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为研究影响输变电设备电晕放电检测的气压、温度、湿度三大环境因素,以棒-板间隙为研究对象,在人工模拟气候罐内借助于Coro CAM504紫外成像仪,研究了不同环境因素和棒-板间隙距离下的起晕电压和放电电离区域大小的变化特性,并对其相互之间的关系进行了归纳和拟合,通过在平原和高原地区进行放电实际测试,对比验证了研究结果的准确性。研究结果表明:气压、绝对湿度对起晕电压值影响明显,温度对起晕电压的影响不明显;起晕电压随气压、绝对湿度的增加而增加,2者具有近似的幂函数关系;同时棒-板间隙距离增加时,起晕电压则略有增加。放电电离区域的大小随气压、绝对湿度增加而降低,光斑面积与气压、绝对湿度之间近似满足幂函数关系。
In order to study the three environmental factors that affect the pressure, temperature and humidity of corona discharge test of power transmission and transformation equipment, taking the rod-plate gap as the research object, the Coro CAM504 UV imager was used in artificial simulated climate tank to study the effects of different environmental factors And the characteristics of the corona voltage and the size of the ionization discharge area under the distance between the bar and the plate, and the relationship between them was summarized and fitted. The discharge test was carried out in the plain and plateau regions, The accuracy of the results. The results show that air pressure and absolute humidity have obvious influence on the voltage of corona, and the influence of temperature on the corona voltage is insignificant. The voltage of corona onset increases with the increase of air pressure and absolute humidity. The two have approximate power function. - As the plate gap increases, the corona voltage increases slightly. The size of discharge ionization area decreases with the increase of air pressure and absolute humidity. The relationship between the spot area and air pressure and absolute humidity approximately satisfies the power function.