UdZ 01.21

SPECTRUM – APPLIED RESEARCH 62 / UdZ 2-2021 Table 1: Overview of roles and information systems used Roles Information Systems Urbanist Geographic Information System (GIS) Technical planner Enterprise Resource Planning System (ERP) Foreman Data Information System (DIS) Installation technician - Grid control center employee - None of the surveyed grid operators have permanent condition monitoring in combination with a predictive maintenance application. Results of the interviews and development of use case diagrams. To obtain a holistic view of the interaction of switchgear operators, the processes along the life cycle were recorded: From installation to operation and maintenance to disassembly, the relevant roles, systems, tasks and information were documented (Table 1). The processes and findings were systematized in use cases and use case diagrams. These were then reviewed and validated within the project consortium and by the grid operators. The foreman received a fault report and a corresponding task in a data information system (DIS for short) to investigate this fault. For example, the �Incident Management�use case was discussed in detail. A foreman usually forms a team with an installer, and both are responsible for investigating the fault. This includes fault classification to report the originof the incident if a fault is found. Once the fault is identified, the installer performs the repair. To do this, the installation technicianmust takematerial from the company’s warehouse. Material handling is usually documented in an enterprise resource planning (ERP) system to accurately count the material and allocate the costs incurred. Carryingout the repair also involves creating a repair log. Since most switchgears are not yet connected to the Internet, the installer should not only document the repair activities, but also add additional information, such as the apparent condition and cleanliness of the switchgear, as well as the switching numbers. In addition to the use case shown, other use cases such as �operation and monitoring,� �maintenance,� and �plant replacement� were developed as part of the project to provide a holistic view of the relevant use cases for distribution grid operators. Derivation of an information logistics concept Based on the use cases, an information logistics concept was then derived that visualizes the data flows between actors and databases. The information logistics concept illustrates the data flow for the previously described use case �incident management�. Static and some variable data of the plant are usually stored in a geographic information system and a data information system. Grid monitoring (usually voltage and current measurement at specific measuring points) allows the grid control center to isolate certain types of faults to regions. If a disturbance is measured and identified in the grid, the foreman receives notification of the grid disturbance from the grid control center �on demand,� i.e., the grid control center transmits this information to the foreman (�data push�). Necessary information, such as