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ACT Team :: Projects :: MONGS - Monitoring of Wind Turbine Generator Systems
MONGS - Monitoring of Wind Turbine Generator Systems
Project title MONGS - Monitoring of Wind Turbine Generator Systems
Principal investigator Thomas Wolbank
Mario Vašak
Reaserchers Nedjeljko Perić
Vinko Lešić
Brief info In the past years renewable energy sources like wind energy have gained much attention due to global warming and the scheduled reduction of CO2 emissions. To keep the efficiency of the energy conversion process of wind turbines at or near its optimum value all system components have to be continuously monitored. The most critical and vulnerable components are the gearbox as well as different generator components like windings or bearings. On-line fault detection of inverter controlled generators and mechanical components are usually based on special sensor systems and evaluation instruments which makes these systems expensive and thus usually not profitable in wind turbines. The classical approaches of online condition monitoring methods like current signature analysis are not applicable as the dynamic operation, pulse width modulation and the switching transients of the power electronics devices add additional harmonics and measurement noise to all sensor signals. In the proposed project the operation of wind turbines will be investigated to identify possible fault indicators based only on the sensors already available in the power inverter. The research will cover the whole electrical power conversion process: from the control algorithms for optimal adaptation to dynamic changing wind speeds to considerations on how the system energy efficiency is reduced by emerging fault conditions of different components and to a practical verification of the detection system on a reduced scale generator system. The project objectives are thus: (1) To research and develop a wind turbine generator monitoring system based on commercially available measurements of state variables. (2) To research and develop a fault-tolerant extension of the wind turbine control system, that in case of identified faults adapts control actions to (i) protect the generator and other wind turbine components, and (ii) to keep the electrical energy production optimal under emergency circumstances.
Collaboration Technical University of Vienna, University of Montenegro; funded within SEE-ERA.net PLUS scheme
Links http://www.ieam.tuwien.ac.at/forschung/mongs/ 

JOURNAL PAPERS
Goran Stojčić, Mario Vašak, Nedjeljko Perić, Gojko Joksimović, Thomas Wolbank; Detection of Partially Fallen-Out Magnetic Slot Wedges in Inverter-Fed AC Machines at Lower Load Conditions; IEEE Transactions on Industry Applications, Vol. 50, pp. 1161--1167, 2014.
Vinko Lešić, Mario Vašak, Nedjeljko Perić, Gojko Joksimović, Thomas Wolbank; Fault-tolerant Control of a Wind Turbine with Generator Stator Inter-turn Faults; Automatika – Journal for Control, Measurement, Electronics, Computing and Communications, Vol. 54-1, pp. 89-102, 2013.
Vinko Lešić, Mario Vašak, Nedjeljko Perić, Thomas Wolbank, Gojko Joksimović; Fault-tolerant Control of a Wind Turbine with a Squirrel-cage Induction Generator and Rotor Bar Defects; Automatika ‒ Journal for Control, Measurement, Electronics, Computing and Communications, Vol. 54-3, pp. 316--328, 2013.
Gojko Joksimović, Jakša Riger, Thomas Wolbank, Nedjeljko Perić, Mario Vašak; Stator-Current Spectrum Signature of Healthy Cage Rotor Induction Machines; IEEE Transactions on Industrial Electronics, Vol. 60, pp. 4025--4033, 2013.
CONFERENCE PAPERS
Vinko Lešić, Mario Vašak, Nedjeljko Perić, Gojko Joksimović, Thomas Wolbank; Optimal Flux Magnitude Tracking with Application to Fault-tolerant Control of Wind Turbine Generators; Proceedings of the European Control Conference, ECC 2013, July 17-19, Zürich, Switzerland, pp. 466-471, 2013.
Vinko Lešić, Mario Vašak, Nedjeljko Perić, Gojko Joksimović, Thomas Wolbank; Fault-tolerant Control of a Wind Turbine with a Squirrel-cage Induction Generator and Stator Inter-turn Faults; Proceedings of the 12th International Workshop on Advanced Motion Control, 2012.
