  The paper presents accurate and simple dynamic model of a supercapacitor bank
system for power system dynamics studies. The proposed model is derived from a
detailed RC circuit representation. Furthermore, a complete control system of
the supercapacitor bank is also presented. The proposed model is easy to
integrate in any power system simulation software and consists of only up to
four standard datasheet parameters. The performance of the proposed model in
grid frequency control and low-voltage ride through is illustrated on IEEE
14-bus test system in DIgSILENT PowerFactory. It is shown that in case of
transient stability simulations the ideal (simplified) model of the
supercapacitor can be used while in case of frequency control the ideal
representation may not always be appropriate.
