电流互感器用超微晶磁芯的磁化曲线拟合模型研究

Research on the magnetization curve fitting model of ultracrystalline magnetic core for current transformer

产品的高精度是产业发展的关键,准确的磁化曲线模型能够从源头上实现高精度设计.以往研究中的磁化曲线模型主要以B=f(H)曲线形式展示,其拟合精度不够高,并不适用于电流互感器磁芯的设计.结合实际生产数据,利用1stOpt 8.0软件设计了一种符合电流互感器实际设计需求的多参量H=f(B)曲线拟合模型.利用全局优化算法对模型拟合结果进行了分析,拟合模型准确度较为理想;通过单双区间不同结果的对比,也验证了拟合模型的优越性.多参量H=f(B)曲线拟合模型解决了LSSVM参数选择的难题,避免了复杂的PSO寻优过程,为电流互感器的工程应用提供了新的理论依据.

The high precision of products is the key to industrial development,and accurate magnetization curve models can achieve high-precision design from the source.The magnetization curve model in previous studies was mainly presented in the form of B=f(H)curve,and its fitting accuracy was not high enough to be applicable to the design of current transformer cores.Based on actual production data,a multi-parameter H=f(B)curve fitting model was designed by using 1stOpt 8.0 software to meet the actual design requirements of current transformers.The Universal Global Optimization was used to analyze the model′s fitting results,and the fitting model′s accuracy was relatively ideal.The superiority of the fitting model was also verified by comparing different results between single and double intervals.The multi-parameter H=f(B)curve fitting model solves the parameter selection problem in LSSVM,avoids the complex PSO optimization process,and provides new theoretical basis for the engineering application of current transformers.