The development of future Smart Grids requires experts from different fields (such as, electrical engineering, ICT, or automation) and organisations to share knowledge with each other. This work addresses such a complex task by means of a structured approach and tool support that facilitate exchange of Smart Grid requirements and architectures. The tools presented in this study are freely accessible, rely on international standards (IEC 62559 Use Case Methodology) and frameworks (SGAM), and were successfully adopted in a large European Smart Grid project called DISCERN.