Requirement Analysis with SysML for Concept Design of Offshore Wind Farm Grid Connection

Inhalt:
Energy networks are continuously changing and expanding, e.g. due to the integration of renewable energies. For example, many offshore wind farms (OWF) have been built and are planned in the near future. This makes the development of reliable and cost-efficient grid connection systems important. High voltage direct current (HVDC) is a suitable technology for connecting large OWFs far away from shore. Many HVDC based grid connection topologies are possible. Therefore, a systematic development methodology for complex systems based on a holistic approach is required. As part of this research, Model Based Systems Engineering (MBSE) integrating the System Modeling Language (SysML) is applied for the development of a HVDC grid connection for OWFs. With this methodology it is possible to develop a detailed system model for a case study step by step, considering stakeholder objectives, constraints and requirements. SysML allows the creation of an abstract system model allowing an appropriate design in the early project phase while avoiding costly late changes. This paper focuses as a first step on the requirement engineering with a subsequent conceptual design of the grid connection system and provides a levelized cost of energy (LCOE) improved and efficient system concept as a result.