权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

The influence of the air pressure on propagation characteristics of a local discharge occuring on wet polluted surfaces

气压对湿污染表面局部放电传播特性的影响

基本信息

批准号：
09650326
负责人：
MATSUO Hisao
金额：
$ 2.05万
依托单位：
Nagasaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650326/
关键词：
wet pulluted surface surface discharge wet polluted insulator electrolytic solution

项目摘要

An electrolytic solution surface was used to simulate the surface of wet polluted insulators. The solution was set in a Pyrex glass chamber to simulate the surface of wet polluted insulators in transmission lines which pass altitudes. The air pressure in the chamber was changed from 27 to 101 kPa. As the applied voltages, three kinds of impulse voltages, 2/80 mu s simulating a lightning surge, 101800 mu s and 100/2500k mu s simulating a switching surge, were used and were applied between the point and plane electrodes placed on the solution. The resistivity of the solution, the aqueous solution of potassium chloride, was changed from about 170 to 740 OMEGAcm. A local discharge propagates on the solution surface when an impulse voltage is applied to the surface. To observe the propagation velocity of the local discharge and the intensity of a line spectrum of light from the local discharge tip, a monochrometer and photomultipliers were set round the solution surface. The influence of the air pressure and the resistivity of the solution on relations between the propagation velocity of the local discharge and the intensity of a line spectrum of light from the local discharge tip was examined. As a result, it was found that (1) the propagation velocity increases with the intensity of a line spectrum, (2) the propagation velocity for a given intensity of a line spectrum increases with the resistivity of the solution, (3) the influence of the air pressure on the relations is very small, and (4) the influence of the applied voltage waveform on the relations is very small.

采用电解液表面模拟湿污绝缘子表面。该溶液设置在一个PYREX玻璃室中，以模拟输电线路中潮湿污秽绝缘子的表面。气室内的气压从27 kpa变化到101kpa。以S模拟雷电浪涌、101800亩S和101800/2500k亩S模拟开关浪涌三种冲击电压作为施加电压，分别在放置在溶液上的点电极和面电极之间施加冲击电压。氯化钾水溶液的电阻率从约170变化到740OMEGAcm。当脉冲电压施加到溶液表面时，局部放电在溶液表面上传播。为了观察局部放电的传播速度和局部放电尖端的线谱强度，在溶液表面周围设置了单色仪和光电倍增管。研究了气压和溶液的电阻率对局部放电传播速度与局部放电尖端线谱强度之间关系的影响。结果表明：(1)传播速度随线谱强度的增大而增大；(2)给定线谱强度时的传播速度随溶液的电阻率增大而增大；(3)气压对这些关系的影响很小；(4)外加电压波形对这些关系的影响很小。