基于电磁感应能力的Rogowski线圈结构参数选取研究

以Rogowski线圈的电流测量原理为基础,建立了骨架截面为圆形和矩形时线圈结构参数影响其电磁感应能力的相关数学模型,并进行了仿真研究。结果表明,圆形线圈的互感系数相对误差较小,有利于获取更准确的电流值;增大线圈的骨架直径和中心直径,能使线圈的感应信号增强,但必须控制两者的比例值。最后,提出了线圈结构参数的选用方法,并结合实例对研究结果的有效性进行了验证,为快速、合理地选用Rogowski线圈提供有力的指导。

Study on the Selection of Structure Parameters of Rogowski CoilBased on Electromagnetic Induction Ability

On the basis of current measuring principle of Rogowski coil, relevant mathematical models were set up, which were about electromagnetic induction ability of coils affected by their structure parameters when their frame sections were circular and rectangular. Then, simulation studies were carried out, results showed that relative error of mutual inductance of the circular coil was smaller, which was helpful for obtaining more accurate current values, Increasing the frame diameter and center diameter of coil could enhance induction signal of the coil, but the ratio values of the two must be under controlled. Finally, selection method of structure parameters of Rogowski coil were put forward, and the validity of these studying results were verified combining with instances, which provided powerful guidance for selecting Rogowski coil rapidly and reasonably.