Modeling new generation and storage technologies in power system dynamics simulations

As a result of increasing environmental concern, ever more new conversion and storage technologies are connected to electrical power systems. Many of these new technologies have in common that they are grid connected through a power electronic converter. As a result, there exist significant differences between the behavior and capabilities of these technologies on one hand and conventional directly grid coupled synchronous generators on the other. The topic of this paper is modeling of new technology in power system dynamics simulation software. First, the working principles of this kind of software are summarized and a general structure that most new technologies have in common is presented. Then, the working limits of the new technology and its response to voltage and frequency disturbances are commented upon. To conclude, various ways of modeling new technologies are compared. It is concluded that new technologies can be represented as sources of active and reactive power in power system dynamics simulations and that equipping them with terminal voltage and frequency controllers leads to an improved response to voltage and frequency disturbances.