Choosing Appropriate Power System Simulation Models for Different Events

This report forms a discussion relating to what types of power system models there are and what software packages are available to investigate different power system phenomena. The responses which might emerge to perturbations to the power system are tabulated to provide examples of Automatic and Manual interventions – that is, responses which can emerge endogenously from the system or those which can be controlled by human operators over different timescales. Similarly, the types of simulation models which could be used to investigate these different aspects are described and how they may interact or be leveraged in a wider-ranging resilience assessment. These are categorised based on being either Initial Condition Simulators that allow a range of different system conditions to be postulated, defined in such a way as to allow subsequent assessment of the impact of disturbances, or Power System Perturbation Simulators such as dynamic simulators which model the impacts of disturbances on these original conditions, such as short circuits or loss of generation infeed.