Using Control Capabilities of DER to Participate in Distribution System Operation

This paper presents a case study based on a real distribution network with a high share of distributed generation. We built the simulation on the present network topology and generated a scenario for the expected future with a high penetration of DER (distributed energy resources) and an increase of the consumption. Even with a load growth exceeding the substations capacity the simulated network can be operated with a high security of supply. This degree of power quality is guaranteed by controllable DER units which are capable of operating in an islanded mode and of providing voltage control and congestion management as ancillary services. Simplified models of common DER units are described. They allow a simulation a thousand-node network.