Harmonic Contribution Quantification for Multiple Harmonic Sources Based on Minimum Impedance Fluctuation

The background harmonic fluctuation has a significant impact on the results of contribution quantification. However, existing methods, especially those applied for multiple sources scenario, usually assume that harmonics remain constant, which is inconsistent with actual operation power grid. Thus, method based minimum impedance proposed to quantify in scenario. First, roughly estimated and used calculate unmeasurable harmonics; Second, measured are sequenced according size harmonics, divided into several segments suppress adverse effect fluctuation; Finally, solved by minimizing function data each segment, quantified. Compared can reduce obtain more accurate due preprocess harmonics. effectiveness verified case studies.