Features and functionalities of a supercapacitorbased storage system to support the Italian transmission grid

Abstract

Energy Storage Systems (ESSs) are widely used in power systems due to their ability to provide fast responses and high controllability. Among ESS technologies, supercapacitor-based ESS are especially suitable for ultra-fast power intensive application. This paper presents the results from the field testing of a 0. 675MW / 0.017 MWh supercapacitor-based ESS installed in Terna’s HV substation in Codrongianos (Sardinia). Performance tests and special operation modes, e.g. black start and islanding, have been investigated. Also, a new functionality to proper manage the State Of Charge (SOC) is implemented.