本发明涉及一种双磁芯测量差分泄漏电流传感器设计方法，建立双磁芯测量差分泄漏电流传感器磁感应强度幅值模型；以检测磁场的强度和信噪比SNR为优化目标，建立双磁芯测量差分泄漏电流传感器优化模型：确定满足优化目标的所述双磁芯测量差分泄漏电流传感器磁感应强度幅值模型的解，进而获得双磁芯测量差分泄漏电流传感器的内、外磁芯的几何尺寸。本发明建立了单相绕组进出线差分电流模型，给出了电缆位置、双磁芯尺寸及材料参数、负荷电流、泄漏电流与求解区域内磁感应强度的解析表达式。本发明方法简单直接，能够给出不同电力设备需求下，基于差分测量方式的双磁芯泄漏电流传感器设计方法。

The invention relates to a method of designing a dual core measurement differential leakage current sensor, establishing a model of the magnetic induction intensity amplitude of the dual core measurement differential leakage current sensor; establishing an optimization model of the dual core measurement differential leakage current sensor with the intensity of the detected magnetic field and the signal-to-noise ratio SNR as the optimization objectives: determining the solution of the magnetic induction intensity amplitude model of the dual core measurement differential leakage current sensor that satisfies the optimization objectives The model is then used to obtain the geometrical dimensions of the inner and outer cores of the dual-core differential leakage current sensor. The invention establishes a differential current model for single-phase winding in and out of the line, and gives analytical expressions for the cable position, dual core size and material parameters, load current, leakage current and magnetic induction intensity in the solved region. The method of the present invention is simple and straightforward and can give the design method of the dual core leakage current sensor based on the differential measurement method under different power equipment requirements.