Description
This project aims to develop strategies for fault detection in variable phase-pole induction machines. The Wound Independently Controlled Stator Coils (WICSC) machine here at EPE has independent solenoidal coils for each slot, giving it potential for very good post-fault operation. With the harmonic injection current controller developed here, fault detection has to be adapted due to non-zero higher order harmonic planes. A novel fault detection has to take the control into account, but can utilize the additional degrees of freedom of the multiphase machine.
Background
With increasing level of electrification and falling prices in power electronics, multiphase machines have become an alternative to conventional three-phase machines in many applications; especially the post-fault behaviour is of high interest because constant torque is feasible in contrast to existing drives. In critical applications, such as marine, aviation or transportation, continuous operation is crucial. In order to be able to maintain operation, detection has to be reliable in the first step.
Work Plan
The work plan for this degree project contains the following steps:
- Literature study on harmonic plane decomposition (HPD), faults in electrical machines and current control for multiphase drives.
- Based on the existing Simulink models of the WICSC machine investigate behaviour under different faults and develop new models, if necessary.
- Develop fault detection strategies for different faults in HPD.
- Design and implement a circuit for imitating faults on the WICSC drive test bench.
- Perform experiments to validate the simulation results.
- Document simulation and experimental results in the thesis.
Skills
- Advanced concepts about electrical drives. Preferably taken the following courses or similar:
a. EJ2201 – Electrical Machines and Drives
b. EJ2301 – Power Electronics
c. EJ2311 – Modulation of Power Electronic Converters
d. EJ2230 – Control in Electrical Energy Conversion - Advanced experience with MATLAB/Simulink.
- Basic experience in laboratory work.
Practical Information
Contact Person: Yixuan Wu (yixuanw@kth.se)
Examiner: Luca Peretti (lucap@kth.se)
Start date: will be individually discussed
The project will be carried out at the Division of Electric Power and Energy Systems, Teknikringen 33.
