Expert system scheduling of cascade hydro-electric plants

The hydrological interdependence of plants in cascade hydro-electric systems means that operation of any one plant has an effect on water levels and storage at other plants in the system. Hydro plants may be dispatched to meet predicted demand, to trade electricity at a commercially opportune time, or to adjust water levels in the system. Hydrologically and commercially efficient operation of cascade systems requires that water resources and energy trading are managed simultaneously. This paper describes some of the principles of cascade water management and the development of an expert system which assists in the optimal scheduling of hydro plant within Scottish Hydro Electric plc's system.