As part of the REEP 1000 Islands project (commissioned by German development agency GIZ), Energynautics conducted renewable energy integration studies, focusing mainly on PV, on four Indonesian islands in the regions of South Sulawesi and Bangka-Belitung.

Dynamic stability analysis was a crucial part of all studies, with the results being used to develop technical requirements for inverter based generators which become increasingly relevant with rising RE shares.

For example, in one of the islands the ability of the inverter to remain connected to the grid even in the event of voltage dips was found to be very critical for stability. Without a clearly defined and monitored corresponding requirement for inverter-based generation units, the grid cannot be operated safely and reliably. This and other technical requirements which resulted from the study were added to the connection requirements for generators by the utility.

Further information on REEP 1000 islands project

More and more countries continue to increase the proportion of renewable generation in their power system. After general integration questions on economic and technical issues with a view to annual optimization were the main component of consulting activities, the need for consulting for operation requirements within the timeframe of minutes and seconds increases.

This development is similar to the European experience. In the beginning, a small proportion of renewable energies does not pose any major challenges to the long-standing operation of power systems. However, due to the increasing inverter-based generation, a significantly different technology is slowly replacing the known world. Different concepts are already available from international experience for dealing with transient situations in the power system using inverter-based generation. These situations include events such as short circuits or the loss of generating units.

In order guaranteeing frequency, voltage and (if still applicable) rotor angle stability in the networks, dynamic simulations are an important tool for quickly identifying problems and initiating countermeasures in good time.

Further information on Energynautics’ grid studies and simulations services.