INVESTIGATION OF INTERACTIONS AMONG THE MULTI-CONTROL CHANNELS OF UPFC USING NORMAL FORMS OF VECTOR FIELDS

摘要

One of the most important features of the unified power flow controller (UPFC) is its multiple control functions which are implemented by multiple controllers. However, recent simulation studies have demonstrated the existence of the dynamic interactions among different controller channels of UPFC, i.e. power flow controller, AC voltage controller and DC voltage controller. This paper is concerned with the application of the normal forms to analyze the interactions among the multi-controller channels of UPFC in power systems. Moreover, a non-linear interaction index is developed to investigate the interactions among these UPFC controllers. The employed approach has been applied to the New England test power system (NETPS). The simulation results validate the proposed approach.