Overflow reduction control systems in hydropower stations

摘要

A device for redirecting of electrical energy from an electrical generator (2) in a water power plant comprises an electrical load (7), an electrical switch (6) arranged for connecting the electrical load to the generator and a control system (5) for control of the device. The control system is connected to sensor units of the generator, indicating rotational speed of the generator and/or output power of the generator, and within a generator circuit breaker (3), indicating the position of the generator circuit breaker, The control system is arranged for activating the electrical switch to connect the electrical load when it is determined by the sensor units that the generator circuit breaker is open and that an increase in rotational speed in the generator exceeds a first predetermined threshold value, alternatively that the output power of the generator falls below a second predetermined threshold value.