Chair of Power Electronics

DFG - Formal stability assessment of hybrid distribution grids based on the correct modeling of the effect of synchronization of the power electronics interfaces

The project is to propose a stability assessment aimed at modeling and quantifying the driving phenomena of microgrid control instability. To achieve this goal, we propose to study six main elements. For each one we expect to have a dedicated task of the project. [read more].

The first task consists in the accurate time-domain modeling of microgrid (including the power electronic interfaces and their primary controls). This element is expected to provide the observation of the microgrids instability mechanisms via full-scale simulated replicas of benchmark microgrids. Once benchmark simulations are available, they can be used to derive formal quantitative assessment of stability margins. This second task is expected to provide the indices and the metrics to assess the distance from an instability phenomenon as a function of the system topology, system state and primary control laws. These metrics are expected to feed the third task represented by the design of robust controllers with particular reference to the ones used to control power converters. This design will be intimately coupled with the finite bandwidth of synchronization methods of grid-connected converters including the possible presence of finite time latency communication networks (these last ones represents the fourth and fifth tasks of the project). The final task of the project is represented by the validation of the stability metrics and the quantification of the behavior of the designed robust controllers using a combination of power-hardware-in-the-loop and real-scale microgrid experiments. This last and challenging task is expected to make use of realistic experimental setups with the least level of approximation of both the grid and the interfaced devices.


 

Title Formal stability assessment of hybrid distribution grids based on the correct modeling of the effect of synchronization of the power electronics interfaces
Coordinator Prof. Marco Liserre
Contact Person Ph.D Zhixiang Zou
Type DFG D-A-CH Project (Joint project with Switzerland)
Funding 330.000 Euros (CAU)
Partners École Polytechnique Fédérale de Lausanne
Duration 01.10.2017 - 30.09.2020
Homepage  
Keywords Hybrid distribution grids, stability assessment, time-domain modeling, synchronization, communication, validation approaches
Research

  • Our research is focused on the design of high efficient and reliable PWM-based power converter architectures (single-cell, multi-cell, multilevel), their modelling and control to exploit commercial as well as new power semiconductor devices with minimum over design.
    We develop controllers for electric drives and we are particularly skilled in the integration of renewable energy systems into the electric grid.
    Please discover our expertise looking to our recent projects.

    HEART - The Highly Efficient And Reliable smart Transformer
    Further Research Projects

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