Localization of Multiple Harmonic Sources for Inverter Loads Utilizing Periodogram

Abstract

This paper introduces a new technique to localize the multiple harmonic sources that caused by power inverter loads in power distribution system utilizing periodogram technique with single-point measurement approach at the point of common coupling (PCC). The periodogram technique is used to analyzed and distinguish multiple harmonic sources location in power system whether at downstream, upstream or both stream by their impedances characteristics. The proposed localization of multiple harmonic sources method is based on the correlational relationship between fundamental impedance (Z1) and harmonic impedance (Zh) in order to identify the suspected buses. The adequacy of the proposed methodology is tested and verified on distribution system for several different cases.