Method for measuring hysteresis loop of transformer core material under harmonic excitation

The invention relates to a method for measuring the hysteresis loop of a transformer core material under harmonic excitation. Because the method gives consideration to the operation condition of a power transformer under the working condition of non-sine excitation, compared with the measurement data obtained by a conventional single-chip measurement system and an Epstein square measurement device under the standard sine excitation, the magnetic flux and hysteresis loop obtained in the mode of harmonic excitation are closer to the magnetic characteristics of the transformer core material under the harmonic excitation during working. The method is more accurate in calculation of three-dimensional finite element simulation analysis of the core material, and has the guide significance for the optimization and design of the structure of the transformer core. 本发明涉及谐波激励下变压器铁心材料磁滞回线的测量方法。由于本发明谐波激励下变压器铁心材料磁滞回线的测量方法考虑到电力变压器在非正弦激励的工况下运行情况，采用谐波激励的形式，所得到的磁通与磁滞回线相较传统的单片测量系统以及爱泼斯坦方圈测量装置在标准正弦激励下得到的测量数据更接近变压器铁心材料在谐波激励下工作时的磁特