摘要
Abstract
For the sake of getting more precise curves, the paper introduces the linear interpolation method and section excitation characteristic curves. First, the paper makes interpolation to the linear part of measured voltage-current characteristic data, the weight of linear data is increased with more linear data. Second to the excitation characteristic curves of PTs, the paper adopts the 7 order polynomial function before the part of saturation depth and uses linear model at the part of saturation depth; Last, the paper fits the excitation characteristic with the aforesaid and the least square method. On one hand, the paper solves the problem of lacking data. On the other hand, the calculation sample shows that the fitting accuracy has been greatly improved before the part of saturation depth. At the same time, the fitting accuracy is not reduced at the part of saturation depth with linear model. Above all, the total fitting accuracy is improved.关键词
铁磁谐振/励磁特性曲线/线性插值法/最小二乘拟合/牛顿迭代法Key words
ferroresonance/ excitation characteristic curve/ linear interpolation method/ least square fitting,Newton's method分类
信息技术与安全科学
