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Harmonic current vector method with reference impedances - field measurement verification

Many techniques for detecting harmonic sources have been applied to determine the customer and the utility harmonic contributions. The paper proposes reference impedance based harmonic current vector method for determination of customer and utility harmonic contributions at the point of common coupling (PCC). The method allows calculation of harmonic contributions without knowing the actual customer impedances. It also enables better evaluation of the customer and utility harmonic contributions in resonance conditions. In the paper the method is verified with extensive field measurements. Long-term measurements are proposed for determination of harmonic contributions.