Electric Power ›› 2015, Vol. 48 ›› Issue (4): 137-140.DOI: 10.11930/j.issn.10.11930.2015.4.137

• Power Syslem • Previous Articles     Next Articles

Assessing Harmonic Impedance and the Harmonic Emission Level Based on Partial Ridge Estimate

CUI Yangliu1, MA Hongzhong1, TANG Yiming2, GONG Jiewei1, WANG Taoyun1   

  1. 1. College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China;
    2. Jiangsu Frontier Electric Technologies Co., Ltd., Nanjing 211102, China
  • Received:2015-02-09 Online:2015-12-03 Published:2015-04-25

Abstract: A new method for assessing harmonic impedance is presented based on partial ridge regression. This method improves estimation accuracy of harmonic impedance. Using equivalent circuit consisted of both system side and customer side, harmonic voltage and current can be measured synchronously at public connection(PCC). Regression coefficients is deduced through regression equation and ridge parameter is calculated by ridge trail method. The proposed method generates smaller estimation error and overcomes estimation problem resulted from generalized ridge estimation method. Simulation results proved that proposed method is useful to analyze harmonic impedance.

Key words: harmonic, partial ridge regression, regression coefficient, harmonic impedance

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