The peak value and various harmonics' amplitudes of exciting currents or first winding currents increase with DC current linearly. 試驗發現，變壓器直流偏磁將導致空載電流畸變，空載電流峰值及各次諧波隨直流電流的增加直線上升。
This function is sometimes called active and reactive current compensation or line drop compensation. 此功能有時稱為有功和無功電流補償或線路壓降補償。
The fundamental reactive current component is evaluated by the reconstruction of the phase difference between the fundamental component and the power source voltage. 通過重構基波分量與電源電壓之間的相位差，求得了信號中的基波無功電流分量。
The peak value and various harmonics' amplitudes of exciting currents or first winding currents increase with DC current linearly. 試驗發現，變壓器直流偏磁將導致空載電流畸變，空載電流峰值及各次諧波隨直流電流的增加直線上升。
