Control system for flow of turbined water from a plurality of hydroelectric plants

A system for driving a turbined water flow rate of a plurality of hydroelectric plants arranged in series along a watercourse with an open channel flow, defining upstream of each of the hydroelectric plants a plurality of respective reaches subjected to hydraulic flow rate and level requirements, said plurality of hydroelectric plants comprising at least three hydroelectric plants, wherein the turbined water flow rate for each of said plants is controlled by means of a flow rate setpoint on said plant determined from a run-of-the-river flow rate setpoint taking into account a level regulation of the reaches and the inflow rates in said reaches,

• wherein the system comprises a regulation of an overall power output setpoint for said plurality of hydroelectric plants by means of a regulation flow rate setpoint taken into account by the flow rate setpoint of each of said plants and in that said regulation flow rate setpoint determined by said regulation is weighted for each of said plants by means of weighting coefficients as a function of the respective flow rate and level hydraulic requirements of the reaches defined upstream of said plants in order to meet said flow rate and level hydraulic requirements.