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Steinkohl, Joachim

Joachim Steinkohl

PROJECT TITLE: Reliable Control of Power Electronic based Power Systems

PhD period: 2018.04.01 – 2021.03.31.
Section: Power Electronic Systems
Research Programmes: Efficient and Reliable Power Electronics and Electronic Power Grid (eGrid)
Supervisor: Frede Blaabjerg
Co-Supervisors: Pooya Davari and Xiongfei Wang
Contact Information

Collaborator: To be announced later. 
Funding: Villum Foundation.


The increasing number of connected renewable energy sources, such as wind and photo- voltaic to the grid, puts high demand on the grid and also on the power electronic converters. This implies that the capacity of distributed generators is increasing rapidly and a significant sharing of these compared to centralized generators are to be seen in the next few decades.

Today the main production of electrical energy comes from large power plants, which due to their large inertia gives the conventional grid high stability and robust performance. Therefore when distributed generators do not constitute a big part of the full grid capacity, the power system stability is not at risk. But for future higher penetration of distributed generators in the grid, the system stability cannot be guaranteed if these units are not properly understood and controlled.

Nowadays the requirements for distributed generation units have been extended to Fault Ride Through and reactive current injection. Also the power decrease due to overfrequencies is required in many countries nowadays. But future power grids will require controller performances over a wider bandwidth of stability criteria. These future control structures will have to be carefully designed to allow the step by step implementation in all future power generation devices in the existing grid with the capability of forming a reliable, purely power electronic based power grid in the future.


Publications in journals and conference papers may be found at VBN.