A method to determine the harmonic contributions of multiple loads

This paper presents a data correlation based idea and associated technique for determining the individual harmonic impact of multiple harmonic-producing loads scattered in a power system. The technique uses continuously recorded voltage and current data at each load point. The data are processed to determine the degree of association among the harmonic level at a measurement point and the behaviors of loads monitored. The results, degree of association, can be used to estimate the harmonic impact of each load. A real life case is used to illustrate the proposed technique. It is found that the technique can reveal the harmonic impact of the loads if the data points are selected judiciously.