Object-oriented design of human-machine interface for substation integration systems

The design of a human machine interface (HMI) for substation integration (SI) systems is a time consuming process because of the numerous possible substation configurations and the different data structures required for transformers, transmission lines, distribution feeders, switches, etc. in the substation. The paper describes the challenges in the design of the HMI for SI systems. Different aspects, such as LAN and WAN interfaces, a real-time and historical database, and a graphical interface are discussed. Object-oriented design and its advantages in the development of HMIs are presented. The object-oriented design tools of the selected HMI software are described. Some examples of power objects and how they function are also shown. Compatibility with RP-3599 and how it can be maintained is also discussed. This is envisioned as a dynamic process with increasing complexity of the models based on the changing requirements from the industry