开关柜局部放电综合在线检测装置的研究与应用

采用紫外光技术和超高频技术共同检测开关柜内设备局部放电的发生,研究了一种开关柜局部放电综合检测装置,该装置通过检测局部放电过程中辐射的紫外光脉冲和超高频信号,达到对电气设备局部放电的准确识别,且具有动作时间快、灵敏度高、抗干扰能力强、费用低等优点。研究了紫外脉冲法和超高频法的测量原理,分别给出了紫外部分和超高频部分的信号处理方法以及装置各硬件部分的设计。进行了电容型放电间隙棒-板电晕放电模拟检测试验,证明了该装置能够准确检测不同强度的放电,并能相对反映放电强度的大小。

Research and Application of Online Partial Discharge Detection Device for Switchgear

The UV method and UHF technology are used together to detect partial discharge of electrical equipment in switchgear,and then a kind of partial discharge detection device for switchgear is developed.The device can achieve an accurate identification of partial discharge of electrical equipment by detecting the UV pulse and UHF signals that are radiated in the process of partial discharge,and has many advantages such as fast action,high sensitivity,strong anti-interference ability and low cost,etc.The measuring principle of UV pulse method and UHF technology are studied,the signal processing method of UV part and UHF part are presented respectively,and the hardware design of this device is also presented.The rod-plate corona discharge test is carried out and it proves that the device can detect the discharge of different intensity accurately,and the discharge intensity can be relatively reflected too.