Novel DER and OLTC Management Scheme for Coordinated TSO-DSO Flexibility Services Provision

Abstract

In the future, increasing amount of flexibility is needed to fulfill the management needs of renewables and electric vehicles (EV) -based power systems. This paper presents a novel adaptive and coordinated management scheme for distributed energy resources (DER) and on-load-tap-changers (OLTCs) that enables coordinated and prioritized flexibility services provision by distribution network (DN) connected DER for the transmission and distribution system operators (TSOs and DSOs) by considering frequency deviation severity i.e. frequency level. Also the location and type of DER in the DN is taken into account in its active control methods and droop settings. The aim of the proposed scheme is to increase DER hosting capacity of the DN and the availability of the DN connected DER for the flexibility services provision during smaller frequency deviations as well as prioritize and maximize support for the TSO needs during larger frequency deviations. The simulation studies are done with HV/MV/LV network PSCAD model including active DER units at MV and LV networks as well as OLTCs at HV/MV and MV/LV substations.