Latest news on isolated island microgrids

What is an unstable microgrid?

In general, and in a specific definition, an unstable microgrid is a microgrid in which voltage/frequency collapse occurs. Voltage/frequency collapse in a microgrid means continuous increase or continuous decrease of the desired variable. On the other hand, in the microgrid, we also face the phenomenon of drop.

What happens if a microgrid is disconnected?

In the event of a disconnection, the basic parameters of the system are set by the microgrid and it must otherwise supply its loads or at least critical loads. This mode of operation is called VSI. Therefore, to apply these control methods, a series of controllers are needed on each of the microgrid sources.

Can grid-forming configuration switching be autonomous at the inverter level?

Plug-and-play management and transient reliability of converters are necessary for development, however, grid-forming configuration switching may be autonomous at the inverter level. Maintaining MG functioning requires grid-level cooperation and an understanding numerous power sources working in concert.

Can synchronized small-AC-signal injection be used for grid-forming inverters?

An islanding detection method using synchronized small-ac-signal injection for grid-forming inverters in microgrids. IEEE Trans. Power Electron.38, 5816–5831 (2023). Weise, B. Impact of k-factor and active current reduction during fault-ride-through of generating units connected via voltage-sourced converters on power system stability. IET Renew.