Residual magnetic flux can make significant problems in electric power system operation if it is not taken into consideration. The laboratory setup for determining residual magnetic flux value is presented in this paper. The experimental procedure includes only electrical measurements and quantities (voltage and current). Residual magnetic flux value is determined using a low voltage DC source for energization of an unloaded transformer. A simple model of a magnetic core coil or unloaded transformer which consists of a linear resistance in series with a nonlinear inductance is used. Various de-energization magnetic flux values are set before each measurement in order to prove validity of proposed experimental procedure independently of initial condition of magnetic flux. In total, 25 measurements are carried out. Also, the pros and cons of the laboratory setup and experimental procedure are given, as well as plans for future research.

中文翻译：

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使用低压直流电源确定剩余磁通量值的实验室设置

如果不加以考虑，剩余磁通量可能会给电力系统运行带来重大问题。本文介绍了用于确定剩余磁通量值的实验室设置。实验程序仅包括电气测量和数量（电压和电流）。剩余磁通量值是使用低压直流电源为空载变压器供电来确定的。使用磁芯线圈或空载变压器的简单模型，该模型由与非线性电感串联的线性电阻组成。在每次测量之前设置各种断电磁通量值，以独立于磁通量的初始条件证明所提出的实验程序的有效性。总共进行了 25 次测量。还，