Virtual Commissioning of an IEC 61850-Based Substation Automation System Through an Integrated Engineering Workflow

This paper proposes a structured IEC 61850-based engineering methodology for virtual commissioning of digital substations by integrating protection engineering in DIGSI 5, virtual validation using SIPROTEC DigitalTwin, and SCADA preparation in TIA Portal. Unlike conventional approaches, the proposed methodology unifies protection configuration, communication engineering, and supervisory interface in a single workflow. The methodology is evaluated using protection scenarios that assess the consistency of protection logic, relay operation, and supervisory visualization. The results demonstrate that the proposed workflow can effectively verify the coordinated development of protection and automation components before hardware deployment, reducing dependence on physical equipment during the early engineering stages.