The ofVerte LeitStand project set out to create an open, scalable control system for electric distribution networks that contain a high share of renewable generation. The core technical contribution was the seamless coupling of the SCADA platform zenon with the power‑system simulation tool PowerFactory. By exploiting the OPC UA interface, simulation results generated in PowerFactory are streamed in real time to zenon, where they are visualised on a dynamic map of the medium‑voltage network. A Python script orchestrates the start‑up of PowerFactory, activates the appropriate project, establishes the OPC UA link, and triggers the quasi‑dynamic simulation. This automation eliminates the manual data exchange that previously had to be performed on the PowerFactory side, thereby reducing operator effort and shortening the simulation cycle time. In addition, a C++ application built on the PowerFactory API allows external programs to read and modify network parameters such as load levels or generation set‑points, enabling rapid scenario testing and automated optimisation runs.

The project also evaluated four conceptual architectures for the control system. Each concept was assessed against a set of criteria – including modularity, interoperability, and support for future functions – using a structured evaluation matrix. The analysis identified a hybrid approach that combines a central SCADA server with distributed edge devices as the most promising configuration for high‑renewable networks. The evaluation highlighted the importance of standard industrial protocols (OPC UA, Modbus, MQTT) and of a clear separation between data acquisition, control logic, and user interface layers. The resulting architecture supports plug‑in of additional components such as battery storage units or demand‑response devices without major redesign.

Beyond the technical integration, the project demonstrated the feasibility of a fully open system that relies on commercially available hardware and software. The use of standard protocols and open APIs ensures that the control system can be extended with new functionalities – for example, predictive maintenance or advanced fault‑location algorithms – without disrupting existing operations. The architecture also supports rolling updates and blue‑green deployment strategies, which minimise downtime during upgrades.

Collaboration was organised around four work packages. The universities of Emden/Leer and Jade Hochschule led the research and development of the control logic and simulation integration. EWE NETZ GmbH supplied real‑world network data and provided field validation of the prototype. OFFIS – Institut für Informatik contributed expertise in industrial communication protocols and helped to optimise the OPC UA implementation. The project was coordinated by the Hochschule Emden/Leer, which also managed the overall schedule and reporting. The research period ran from 1 December 2019 to 31 May 2023, and the project was funded under the German research grant 13FH112PA8. Throughout the four‑year programme, the partners delivered a working prototype that demonstrates how an open, modular control system can support the integration of renewable energy sources into distribution networks while maintaining safety and reliability.