Power system harmonic state estimation using WLS and SVD; A practical Approach

The harmonic state-estimation (HSE) method appears to be effective but its applicability has yet been fully verified using actual data in power systems. Particularly in Iran, there has been no verification of the applicability of the method in actual power systems. In this paper, the conventional weight least square method and a new singular decomposition method have been applied on 132KV and 230KV networks of Khuzestan power system. Khuzestan is one of the biggest and most industrial provinces in Iran. In the proposed method, in order to improve the precision of HSE, uncertain parameters R, X, and Y of the transmission lines are determined from measured fundamental data.