基于紫外成像法的气压对棒–板间隙交流放电影响的实验研究

电气工程学报 ›› 2015, Vol. 10 ›› Issue (5): 68-74.

基于紫外成像法的气压对棒–板间隙交流放电影响的实验研究

王胜辉,刘鹏,冯宏恩,刘云鹏

华北电力大学河北省输变电设备安全防御重点实验室保定 071003

收稿日期:2015-01-14 出版日期:2015-05-25 发布日期:2015-05-25
作者简介:王胜辉男 1977年生,博士,讲师,主要从事电气设备在线监测与故障诊断方面的研究工作。|刘鹏女 1987年生,硕士研究生,主要从事高压设备放电的非接触检测和评估方面的研究。
基金资助:
国家自然科学基金(51207055);“特高压工程技术(昆明、广州)国家工程实验室”开放基金(NEL201508)

Experimental Study on the Influence of Air Pressure to Rod-Plane Gap Discharge Based on Ultraviolet Imaging Method

Wang Shenghui,Liu Peng,Feng Hongen,Liu YunPeng

Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense North China Electric Power University Baoding 071003 China

Received:2015-01-14 Online:2015-05-25 Published:2015-05-25

摘要/Abstract

摘要：

为研究气压对极不均匀电场中空气间隙放电的影响特性,论文在气压可调的金属罐内以棒-板间隙模型为研究对象,采用紫外成像法研究了不同棒-板间隙距离、气压和电压下该模型从起晕到击穿整个过程的放电特性。研究表明：在气压不高于标准大气压下,棒-板间距为10cm、15cm和20cm的起晕电压和棒-板间距为15cm和20cm的击穿电压与气压近似呈正比线性关系,而间距为10cm和4.6cm间隙的击穿电压随气压的增大呈现非线性特性。同一棒-板间距下,放电电离发光区域随气压的增大而减小,近似满足幂函数的关系,其指数在[-3.8, -2.7]范围内。本文最后还对比分析了云南（高海拔）和保定（平原）地区棒-板间隙的放电,实测结果与实验结果一致。

关键词: 气压, 棒-板间隙, 紫外成像法, 起晕电压, 击穿电压, 电离发光区域

Abstract:

To study the influence of air pressure to the discharge of air gap in severe non-uiform electric field, in a metal tank, whose air pressure is adjustable, the rod-plate gap model discharge characteristics of the whole process from corona onset to the breakdown under different rod-plate gap distances, air pressure and voltages were studied with ultraviolet imager. Studies shows that when the air pressure is no more than standard atmospheric pressure, the corona onset voltage of 10cm, 15cm and 20cm gaps and breakdown voltage of 15cm and 20cm gaps approximately meet linear relationship to the air pressure, but the breakdown voltage of 10cm and 4.6cm gaps appear nonlinear properties, and at the same rod-plate gap distance, discharge ionizing light emitting region decreases with the pressure increasing, and approximately meet the relationship of power function, the indexes are in range of [-3.8, -2.7], Finally, the discharge in Yunnan (high altitude) and Baoding (plains) region with a same rod-plate gap discharge were analyzed, and the measured results are consistent with experimental results.

Key words: Air pressure, rod-plate gap, ultraviolet imaging, onset voltage, breakdown voltage, ionizing light emitting region

中图分类号:

TM855

王胜辉, 刘鹏, 冯宏恩, 刘云鹏. 基于紫外成像法的气压对棒–板间隙交流放电影响的实验研究[J]. 电气工程学报, 2015, 10(5): 68-74.

Wang Shenghui, Liu Peng, Feng Hongen, Liu YunPeng. Experimental Study on the Influence of Air Pressure to Rod-Plane Gap Discharge Based on Ultraviolet Imaging Method[J]. Journal of Electrical Engineering, 2015, 10(5): 68-74.

图/表 11

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间距/cm	气压区间/kPa	电压区间/kV
10	70~101.5	21~45
15	48.5~101.5	21~39
20	48.5~101.5	27~36

地区	起晕电压/kV		击穿电压/kV		光斑面积/像素 (30kV)
地区	现场值	预测值	现场值	预测值	现场值	预测值
保定	20	19.57	69.5	69.43	72	73
云南	16	16.87	60.5	58.74	171	181

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