Control Concepts for Microgrids

Many renewable energy sources, such as wind or solar power, are uncertain by nature and thus not completely controllable. A large proportion of renewable sources comes from small-scale distributed generation and is connected to the low and medium voltage level. This is where also most loads can be found. Thus it seems natural to attempt balancing consumption and generation locally.

The resulting local (micro) grids may be connected to the main distribution network, but can also be operated in “island mode” during faults in the main grid. This scenario implies a number of challenging control problems, which we have recently started to investigate in cooperation with Siemens AG. These include choosing a suitable control architecture, handling the transition between connected and island modes and guaranteeing stability and performance in the presence of uncertainty which is inherent in renewable energy generation.

Schematic representation of a microgrid with PCC referring to the point of common coupling to the main transmission system.

Publications

Schiffer, Johannes, Ortega, Romeo, Astolfi, Alessandro, Raisch, Jörg, Sezi, Tevfik. Conditions for Stability of Droop–Controlled Inverter–Based Microgrids, 2013. Submitted to Automatica.

Bibtex

Author : Schiffer, Johannes, Ortega, Romeo, Astolfi, Alessandro, Raisch, Jörg, Sezi, Tevfik
In : Conditions for Stability of Droop–Controlled Inverter–Based Microgrids, 2013. Submitted to Automatica.
Date : 2013

Schiffer, Johannes, Goldin, Darina, Raisch, Jörg, Sezi, Tevfik. Synchronization of droop-controlled microgrids with distributed rotational and electronic generation, 2013. To appear at 52nd IEEE CDC, Florence, Italy.

Bibtex

Author : Schiffer, Johannes, Goldin, Darina, Raisch, Jörg, Sezi, Tevfik
In : Synchronization of droop-controlled microgrids with distributed rotational and electronic generation, 2013. To appear at 52nd IEEE CDC, Florence, Italy.
Date : 2013

| PDF

Schiffer, Johannes, Anta, Adolfo, Trung, Truong Duc, Raisch, Jörg, Sezi, Tevfik. On power sharing and stability in autonomous inverter-based microgrids. In IEEE 51st Annual Conference on Decision and Control (CDC), 2012, pages 1105 -1110, dec. 2012.

Bibtex

Author : Schiffer, Johannes, Anta, Adolfo, Trung, Truong Duc, Raisch, Jörg, Sezi, Tevfik
Title : On power sharing and stability in autonomous inverter-based microgrids
In : In IEEE 51st Annual Conference on Decision and Control (CDC), 2012,
pages 1105 -1110, dec. 2012.
Date : dec. 2012

| PDF | DOI