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Design of Electromagnetic Coupling High Frequency Sensor Used in Cable Partial Discharge
Pages: 14-18
Year: Issue:  3
Journal: Electric Wire & Cable

Keyword:  电力电缆局部放电电磁耦合传感器;
Abstract: 电力电缆现已广泛应用于输配电网,其绝缘状况关系到电网的安全运行.现评价电力电缆绝缘状况的主要手段是检测电缆的局部放电.局部放电脉冲放电电流大小一般都在微安级,属于高频小电流信号.首先以罗戈夫斯基线圈为原型,分析了电流传感器结构参数对传感器性能的影响.然后设计制作了高频磁芯电磁线圈、放大电路和滤波电路,并进行仿真和实验研究.验证了设计的线圈频带宽,信噪比高,获得了预期效果.
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