NOVELTY - The system (20) has a horizontally oriented power wheel (1) rotating about a vertically oriented axis normal to a flowing current (9) and including a set of cups (2) affixed to a periphery of the power wheel. The power wheel is mechanically connected to a totally submerged hydrokinetic electrical generator housing located at a center hub (4) of the power wheel. The cups are hinged to modulate in and out of a rotational plane of the power wheel, where an amount of modulation in and out of the rotational plane is determined by available water current speed and required mechanical power input.    USE - Hydrokinetic electric power generation system (HEPGS) for converting unimpeded river, ocean and tidal flow currents into useful electrical power on a large scale.    ADVANTAGE - The system constructs and employs the totally submerged hydrokinetic electrical generator that does not have faster-than-current components to damage any aquatic life, additional structures or restrictions for normal use condition, where the generator is efficient at translating linear flow to rotational torque, strong enough to withstand severe impacts from floating debris and benign to an inland or offshore operating environment. The system delivers more power since a rotational diameter size of the power wheel is not restricted by depth of waterway. The system is designed and sized to be submerged right along side existing on-shore power plants so that the derived electrical power can be routed right into an on-shore power station to help the on-shore power station to reduce dependency on a non-renewable fuel source, thus reducing damage to the environment. The electrical power coming out of the generator is carried out through a set of power cables to an immediate shore, thus minimizing modifications of an adjacent power generation station.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a hydrokinetic electrical power generation system.    Horizontally oriented power wheel (1)    Cups (2)    Center hub (4)    Flowing current (9)    Hydrokinetic electrical power generation system (20)