【摘要】 随着电力系统容量的增大,电压等级的提高,电力系统的稳定运行显得更加重要。绝缘问题是导致电力设备故障和事故的主要原因之一,通过局部放电监测可以提前判断电力设备绝缘状况、发现绝缘缺陷。目前已经有多种局部放电检测方法,光纤传感器具有安全、绝缘和抗电磁干扰等优点,适合安装在设备内部进行在线监测。内置式光纤传感器可准确定位故障源,具有发展前景。文中首先对局部放电的常规测量方法、原理参数及优缺点进行了概述,然后介绍了基于超声波、氢气、荧光和紫外光检测的光纤传感器,详述了基于超声波检测的光纤传感器的研究进展,分析了研制光纤传感器的关键参数和应用问题,最后预期了光纤传感器的发展趋势。更多还原

【Abstract】 The power system stability was emphasized with the increase both of the power capacity and the voltage level. The insulation failure is a main reason resulted in the disaster of the power equipments. The insulation condition of the power equipments could be assessed and some insulation defects could be found previously by partial discharge detection. Among many types of methods applied in partial discharge detection,fiber optic sensors are suitable to be installed inside the power equipments attributed to their characters of insulation,safety,free to electromagnetic interference,and would develop more potentially for the merit of positioning the partial discharge source accurately. In this paper,firstly,the conventional methods,theories and characters about the partial discharge detection were summarized. Next,the fiber optic sensors based on ultrasonic sound,hydrogen,fluorescence and ultraviolet light detection were reviewed. The research progress of the ultrasonic fiber sensors was specified. Then,the key parameters and practical problems of the ultrasonic fiber sensors were analyzed. Finally,the development trend of the fiber optic sensors was anticipated.更多还原