新型SF6电流互感器绝缘在线监测系统

摘要

本文介绍了一种新型SF6充气式电流互感器绝缘状态在线监测系统,在保证了SF6气体不发生泄漏,可回收的基础上,设计了独特的气路结构,并采用红外传感器技术和电化学原理实现对SF6电流互感器中SF6气体纯度以及故障分解产物SO2含量的连续监测.相比现有的SF6绝缘监测装置,该系统通过监测SF6气体纯度信息直接判断电流互感器的绝缘状况,同时通过检测分解产物SO2的含量可以为判断具体故障和潜在内部故障提供科学依据,最终对SF6电流互感器主绝缘劣化状态做出准确判断和预测.通过监测结果,验证了该系统的可行性.%Based on ensuring no leakage and recycling of SF6; this paper presents a new type insulation on-line monitoring system for SF6 current transformer. According to the technology of infrared thermal sensor and electrochemical principle; this system can monitor continuously the purity of SF6 and detect the SO2 content of decomposition. Compared with other insulation monitoring devices of SF6 ; it can not only evaluate directly the insulation status of transformers by monitoring the purity of SF6; but provide scientific basis for analysis of specific failure and potential internal fault. Therefore; the judge and predict for main insulation deterioration situation of current transformer can be realized. The result of experiment verifies the feasibility of the system.