μs impulse current wave is 5kA. The diameter is 35mm, the height is 30mm, and the 2ms square wave flow capacity is 150A.

[0021] Step 2: Using the method in the standard "GB11032-2010 AC Gapless Meta...

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Abstract

Provided is a metal oxide arrester multiple-lightning-current withstand test method which comprises the steps of selecting a valve plate and recording a test environment, recording the performances of the valve plate before test, determining parameters for multiple lightning current applying, recording the test process in which multiple lightning current impulse is applied to the valve plate, measuring the performances of the valve plate after test and evaluating the capability of the valve plate to withstand multiple lightning current. According to the metal oxide arrester multiple-lightning-current withstand test method provided by the invention, the situation of an arrester under the action of actual lightning current including first lightning current, subsequent lightning current and immediate long-time lightning current can be simulated, and the test method is feasible.

Description

technical field [0001] The invention relates to a metal oxide arrester test technology, in particular to a metal oxide arrester multiple lightning current withstand test method. Background technique [0002] Surge arresters are effective lightning protection measures widely used on distribution lines. Due to their large number of installations and wide distribution range, their life evaluation, test methods, and operation and maintenance programs have always been the key points in the operation and maintenance, status evaluation, and asset management of power systems at home and abroad. problems faced. Operation experience at home and abroad shows that lightning strike itself is the most important cause of lightning arrester failures in distribution lines, and the characteristics of arresters under actual lightning current impact are key issues in terms of operating state evaluation, test methods, protection effects, and coordination methods. Lightning observations at home ...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 陈坚廖一帆江安烽王国利傅正财孙伟
Owner SHANGHAI JIAO TONG UNIV
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