基于小电晕笼的高海拔电晕损失测量系统的研究

High Altitude Corona Loss Measurement System Based on Small Corona Cage

为了研究不同海拔高度下导线起晕电压特性,应用小电晕笼,结合光纤传输技术,基于虚拟仪器技术,研制出一套光纤数字化高海拔电晕损失测量系统。在试验过程中,通过逐渐升高电压使试验导线起晕,应用该系统对其电晕损失进行测量。可以通过在不同的海拔点测量几种导线的电晕损失,作为不同海拔高度导线起晕电压的判断依据,进行导线起晕电压海拔修正方面的研究。试验结果表明,研制的小电晕笼电晕损失测量系统是准确可行的,同时由于中国交流特高压建设途经高海拔地区的特点,也可以考虑应用该系统进一步研究不同气压、温度、湿度等因素对导线电晕损失值的影响,为中国交流特高压输电线路电晕损失规律的进一步研究打下基础。

In order to investigate corona inception voltage characteristic of transmission lines at different altitudes, a fiber-digital high altitude corona loss measurement system was developed on the basis of virtual instrument technology, optical fiber transmission technology, and small corona cage. Experiment was conducted by gradually increasing voltage to induce corona inception on transmission lines, and measuring the corona loss with this system. Experimental result shows that this corona loss measurement system is accurate and feasible. Experiments ought to be conducted at different altitudes to achieve the relation between corona inception voltage and altitude. The measurement system can be used to further study the influences of air pressure, temperature, humidity on corona loss.