Real-Time Simulation of Interconnected Distributed Energy Resources Using SocKeT Communication

Increasing interconnection of the Inverter Based Distributed Energy Resources (DERs) in the power network brings planning and operation control challenges. A dedicated communication network for reliable operational necessities is required with the increasing implementation of microgrids worldwide. User Datagram Protocol (UDP) is the simple and easy-to-use communication link for controlling operation in a microgrid. Real Time Digital Simulator (RTDS) facilitated with GTNETx2 card using UDP SocKeT(SKT) protocol connected to the external hardware for closed-loop communication. In this paper, the role of the communication layer interfaced for the breaker operation under steady state and transient conditions are studied. The control centre issued the operating commands for the breaker to switch the operating mode depending on the measurement of the various grid parameters. This work gives an overview of the microgrid schematic for the stabilized operation from the grid mode to the island mode and then back to network restoration as the system met all the operational requirements with the application of SKT protocol. The grid forming battery storage supporting the DERs connected in the network in Islanded mode to supply the load demand. The simulation results illustrate the implementation of the communication link in the power network for controlled microgrid operation.