The Rhine power station Schaffhausen is a run-of-river power station with 2 machine groups and 3 weir fields. The automatic water balance system (WHA) of the power plant has been completely renewed. It controls and monitors the entire river waterway fully automatically and ensures that, on the one hand, the water level is maintained in accordance with the concession and, on the other hand, the water supply is used optimally under numerous boundary conditions. The WHA essentially consists of a central control system with parallel effective path interfaces to the turbine controllers, the process stations for the weir fields and the peripheral measuring equipment. The most important data points of the WHA are integrated into the higher-level control system for central monitoring. An emergency control panel in the central control centre serves as the central emergency control point for the machine groups and the weir system.
At the beginning of March, the new WHA was handed over to the Schaffhausen power station after successful trial operation. A special challenge was the measuring point at Schifflände, where the connecting shaft from the measuring shaft to the Rhine has a very unfavourable geometry. Together with the operation, however, a practical solution was found. The water temperature measured there is also very important. It gives the people in Schaffhausen an important indication in summer as to whether it is worth taking the plunge into the cool water or not.