Distribution system modeling with distributed harmonic sources

A method of analyzing distribution-system harmonic levels caused by distributed harmonic sources along feeders is proposed and investigated. Feeder and voltage predictions were compared with the actual measurements, with good results. The proposed feeder models are used to form a distribution-system model capable of studying capacitor switching and sensitivity analysis. Switching studies on one system successfully predicted the change in voltage level due to the removal of capacitance. The results indicate that the method can be used to complement harmonic measurements to minimize the measurement requirements and to provide insight into the harmonic propagation. It is concluded that the proposed method yields reasonable accuracy while minimizing data requirements and computational effort