高压输电线路紫外在线检测系统

介绍了一种基于紫外线检测的放电在线检测系统,该系统克服了过去红外检测、超声波检测和泄漏电流检测法的不足。高压设备放电会产生微弱的紫外线,其中有小部分波长在日盲区(240nm-280nm)内,可避开日光中紫外线的干扰。利用日盲型的紫外传感器,可以通过检测特定波长的紫外线来正确检测高压设备的放电。为了检测紫外检测器的放电检测效果,制造了2种不同的紫外检测器驱动电路板,并比较了输出波形。实验发现,2种电路板都可以对10m内的放电火花正确反应,放电检测能力可通过电源电压调整,并且不受外部环境影响。

An On-line Ultraviolet Detecting System of EHV Transmission Lines

An on-line detecting system based on UV detection is described which is capable of overcoming former disadvantages of infrared, ultrasonic and leaky current detection. When the high-voltage facility discharges, it emits very weak radiation, a small part of which is within the "solar-blind" region (240 nm-280 nm), the part that can escape the UV disturbance. With "solar-blind" UV sensors (working in 185 nm-260 nm), the high-voltage facility discharge can be correctly detected by detecting the special wavelength of ultraviolet radiation. To check the discharge detecting ability of the UV detector, two different drive boards of UV detectors are made with their output waves compared. Experiments show that both can correctly respond to the discharge sparkles within 10 m. The detecting ability can be adjusted by the source voltage without being affected by outside environment. The use of the on-line ultraviolet detecting system is a new method for EHV transmission lines state detection for its high sensitivity, steady performance, good security and broad prospects for wide application.