罗氏线圈精度性能影响因素分析与改善

Analysis for the Accuracy Influence Factors of Rogowski Coil and Their Improvement

罗氏线圈电流传感器以其线性度好、质量轻等优点在智能电网和电气设备的电流采样中越来越得到重视,但罗氏线圈电流传感器的精度与电磁式电流传感器相比,还有不足。基于理论分析和电磁场仿真,对罗氏线圈本身的精度以及各种结构参数对精度的影响做了深入分析,结合非理想圆环形的异形骨架结构(如矩形、椭圆形),提出精度评价方法,并对罗氏线圈的精度提出了改善措施。

The Rogowski coil current sensor is getting more and more attention in the current sampling of smart grid and electrical equipment because of its good linearity and light weight,but the accuracy of the Rogowski coil current sensor is less than that of the electromagnetic current sensor. Based on the theoretical analysis and electromagnetic field simulation,the accuracy of the Rogowski coil itself and the influence of various structural parameters on the precision were analyzed. Combined with the non-ideal ring shaped skeleton structure（ such as rectangle and ellipse）,the method of the accuracy evaluation and the improvement of the accuracy of the Rogowski coil were proposed.