Transformer winding parameter identification method based on high-frequency excitation

• Main Authors: LIN JIANQIN, LI ZHI, YANG HANPENG, YU SHAOFENG, YIN ZHONGDONG, YUAN QULONG, XIANG SHENG, CAI XINHUA, ZHENG ZHIYAO, XIA YUETING, WANG YAWEI, GAO YIBO
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention provides a transformer winding parameter identification method based on high-frequency excitation. Firstly, the principle that transformer winding materials are distinguished through the high-frequency current skin effect is analyzed theoretically, and then specific testing steps are provided. In order to reduce the influence of winding coil inductance on a measurement result, firstly, an equivalent inductance value of a transformer loop is obtained through actual testing according to a transformer equivalent circuit, and then an equivalent inductance value under a frequency to be measured is calculated according to an inductance value under a fundamental frequency and is compensated. And finally, the transformer winding material is distinguished by comparing the resistance parameters of the test transformer and the standard transformer. 本发明提供了一种基于高频激励的变压器绕组参数辨识方法。首先从理论上分析了利用高频电流趋肤效应进行变压器绕组材质区分的原理，之后提出了具体的测试步骤。其中，为了减小绕组线圈电感对测量结果的影响，首先根据变压器等效电路来实际测试得到变压器回路的等效电感值，之后根据基频下的电感值来计算待测频率下的等效电感值并进行补偿，最后通