Enhancing Microgrid Stability through a Hybrid Virtual Synchronous Machine Topology

Abstract

Abstract: Combined heat and power generation (DER) produced by diesel generators is gradually being replaced by consumer renewable energy (RES). However, since RES sources often reduce the inertia of the grid, they can cause serious problems, especially in microgrids. Therefore, inverters interacting with different DERs connected to the microgrid need to change their control method. Because of their similarity to synchronous motors, virtual synchronous generators (VSGs) are one of the best known for microgrid power generation and can be included in a safety assessment. Many questions remain, as VSGs are still a new concept and are often considered for DER integration in microgrids. In addition, although the business and the ideas that develop it are discussed in the business literature, there is no difference in everything that can be found in the literature. The integration of VSG-based inverters into microgrids with different renewable energy sources is the focus of this article. This PhD is the result of a collaboration between the two laboratories G2Elab and Lab, Schneider Electric and its R&D transformer group.