Resource Center : Document

Resource Center

  • Video
  • Power Systems
  • Software-In-the-Loop (SIL)

Demo | Innovative Software-in-the-Loop (SIL) Testing Tools for Grid-Forming Converter Control | OPAL-RT Learning Journey

Author : Etienne Leduc, Md Nasmus Sakib Khan Shabbir & Juan Felipe Patarroyo-Montenegro

In this webinar, learn about the latest edition of OPAL-RT's MATLAB-Simulink-based control library, the Smart Inverter Control Library. In addition to the existing grid following functions where inverter interfaced energy resources are connected with the traditional power grid, grid forming functions for islanded operation of inverter interfaced energy resources have been added to the library. The control architecture of grid-forming inverters is developed in layers containing hundreds of modules and sub-modules requiring calibration and synchronization—a delicate and time-consuming process. Therefore, to ease the burden of detailed design and ensure flexibility, diversity, ease of use, and effective time management, the toolbox has been developed in a modular fashion. It supports IEEE 1546-2018 and IEEE 2800 standards for grid-forming inverters. Three configurable grid forming functions (Droop, Virtual Synchronous Generator (VSG), and Synchronverter-based control) have been integrated. The library facilitates Rapid Control Prototyping (RCP) and Hardware in the Loop (HIL) experiments through a real-time simulator, where the simulator acts as the controller, interfaced with real-life devices through communication protocols such as Modbus TCP and IEC 61850 GOOSE. Moreover, the toolbox can also be used in offline MATLAB-Simulink simulations of smart inverter grid-forming applications. In this example, the grid-forming Smart Inverter Control toolbox has been used to control the operations of two inverter-interfaced distributed energy resources (DER) having different nameplate ratings while operating in parallel in the context of an islanded microgrid. Both controllers adopt droop control as the grid-forming function. The library ensures proportional power sharing between the DERs and maintains stable voltage and frequency of the islanded microgrid.