High speed modeling approach of aircraft electrical power systems under both normal and abnormal scenarios

The more-electric aircraft concept is a fast-developing trend in modern aircraft power systems and will result in an increase in electrical loads fed by power electronic converters. In order to ensure the power system integrity and investigate overall system performance under possible normal and abnormal scenarios, extensive simulation studies need to be undertaken to study the generator-load dynamic overview. The increased use of the motor drive system and power electronic converters will make the simulation study of the large-scale aircraft power system suffer from impractical computation time. Even worse, the simulation cannot be converged due to the model complexity. There is a growing need for accurate and time efficient model for the aerospace application. This paper presents the simulation study of a twin-generator aircraft power system based on the functional representation of individual power system units. Such a twin-generator aircraft power system will be studied under both normal and abnormal operation conditions. It is demonstrated that the functional model of the power system units can be integrated to study a complex aircraft power system with high simulation speed. The acceleration in computation time attainable shows the performance of the functional modeling approach.