Interaction of AC Grid Filters in Aircraft and Influence of the System Dynamic Behavior

This article deals with the impact of harmonic filters' interactions in the aircraft grid, in particular, their influence on the control performance of each subsystem. The study has been carried out on a notional electrical system composed of two three-phase power converters-a voltage source inverter and an active front end. The beginning of the article presents the origin of the issue-trend of reducing the filter size and weight, which is especially true in the aircraft industry. Then, the roles of the filter and their design challenges are discussed. The next part of the article describes the controller's constraints, its design, and the control system modeling approach, including a specially developed simulation tool used for the interactions analysis. Simulation results with the experimental verification are presented showing the interactions impact on the system dynamics. Finally, optimization of the filters under dynamic control constraints considering system's components interaction are presented as the simulation tool application.