基于紫外脉冲法的绝缘子污秽状态监测

为及时监测绝缘子的污秽状态,根据绝缘子污秽程度与放电脉冲的关系和绝缘子放电时紫外脉冲的特性,提出了一种基于紫外脉冲法的绝缘子污秽状态在线监测技术,通过绝缘子放电强度和次数的变化判断绝缘子污秽程度。110kV线路试验的结果表明,在线监测表面放电时的紫外脉冲可监测绝缘子的污秽状态,且不需接触绝缘子,与绝缘子的距离可以达到4m。

Faulty Insulator On-line Monitoring System Based Non-touching UV Pulse Method

Today, methods of insulator contamination detection include leak current method, corona pulse current method etc. But both of the two methods must use a detector contacting with the insulator. Some of the other detecting methods are not on-line monitoring method, so their application is limited. This article proposes a new method of insulator contamination on-line monitoring based on UV pulse detecting. This method relies on the relationship of insulator contamination and discharge pulse. It is making use of the characteristic of UV pulse radiated by the insulator surface discharge. To prove this method, some experiments are done to detect 110 kV line insulators' surface discharges with our on-line monitoring system. the insulator contamination station can be monitored by detecting the UV pulse of insulator surface discharge. This method does not need to contact with the insulator, and it can work at a good distance.