局部放电在线检测系统电流传感器特性的研究

局部放电在线检测是在设备运行条件下进行的，检测元件不能直接接入检测设备的回路中，只能利用电磁耦合的方法，以隔开低频高压。本文采用电流传感器来实现对变压器局部放电脉冲电流的检测。分析了电流传感器的频率特性及各参数对它的影响，通过实验进行了分析和验证，得出了磁心罗戈夫斯型电流传感器的设计方法。

RESEARCH OF CURRENT TRANSDUCER CHARACTERISTIC IN PD ON-LINE MEASUREMENT SYSTEM

Partial discharge (PD) on-line measurement is processed during the period of the equipment running. Detecting component cannot be directly putted into the loop of detected equipment. To block off low-frequency high voltage only the electromagnetism coupling method can be used. In this paper the current transducer is adopted to detect the PD pulse current of the transformer, and the frequency characteristic of current transducer and the resulting effect put on by each parameter are analyzed. At last the design method of magnetic corn Rogowski Coil current transducer is gained by the analysis and verification of the experiment.