Aggregated Models Used for the Simulation of Dynamic Processes in Electromechanical Power Systems
TET LUH, IAL LUH, IEH LUH, TFD LUH
Dipl.-Ing. Michael Popp, Prof. Dr.-Ing. W. Mathis
Aggregating wind turbines in a wind farm is the most wide spread concept in distributed power systems, focusing on wind power generation. Typical utility-scale wind farms may consist of tens to hundreds of identical wind turbines. As a consequence, representing a wind farm with individual wind turbines for power system stability studies increases the complexity of the model, and thus requires time-consuming simulation. Studying transient effects of wind farms on the power system raises the need for simplified aggregated models consisting of a large number of wind turbines. Starting point for the modeling process are the basic nonlinear models of the wind turbine, consisting of a system of ordinary differential equations (ODE). Connecting multiple wind turbines to a bus yields a larger system of ordinary differential equations and a set of algebraic constraints implied by the nature of the bus, leading to a system of differential algebraic equations (DAE). The main objective of this project is to provide reduced order models for the aggregated wind turbines by using model order reduction techniques, while maintaining the dynamics of the wind farm models, such as transient events of a wind farm due to grid faults. A deep understanding of the underlying numerical methods for solving DAE and ODE is needed to maintain the transient characteristics of the models, representing the other major goal of this project.
Electromagnetic Realiability (EMR) of Electronic Systems for Electro Mobility (EM4EM)
LUH/TET, Audi AG, Daimler AG, Infineon AG, Conti-Temic, Bosch, NXP, ZUKEN, ELMOS, FAU Erlangen, TU Dortmund, Brno University of Technology, Insitut of Microelectronic Application, VTT Technical Research Centre Finland, Okmetic Oyj, Murata Electronics Oy
Dipl.-Ing. S. Stegemann, Dipl.-Ing. C. Widemann, Dipl.-Ing. T. Vennemann, Dr.-Ing.W. John, Prof. Dr.-Ing. W. Mathis
The EM4EM project consortium investigate and develop components and systems for electric vehicles that ensure safe operability with regard to the electromagnetic compatibility. One of the main areas of research is an electromagnetic compatibility concept for modeling immunity/susceptibility, which is an fault model that allows for the simulation of the components in the overall system.
Studies Regarding the Transfer Characteristics of Nonlinear Dynamical Systems Near the Andronov-Hopf Bifurcation
TET Leibniz Universität Hannover, Stoop Group Uni/ETH Zürich
Dipl.-Ing. Marco Reit, Prof. Dr.-Ing. W. Mathis
Modeling active dynamic processes plays an important role in physics and biology. One of the key elements in the modeling process is the behaviour of systems that feature a Andronov-Hopf bifucation, representing the birth of a stable limit cycle from an equilibrium. The system appears to be ideal for modeling the transfer characteristics of the nonlinear amplification inside the human ear it's high sensitivity to input signals. Furthermore, the high sensitivity seen in super-regenerative receiver circuitry can also be modeled by the Andronov-Hopf bifurcation.