The challenge to replace synchronous generators by inverter based distributed generation systems

The transient behavior of synchronous generators is of great significance for the stability of the electrical power networks. Since more and more inverter based distributed generation systems (I-DG) will replace most of the synchronous generators new requirements have to be identified in order to keep the existing quality in voltage and frequency. Some of these requirements are discussed in this paper and it is shown that I-DG systems are able to fulfill them in principle.