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高频电流传感器是变压器局部放电在线监测的关键部件。本文对高频电流传感器的输出响应进行了理论分析与模拟试验。探讨了影响高频电流传感器灵敏度的若干因素，提出了提高高频电流传感器灵敏度的几种有效方法。理论分析与实测误差＜５％。
High frequency current sensor is the key part of on-line monitoring of transformer partial discharge. In this paper, the output response of high frequency current sensor is analyzed theoretically and simulated. Several factors affecting the sensitivity of high frequency current sensors are discussed, and several effective methods to improve the sensitivity of high frequency current sensors are proposed. Theoretical analysis and measurement error <5%.