Presented during the AWESCO Midterm Review Meeting, 8 February 2017, KU Leuven, Belgium (H2020-ITN-642682).

1. 08.02.2017
Robust Fault-tolerant Control for the Electrical
Drive of Airborne Wind Energy Systems
Munich School of Engineering (MSE)
Research group “Control of Renewable Energy Systems (CRES)”
Technische Universität München
Midterm Research Review
KU Leuven, Leuven
Belgium

2. 08.02.2017 2
Introduction
Conventional wind turbines (WT)
“Robust Fault-tolerant Control for the Electrical Drive of Airborne Wind Energy Systems”
§ Electrical faults represent ≅55% of WTs faults
Contribution of WT subsystems to failure

3. 08.02.2017 3
AWESCO ITN H2020
Objective and outcomes
“Robust Fault-tolerant Control for the Electrical Drive of Airborne Wind Energy Systems”
§ Fault-tolerant control of the electrical drive for AWE systems
Ø AWE three-phase drive
AWE electrical drive with the expected electrical fault regions

4. 08.02.2017 4
AWESCO ITN H2020
Objective and outcomes
“Robust Fault-tolerant Control for the Electrical Drive of Airborne Wind Energy Systems”
§ Fault-tolerant control of the electrical drive for AWE systems
Ø AWE three-phase drive à Fault-tolerance capability for regions 2, 3, 4 à Six-phase operation

5. 08.02.2017 5
AWESCO ITN H2020
Objective and outcomes
“Robust Fault-tolerant Control for the Electrical Drive of Airborne Wind Energy Systems”
§ Fault-tolerant control of the electrical drive for AWE systems
Ø AWE three-phase drive à Fault-tolerance capability for regions 2, 3, 4 à Six-phase operation
ü ≈20% derating for an open-circuit fault compared to ≈67% for three-phase machines
ü 50% reduction in converters capacity which, for high power systems, is cheaper
ü Ability to operate up to four disconnected phases
ü Enhanced efficiency and
ü Less audible noise, torque ripples and vibratory motion

6. 08.02.2017 6
AWESCO ITN H2020
Objective and outcomes
“Robust Fault-tolerant Control for the Electrical Drive of Airborne Wind Energy Systems”
§ Fault-tolerant control of the electrical drive for AWE systems
Ø AWE three-phase drive à Fault-tolerance capability for regions 2, 3, 4 à Six-phase operation
Fault-tolerance test bench for emulating an AWE system with six-phase drives

7. 08.02.2017 7
AWESCO ITN H2020
Objective and outcomes
“Robust Fault-tolerant Control for the Electrical Drive of Airborne Wind Energy Systems”
§ Fault-tolerant control of the electrical drive for AWE systems (In progress)
§ Enhance the electrical efficiency and optimum control of the adopted synchronous
machine-based drive
Ø H. Eldeeb, C. M. Hackl, and J. Kullick, “Efficient operation of anisotropic synchronous machines for
wind energy systems”, Journal of Physics: Conference Series Vol. 753, pp. 112009, 2016.
doi:10.1088/1742-6596/753/11/112009.
Ø H. Eldeeb, C. M. Hackl, L. Horlbeck and J. Kullick “A unified theory for optimal feedforward torque
control of anisotropic synchronous machines”, IEEE Transactions on Power Electronics (under
review).
ü 6x faster algorithm for real-time prototyping and more precise than conventional methods

8. 08.02.2017 8
AWESCO ITN H2020
Objective and outcomes
“Robust Fault-tolerant Control for the Electrical Drive of Airborne Wind Energy Systems”
Electrical drive subsystems: (A) dSPACE real-time control system, (B) Back-
Back converter, (C): Host computer, and (D) dual three-phase drive system
A
B
C
D

9. 08.02.2017 9
AWESCO ITN H2020
Objective and outcomes
“Robust Fault-tolerant Control for the Electrical Drive of Airborne Wind Energy Systems”
§ Fault-tolerant control of the electrical drive for AWE systems (In progress)
§ Enhance the electrical efficiency and optimum control of the adopted synchronous
machine-based drive
Ø H. Eldeeb, C. M. Hackl, and J. Kullick, “Efficient operation of anisotropic synchronous machines for
wind energy systems”, Journal of Physics: Conference Series Vol. 753, pp. 112009, 2016.
doi:10.1088/1742-6596/753/11/112009.
Ø H. Eldeeb, C. M. Hackl, L. Horlbeck and J. Kullick “A unified theory for optimal feedforward torque
control of anisotropic synchronous machines”, IEEE Transactions on Power Electronics (under
review).
ü 6x faster algorithm for real time prototyping and more precise
§ Development encoderless control
Ø M. Abdelrahem, H. Eldeeb, C. Hackl, and R. Kennel "Predictive MRAS Observer for Encoderless
Control of PMSG-based Wind Turbines“, IEEE Trans. Industrial Electronics (under review)
ü Estimate speed and position with acceptable accuracy up to 1.5 rad/s for isotropic PMSM (same
machine adopted at Enerkite)

10. 08.02.2017 10
AWESCO ITN H2020
Outlook and secondements
“Robust Fault-tolerant Control for the Electrical Drive of Airborne Wind Energy Systems”
§ Future outcomes in 2017
Ø Exploit, model and control electrical drive during one or more open phases
Ø Assemble the six-phase setup
Ø Verify experimentally the proposed fault-tolerant controller
Ø Joint work with ALU-Freibueg in applying NMPC for controlling the electrical drive
§ Secondments
2016:
Ø Ampyx power (06.03.2016 – 03.04.2016)
Ø Enerkite (10.04.2016 – 24.04.2016)
2017:
Ø Chalmers University
Ø Ampyx power

11. 08.02.2017 11“Robust Fault-tolerant Control for the Electrical Drive of Airborne Wind Energy Systems”
THANK YOU!