Chair of Power Electronics

Grid Converters for Renewable Energy Systems


Prof. Dr.-Ing. Marco Liserre and staff

Target group:

Students of the master courses “Electrical and Information Engineering” and “Electrical and Information Engineering and Business Management”

Recommended prerequisites:

Introduction to electrical energy technology, Power Electronics I


3 SWS (2 SWS lecture, 1 SWS exercise), 4 ECTS
English (lecture), English/German (exercises)


Grid-connected PWM converters are gaining increasing importance in view of a growing contribution of Distributed Power Generation Systems (DPGS) to the total power flow in the European electric grid. This is also owed to an increasing inflow from Renewable Energy Sources (RES).

After a review of the power electronics solutions used for Photovoltaic (PV) and Wind Turbine (WT) systems and an overview about modulation and current/voltage control techniques, the course focuses on the specific issues related to the connection of a PWM converter to the grid.

Topics overview:

  • PV converter topologies
  • WT converter topologies
  • Overview of PWM modulation
  • Overview of Current Control techniques
  • Single-phase synchronization with the electrical grid
  • Three-phase synchronization with the electrical grid
  • Harmonic rejection
  • Grid-filter design and resonance issues
  • Parallel connection of power electronics converters

Remus Teodorescu, Marco Liserre, Pedro Rodriguez “Grid Converters for Photovoltaic and Wind Power Systems”, Wiley-IEEE, ISBN 8-0-470-05751-3, January 2011.


  • 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