Study of harmonic propagation in transmission networks with high penetration of power electronics devices

Power Quality (PQ) disturbances result in significant financial losses to both network operators and end users. With the increasing regulatory requirement to monitor and improve PQ, the mitigation of PQ disturbances becomes even more important. This paper focuses on assessment of the harmonic performance at transmission network level considering increasing presence of stochastic and intermittent power electronics (PE) interfaced distributed generation (DG) in the network. A number of case studies considering different levels of penetration and types of DG are performed attempting to correlate the level of DG penetration with the harmonic performance. The propagation studies are performed using probabilistic harmonic load flow. The network model adopted for the studies is 68-bus of the New England Test System and the New York Power System.