The harmonic impedances are important for both utility companies and their customers. The data have many uses, such as estimating harmonic emission levels, designing filters. Complex independent component analysis is a well‐accepted method for harmonic impedance estimation. However, a lack of data points for each calculation leads to wrong results. To increase the feasibility of this method, we proposed a constrained complex independent component analysis‐based method by adding the essential feature of the harmonic impedance matrix. Thus, the recovered source signals, which are highly consistent with the original source signals can be found when the data quantity for each calculation is little. The method has been verified using simulation studies and extensive field data. The results show that the proposed method can serve as a useful tool to support the harmonic impedance calculation task of utility companies and their customers.

中文翻译：

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基于阻抗矩阵约束的谐波发射电平估计方法

谐波阻抗对于公用事业公司及其客户都非常重要。数据有许多用途，例如估算谐波发射水平，设计滤波器。复杂的独立分量分析是谐波阻抗估计的公认方法。但是，每次计算缺少数据点会导致错误的结果。为了增加该方法的可行性，我们通过添加谐波阻抗矩阵的基本特征，提出了一种基于约束复杂独立分量分析的方法。因此，当每次计算的数据量很少时，可以找到与原始源信号高度一致的恢复的源信号。该方法已通过仿真研究和广泛的现场数据进行了验证。