To study the influence of environmental factors such as temperature, humidity, wind speed, and air pressure on the detection of corona discharge using ultraviolet imaging, the rod‐plate gap model was used, and the ultraviolet video signals of AC discharge under different environmental conditions were recorded by CoroCAM504 ultraviolet imager, and the environmental factors affecting UV discharge from electrical equipment were analyzed. The experimental results show that the area of the discharge spot increases nonlinearly with temperature. The area of the discharge spot decreases with increasing humidity, and a power‐law relationship governs this behavior. At a humidity of 40 to 90%, the power index varies from 1.6 to 2.6. Wind speed weakens coronal discharge: when the wind speed is 12 m/s and the voltage is 50 kV the discharge spot area is reduced by 76.7% compared with that in still conditions. Air pressure has a significant effect on ultraviolet imaging, and field tests also show that discharge at high altitudes is stronger than that at lower altitude. Based on the above experimental research, normalization of spot area by correction coefficient method is proposed. The correction error is less than 20%, which offers guidance to engineering practice. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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基于UV成像的棒板间隙电晕放电环境影响因素研究

为了研究温度，湿度，风速和气压等环境因素对使用紫外线成像检测电晕放电的影响，我们使用了棒板间隙模型，并研究了在不同环境条件下交流放电的紫外线视频信号用CoroCAM504紫外线成像仪记录了这些气体，并分析了影响电气设备紫外线释放的环境因素。实验结果表明，放电点的面积随温度非线性增加。放电点的面积随湿度的增加而减小，并且幂律关系决定了这种行为。在40％到90％的湿度下，功率指数从1.6到2.6变化。风速减弱冠状放电：当风速为12 m / s且电压为50 kV时，放电点面积比静止状态下减少76.7％。气压对紫外线成像有重大影响，现场测试还表明，高海拔地区的放电强度要强于低海拔地区的放电强度。在以上实验研究的基础上，提出了用修正系数法对斑点面积进行归一化的方法。校正误差小于20％，可为工程实践提供指导。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。提出了用修正系数法对斑点面积进行归一化的方法。校正误差小于20％，可为工程实践提供指导。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。提出了用修正系数法对斑点面积进行归一化的方法。校正误差小于20％，可为工程实践提供指导。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。