NOVELTY - The power generation system (10) has a wind power system (12) comprising a wind tower (34). A closed-loop pumped liquid energy storage system (14) is configured to store liquid in an interior volume of wind tower. The wind tower comprises a height of approximately 150 meters. The wind tower is comprised of multiple frusto-conical tower sections (30) welded to one another. The first and second wind turbines (18) are each coupled to a power grid (26).    USE - Power generation system for generating power for on-site machinery such as machinery for producing goods, for creating methanol from carbon dioxide and hydrogen, for operating transportation systems such as electric rail or inductively coupled electric automobile, for operating farm or ranch machinery such as electric tractor or animal feeding system.    ADVANTAGE - The water stored in the wind energy tower flows by force of gravity, through a turbine generator, so as to generate electrical power, when power or energy generation is desired. When the wind turbine is unable to generate a desired amount of power due to insufficient wind, the pumped-hydro energy storage system is used to generate additional power. The wind turbine and the pumped-hydro energy storage system can both generate power at the same time, and thus increasing the peak power output of the system. As the height of the wind tower increases, the diameter of the tower sections increases, and thus increasing the load capacity of the wind tower. The upper dry section is accessible through a hatch, door, or other opening, and thus enabling access to the turbine and other components of the wind power system for maintenance, repair, replacement, etc. The controller optimizes and/or coordinates operation of the wind power system and pumped-hydro energy storage system to improve efficiency and cost effectiveness of the power generation system. The controller regulates operation of the power generation system to improve overall power output to the power grid, to improve cost effectiveness and efficiency of the power generation system.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a power generation system having a pumped-hydro energy storage system.    Power generation system (10)    Wind power system (12)    Pumped liquid energy storage system (14)    Wind turbines (18)    Power grid (26)    Tower section (30)    Wind tower (34)