Abstract：This paper proposes a new method to estimate the system harmonic impedance and the harmonic emission level based on the improved weighted support vector machine (WSVM) regression.According to the differences of harmonic measurement data at the point of common coupling,the WSVM can be obtained by correcting the error requirement of SVM by using Euclidean distance as a weighted index and determining the weighted coefficient of the penalty parameter by linear interpolation.Then the system harmonic impedance and the harmonic emission level can be calculated.Based on analyzing the simulation of the circuit and the practical application of field data,it proves that the proposed method can effectively restrain the influences caused by the fluctuation of the background harmonics on the estimation results.
邱思语，杨洪耕. 改进的加权支持向量机回归的谐波发射水平估计方法[J]. 电工技术学报, 2016, 31(5): 85-90.
Qiu Siyu,Yang Honggeng. Assessment Method of Harmonic Emission Level Based on the Improved Weighted Support Vector Machine Regression. Transactions of China Electrotechnical Society, 2016, 31(5): 85-90.
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2016, Vol. 31 
