A fast dynamic phasor model of autotransformer rectifier unit for more electric aircraft

This paper presents a dynamic phasor model of the autotransformer rectifier unit (ATRU) for the more-electric aircraft power system study. This model considerably reduces the complexity in modeling of an aircraft power system making it more practical to model the electrical power system for transient and stability analysis. The developed phasor model of the ATRU is based on the development of a non-switching fundamental component model of the ATRU, in which the switching behavior of the 12-pulse diode rectifier is represented by a dc transformer. The developed phasor model is capable of accurately modeling both ac- and dc-side transients. The computation time demanded by this phasor model is significantly reduced compared to the benchmark model. Simulation results show that the dynamic phasor model of the ATRU is nearly 500 times faster than the corresponding benchmark model.