Joint Optimization of Permanentfield Construction and Electrical-Field Trajectory for Magnetically Commuting Electric Machines
Based on available measurements from the teststand, the airgap-field of lowspeed permanent-magnet electrical drive with magnetic commutation, i.e. unequal stator and rotor-polepairnumbers, shall be modeled in a 1dim airgap distribution and numerically calculated. Especially adressing saturation, eddy current and ohmic losses, the optimal circumvental field-distribution is sought by application of available optimization-tools for the construction and optimal control based on observation of the induced voltages.

Exergyoptimal Trajectory Generation for Electromotive Systems
For energy-efficiency in transport, regenerative braking recovery and grid-feedback resp. storage of electrical energy offer significant potentials. This demands for taking into account the height-profiles, speed- and timing boundary conditions for formulating the optimization task and numerically optimizing the speed/distance profile-functions. In the case of railbound transportation, from the powergrid model developed together with Chemins de Fer Luxembourg, electrical loss profiles additionally enter.

Reliability and Vulnerability of Local Electricity Networks
With the use of realtime-communicative supervisory control and data aquisition (SCADA) systems, smart energy management becomes feasible. Interdependent functionality of netstabilizing power units and the networked control affect reliability and vulnerability, so that the design task for distributed control in case of power-network blackouts addresses structural measures for improvement of both security and reliability.

Smartgrid Topology Online Identification
For best utilization of available power transmission and distribution lines, up-to-date information about the topological status of interleaved powergrid structures is becoming indispensable on the low-voltage level in a similar same way as it is already the case on high- and mid-voltage levels. Especially in urban areas future e-mobility and distributed generation come along with increased burdens for the existing distribution structures. The use of correlation based methods on the basis of known powerline and transformer properties are to be investigated and applied to a modelproject in Luxembourg, employing as few as possible additional measuring.

Reliable Costminimizing Secondary Control in Distributed Electricity Generation
Superimposed onto primay control for dynamic disturbance compensation, secondary control establishes the overall stationary power-balance. Formulation as convex optimization problem with Lagrange-multipliers for the boundary conditions is aiming at cost-minimization. Based on convex optimization state of the art, and in continuation of previous works on Decentralized Hybrid Renewable Energy Systems, a stability guaranteed method is sought for a range of systems with specified component properties. Further, options of redundant implementation are a major concern.

Reliable Poleconstellations in Multimodel Control Design
For varying parameters, constellations and eventually nonlinearities, multimodel plant descriptions are employed. Different design methods, e.g. robust control, exact linearization, goal-criteria etc. shall be assessed and a design method be developped which takes into account a boundary for unmodeled partdynamics, i.e defining reliable poleconstellations. The controldesign methodology shall be demonstrated with an available case-study for distributed control of partial and island-grids.

Costoptimal Dispatching of Thermal-Electrical Co-Generation with Use of Storage
As for the increased economic performance, combined generation of thermal and electrical energy is an especially interesting field for biomass-use. Distributed systems shall be considered with different structures of both thermal and electrical storage allocation. Overall cost-optimization respecting the boundary conditions for coverage of thermal and electrical consumption is envisaged using the Pontryagin approach as applied in a previous thesis for electric transport, here especially addressing structural variability.

Stability Verification of Nonlinear Automata Dynamics for Modular Solar Energy Systems
The task to guarantee reliability of feedback-loop connected automata demands for analysis of interconnected sequential dynamics. For modular realizations, a promising approach aims at reliable simplifications for hidden complexity of modules. In analogy to discrete-time control stability and based on the relevant literature, the mathematical formulation of nonlinear sequential dynamics with binary addition and multiplication is to be formulated for automation of modular solar energy systems, treated in previous works. This allows for secure approximation of feedback loop interconnections and - implemented as symbolic computation tool - to guarantee overall stability.

Online Adaptive State of Charge Observation for Electrochemical Storage Units
Based on state of the art overview and in continuation of previous works on adaptive observers, a dynamic separation approach for concurrent parameter-estimation and state-observation shall be developed and applied to automotive batteries using available implementation and testing environment. Both prediction of available stored energy and of lifetime expectation are crucial for widespread reliable use of electrochemical batteries in stationary and transport applications.

Geoanalysis for Sustainable Biomass Storage and Transport in European Regions
For the geographical planning of integrated thermal-electrical supply Systems, on the basis of the Sustainable Biomass Index (SBI)planning method, geographic analysis shall be employed for distributed production, storage and consumption of selected biomass energy carriers esp. pellets and upgraded gas.

Current PhDs