Integration of power electronics in transmission system is addressed in two main topics:
- Modelling and control of large AC/DC or DC/DC converters and HVDC grids: Some specific complex AC/DC and DC/DC converters have been studied and developed and some other are still under development. The control and dynamic stability have to be studied. Gathering many AC/DC converter on a single DC grid leads to the study of an HVDC grid which has its own dynamic behavior to be analyzed.
- Stability studies of AC transmission system with large penetration of power electronic converter: When replacing synchronous machine by power electronic converter in large AC system, the dynamic behavior is largely modified. Different solutions for the control of the power electronic converter may be studied and the stability analysis of this kind of new AC system is also a very large challenge.