| KEYWORD |
Area Engineering
Simulation and optimisation of Ultra-Fast Electro-Mechanical Actuators for DC Breakers
keywords DC BREAKER, ELECTROMECHANICS AND THERMAL ANALYSIS, MULTI-PHYSICS SIMULATION
Reference persons IUSTIN RADU BOJOI, MAURIZIO REPETTO
Research Groups CADEMA & PEIC
Thesis type DESIGN AND EXPERIMENTS
Description Direct current grids are becoming more widespread as DC system can become convenient, with respect to their AC counterparts. For instance, over long distance they reduce capacitive loads and enable asynchronous interconnections between different parts of the AC grid. On the contrary, their operations can be more difficult due to a very small impedance limiting fault currents and to the interruption of high direct current values that cannot exploit a current zero crossing of AC systems, as a consequence DC breakers are very critical devices.
One of the main performance indexes of DC breakers is their switching speed: the lower the interruption time the lower the stresses induced by high fault current on system components. To reach extreme performance, hybrid breakers, a combination of purely electromechanical and power electronics devices, have been set up. Their design requires a highly coupled simulation of electromagnetic, mechanic and thermal transient to reach very short opening times, in the order of some milliseconds.
The master project thesis, aims at developing a multi-physics simulation model with level of accuracy and computation time compatible with parametric and optimisation iterative loops to find out the best design arrangement. During project student will propose an actuator that can attain the needed speeds and verify by simulation and experiments.
Required skills Basics of applied electromagnetism and of power electronics
Deadline 07/07/2022
PROPONI LA TUA CANDIDATURA