Vinko Lešić, Mario Vašak, Goran Stojčić, Nedjeljko Perić, Thomas Wolbank; State and Parameter Estimation for Field-oriented Control of Induction Machine Based on Unscented Kalman Filter; Proceedings of the 2012 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, pp. 409--414, 2012.
Vinko Lešić, Mario Vašak, Marko Gulin, Nedjeljko Perić, Gojko Joksimović, Thomas Wolbank; Field-oriented Control of an Induction Machine with Winding Asymmetries; Proceedings of the 15th International Power Electronics and Motion Control Conference, EPE-PEMC 2012 ECCE Europe, Novi Sad, Serbia, pp. LS7b-1.2-1--LS7b-1.2-7, 2012.
Goran Stojčić, Gojko Joksimović, Mario Vašak, Nedjeljko Perić, Thomas Wolbank; Increasing Sensitivity of Stator Winding Short Circuit Fault Indicator in Inverter Fed Induction Machines; 15th International Power Electronics and Motion Control Conference, EPE-PEMC 2012 ECCE Europe, Novi Sad, Serbia, pp. DS2a.10-1--6, 2012.
Goran Stojčić, Gojko Joksimović, Mario Vašak, Nedjeljko Perić, Thomas Wolbank; Inter Turn Short Circuit Detection at Higher Modulation Indexes Including Six Step Operation; XXth International Conference on Electrical Machines, ICEM, Marseille, France, pp. 7, 2012.
Gojko Joksimović, Thomas Wolbank, Nedjeljko Perić, Mario Vašak, Vinko Lešić; Dynamic Induction Machine Model Accounting for Stator and Rotor Slotting; XXth International Conference on Electrical Machines, ICEM, Marseille, France, pp. 6, 2012.
Goran Stojčić, Mario Vašak, Nedjeljko Perić, Gojko Joksimović, Thomas Wolbank; Detection of Partially Fallen-Out Magnetic Slot Wedges in Inverter Fed AC Machines Under Various Load Conditions; IEEE Energy Conversion Congress & Exposition, Raleigh, North Carolina, pp. 6, 2012.
Vinko Lešić, Mario Vašak, Nedjeljko Perić, Thomas Wolbank, Gojko Joksimović; Fault-Tolerant Control of a Blade-pitch Wind Turbine With Inverter-fed Generator; Proceedings of the 2011 IEEE International Symposium on Industrial Electronics, pp. 2097--2102, 2011.
Goran Stojčić, Peter Nussbaumer, Gojko Joksimović, Mario Vašak, Thomas Wolbank; Separating Inherent Asymmetries from High Sensitivity Rotor Bar Fault Indicator; 8th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, pp. 7 pages, 2011.
Gojko Joksimović, Jakša Riger, Thomas Wolbank, Nedjeljko Perić, Mario Vašak; Stator Line Current Spectrum Content of a Healthy Cage Rotor Induction Machine; 8th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, pp. 6 pages, 2011.
Vinko Lešić, Mario Vašak, Nedjeljko Perić, Thomas Wolbank, Gojko Joksimović; Fault-tolerant Control of a Wind Turbine with a Squirrel Cage Induction Generator and Rotor Bar Defects; Proceedings of the 17th International Conference on Electrical Drives and Power Electronics, pp. 364--369, 2011.
Goran Stojčić, Matthias Samonig, Peter Nussbaumer, Gojko Joksimović, Mario Vašak; Monitoring of Rotor Bar Faults in Induction Generators with Full-Size Inverter; EPE'11 ECCE Europe Power Electronics and Adjustable Speed Drives: Towards the 20-20-20 Target, pp. 8 pages, 2011.
Goran Stojčić, Gojko Joksimović, Mario Vašak, Nedjeljko Perić, Thomas Wolbank; A method to detect missing magnetic slot wedges in AC machines without disassembling; Proceedings of IECON 2011 -- 37th Annual Conference of the Industrial Electronics Society, pp. 1698--1703, 2011.
PHD and MSC THESES
Vinko Lešić; Fault-tolerant Control of a Wind Turbine subject to Generator Electromechanical Faults; PhD Thesis University of Zagreb, Faculty of Electrical Engineering and Computing; 2014.