Publikationen - Netze für Erneuerbare Energien

Marcello Schifani, Eberhard Waffenschmidt, Reza Iravani,
"Supervisory Control of Microgrids in Grid-Connected and Islanding Mode Investigations Using a Real-Time Digital Simulation Platform",
6th International Energy & Sustainability Conference (IESC 2017), 19.-20.Oct.2017, Farmingdale, New York, USA.

A robust grid structure, which makes use of distributed renewable energy generation, should consists of grid sections, which are able to seamlessly switch between gridconnected mode and islanding mode of operation. This way, failures in the upper level part of the grid can be mitigated. This contribution discusses local and supervisory control strategies, and requirements for microgrids.
A robust hierarchical control structure that allows smooth transitions of the microgrid between the grid-connected and islanded mode is proposed. The proposed local controllers for the distributed energy resources are robust against disturbances, decentralized and show a reliable referencetracking capability, which is important since transitions between operation modes involves disturbances.
To perform studies on the proposed control structures, the simulation tool PSCAD/EMTDC was used to evaluate the controller performance. Verification in a real-time digital simulator confirms the findings.

This paper is based on the masterthesis by M. Schiffani, which contains more details about this work.


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> Netz-Regelung (Grid control)


Proposed control structure

E.Waffenschmidt, 21. Oct. 2017