Abstract
With the development of More Electrical Aircraft (MEA), the electrification of secondary power systems in aircraft is becoming more and more common. As the key power conversion device, the dual active bridge (DAB) converter is the power interface for the energy storage system with the high voltage direct current (HVDC) bus in aircraft electrical power systems. In this paper, a DAB DC-DC converter is designed to meet aviation requirements. The extended dual phase shifted control strategy is adopted, and a multi-objective genetic algorithm is applied to optimize its operating performance. Considering the three indicators of inductance current root mean square root (RMS) value, negative reverse power and direct current (DC) bias component of the current for the high frequency transformer as the optimization objectives, the DAB converter’s optimization model is derived to achieve soft switching as the main constraint condition. Optimized methods of controlling quantity for the DAB based on the evolution and genetic algorithm is used to solve the model, and a number of optimal control parameters are obtained under different load conditions. The results of digital, hard-in-loop simulation and hardware prototype experiments show that the three performance indexes are all suppressed greatly, and the optimization method proposed in this paper is reasonable. The work of this paper provides a theoretical basis and researching method for the multi-objective optimization of the power converter in the aircraft electrical power system.
Highlights
The aerospace industry is promoting the use of more electrical technology to enhance the performance and increase the reliability of aircraft power systems and secondary power subsystems instead of hydraulic, pneumatic systems
A novel method the which can achievefeatures the multi-objective optimization performance dual phase shift control, performance of dual active bridge (DAB) converters suchforasthe high efficiency, in low dc converters is proposed in this paper
In the DAB converter’s power transmission process, the coupled inductor L plays a very role, transmitting power either from the low voltage side to the high voltage side of the converter, important role, transmitting power either from the low voltage side to the high voltage side of the or from the high side to the low side, it uses of an inductance L is needed as the power transmission converter, or from the high side to the low side, it uses of an inductance L is needed as the power medium
Summary
The aerospace industry is promoting the use of more electrical technology to enhance the performance and increase the reliability of aircraft power systems and secondary power subsystems instead of hydraulic, pneumatic systems. High voltage DC systems (HVDCs) are very popular in aircraft electric power systems because of their simpler equipment and significant energy savings. This technology requires high power density, reliable DC-DC converter for the application of battery storage power supplies to mission critical aerospace situations, e.g., actuators and avionics. Control methods mainly focus source, single-phase current source, and single-phase resonant type. Multiple have phase-shifting control methods increased control and the control increased control variables, andhave the combination selectionvariables, and calculation of combination selection and calculation of multivariable is the key points to controlling the multivariable is the key points to controlling the performance of DAB converters. Many efforts havefrequency been made to converter improve transformers the performance of DAB converters
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