基于三次样条插值的低压电器瞬时试验数据分析

详细阐述了三次样条插值在试验数据分析中的应用。推导了k个数据点插值函数系数的求解公式。分析了利用插值函数逼近原函数时的最大误差。最后,利用前述方法对谐波试验数据进行分析,给出了分析结果。与传统方法相比,通电时间和谐波试验通电占空比的计算更加科学、公正和准确。试验结果表明,该方法彻底消除了阈值设定对试验结果的影响。

Instantaneous Test Data Processing in Low Voltage Apparatus Based on Cubic Spline Interpolation

This article described the application of the cubic spline interpolation in the test data analysis. The formula to solve the k points interpolation function coefficients was derived, and the maximum error between the interpolation function and the original function was analyzed. Finally, the analysis results of the harmonic test data using the aforementioned method were given. Compared with the traditional threshold setting, the electrifying time and current duty ratio calculation in instantaneous test is more scientific, fair and accurate. The experimental results show that this method can completely eliminate the effect of the threshold setting.