1. Optimization of the Energy-Supply-Structure of modern Aircraft by using conventional power system technologies
Dipl.-Ing. Ilir Purellku
Electrical Power Systems
Helmut-Schmidt-University
Hamburg, Germany

2. Contents Introduction Layout of a modern aircraft electrical grid
Conventional power system technologies
Protection mechanisms
Phase balancing of the distribution network
Conclusion
Ilir Purellku – Germany – RIF Session 3 – 0973

3. Installed generator power on aircraft
Trend: More Electric Aircraft - MEA
Ilir Purellku – Germany – RIF Session 3 – 0973

4. Layout of modern aircraft energy supply grid
Architecture improvement due to different network topologies
Ilir Purellku – Germany – RIF Session 3 – 0973

5. Use of conventional power system technologies
Load management
High Voltage DC
Multiple fed grids
Electrical protection concepts
Ilir Purellku – Germany – RIF Session 3 – 0973

6. Electrical protection concepts
Grid protection mechanism with integrated Fuel Cell System - FCS
Stepped-Curve Overcurrent Protection
Activate the protection mechanism only for a specific current direction
Impedance-Protection
Connect the FCS in an electrical ring structure
Ilir Purellku – Germany – RIF Session 3 – 0973

7. Smart phase balancing of the distribution network
Advantages:
Weight saving due to lighter return conductor network
Less power loss in the electrical network
Ilir Purellku – Germany – RIF Session 3 – 0973

8. Phase balancing realization
Ilir Purellku – Germany – RIF Session 3 – 0973

9. Conclusion
Necessity of optimized electrical power systems due to growing demand of electrical power onboard of aircraft
Further protection concepts due to higher safety requirements
Combination of Stepped-Curve Overcurrent Protection as well as Impedance Protection
Optimization of the network due to the reduction of the asymmetries
Ilir Purellku – Germany – RIF Session 3 – 0973

10. Thank you for your attention
Source: © Airbus – The future of air transport: Airbus unveils concept airplane for 2030