一种用于电缆局放检测的高频电流传感器的设计

局部放电是造成交联聚乙烯(Cross Linked Polyethylene,XLPE)电缆绝缘劣化的主要原因。检测局部放电信号能减少电力绝缘击穿事故发生,提高供电可靠性。高频电流法是现场局放带电检测最为常用的方法之一。为了提高高频电流法检测准确度与效率,研制了一款新型高频电流传感器,介绍了传感器检测原理与结构设计。试验测试表明,传感器带宽、灵敏度以及抗干扰性能优秀,能够有效提取高频脉冲放电信号。

Design of a High-frequency Current Sensor Used for Detection of Cable Partial Discharge

Partial discharge is the main cause for insulation deterioration of cross-linked polyethylene cable.Through detection of partial discharge signal,electric power breakdowns could be reduced and power supply reliability could be improved.High-frequency current method is one of the most commonly used methods for field live detection of partial discharge.A new high-frequency current sensor was developed to improve the accuracy and efficiency of high-frequency current detection.The principle and structure design of sensor detection is introduced in this paper.Test results have shown that the proposed sensor could have excellent performance in terms of bandwidth,sensitivity and anti-jamming and could effectively extract high-frequency pulse discharge signal.